{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03985_052.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Detroit, Michigan | 1950 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"118"},{"label":"placed","value":"108"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 62, georef-snap 42, georef-street 3, snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 42.36010,-83.03756 +/-235m); p102__2 (tier 2, 42.37010,-83.05827 +/-887m); p107 (tier 2, 42.37631,-83.05037 +/-162m); p108 (tier 1, 42.37366,-83.04710 +/-187m); p12 (tier 2, 42.34296,-83.04365 +/-900m); p15__2 (tier 1, 42.34229,-83.05419 +/-100m); p31__2 (tier 1, 42.34899,-83.05676 +/-100m); p34 (tier 2, 42.35585,-83.05484 +/-1900m); p35 (tier 1, 42.35094,-83.05082 +/-260m); p48 (tier 1, 42.35434,-83.05748 +/-254m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0001","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1299.2,648.0 904.6,1814.8 286.9,1949.0 -0.0,1949.0 -0.0,573.9 1162.2,543.4 1299.2,648.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05134342421587,42.33645933498319]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04786364219233,42.33793073465851]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04551467822033,42.33485221222599]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04899446024388,42.33338081255067]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0010","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1424.6 -0.0,317.9 1619.0,344.5 1619.0,1661.7 629.0,1663.4 626.5,1459.2 -0.0,1463.0 -0.0,1424.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05158908377705,42.34214330134784]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04818790444816,42.343574978339085]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04587250292647,42.34052723603939]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04927368225536,42.33909555904815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p100","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0100","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1500.0,1909.5 379.9,1919.3 365.0,-0.0 1493.8,-0.0 1500.0,1909.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1500.0,1151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0519775,42.3668116]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,1910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0536177,42.3662183]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p101","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0101","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"261.4,1858.4 211.8,765.3 281.2,765.2 288.9,689.5 212.3,59.6 1626.0,52.3 1626.0,1849.9 261.4,1858.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0101/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[826.0,765.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0491776,42.3717041]}},{"type":"Feature","properties":{"resourceCoords":[1471.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.046956,42.371224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0102__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p102 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6612.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0102__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0102","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"360.8,1833.3 1503.0,1847.2 1503.9,104.4 369.1,93.1 360.8,1833.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0102__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.047811,42.369622]}},{"type":"Feature","properties":{"resourceCoords":[860.0,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.046265,42.370182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p103","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0103","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1477.0,1908.0 235.7,1908.3 193.7,1652.5 206.0,-0.0 1474.3,5.0 1477.0,1908.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[835.0,59.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.04359,42.3737354]}},{"type":"Feature","properties":{"resourceCoords":[1477.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.046956,42.371224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0104","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1476.2,-0.0 1488.5,1949.0 201.4,1949.0 189.4,-0.0 1476.2,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04298246837024,42.37305016236682]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0412427146959,42.37036108624002]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04550422112965,42.368834906506514]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04724397480399,42.37152398263332]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p105","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0105","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1164.1,1736.3 257.9,1770.2 182.5,1755.0 189.3,1685.2 -0.0,1675.3 -0.0,52.7 318.9,81.0 325.7,0.0 1628.0,0.0 1628.0,239.8 1573.5,233.3 1470.8,1071.1 1628.0,1095.9 1628.0,1782.8 1164.1,1736.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[899.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.048293,42.373236]}},{"type":"Feature","properties":{"resourceCoords":[182.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0497511,42.3725778]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0106","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1653.0,1688.1 1578.5,1689.3 1044.2,1698.4 789.1,1702.7 729.7,1703.7 637.2,1706.6 272.2,1711.4 178.4,949.6 -0.0,942.5 0.0,0.0 1653.0,0.0 1653.0,1688.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0106/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04881230529983,42.37614339997783]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.045620692746,42.3772296929148]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04389906717205,42.37443009032718]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04709067972588,42.373343797390206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p109","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0109/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0109","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.2,1354.4 39.9,1949.0 -0.0,1949.0 0.0,0.0 1478.5,-0.0 1505.0,269.4 1583.6,267.8 1594.3,1324.5 49.2,1354.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0109/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05264197770313,42.37803460551591]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05091609831311,42.37535819317575]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0552230093081,42.373821056636096]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05694888869812,42.376497468976254]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0011","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 25.3,1080.6 433.9,1079.7 440.6,113.8 1523.4,117.5 1523.5,1239.9 1640.0,1240.9 1640.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07127701334797,42.37179824909373]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06949086553139,42.36914018942964]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07373654582273,42.36756086695199]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0755226936393,42.370218926616076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p110","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0110","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1653.0,1506.7 32.1,1467.5 60.1,694.8 1653.0,602.4 1653.0,1506.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0110/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05083142351664,42.3756554246146]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04894162036403,42.373042334414635]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05308289288963,42.37138459932538]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05497269604224,42.373997689525346]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0111/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p111","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0111/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0111","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.4,1113.7 182.4,0.0 1353.2,0.0 1628.0,1140.5 1142.9,1949.0 10.5,1949.0 16.3,1506.2 81.2,1504.7 78.4,1113.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0111/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07399773486829,42.370733483116815]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07047865585245,42.3720555078022]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06835144467574,42.3689209747481]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07187052369157,42.367598950062714]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p112","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0112","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"285.6,1147.2 285.0,1083.3 -0.0,1083.2 0.0,0.0 1653.0,0.0 1653.0,352.9 1476.0,352.7 1479.2,1083.7 923.7,1083.3 923.8,1139.7 285.6,1147.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0112/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07108297896976,42.371847930574475]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06749192438885,42.37316511193008]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06540452432384,42.37001489936616]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06899557890475,42.36869771801056]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p113 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3258.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"694.0,151.8 98.2,137.8 -0.0,172.4 -0.0,1093.7 0.0,1802.5 -0.0,1904.7 708.6,1905.0 694.0,151.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[57.0,1905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0636671,42.3737441]}},{"type":"Feature","properties":{"resourceCoords":[708.6,1905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.062933,42.372642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p113 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"3206.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3266.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"802.3,114.8 813.9,1810.3 814.1,1849.3 1534.8,1849.6 1542.1,117.0 802.3,114.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0113__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1535.0,1080.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.065035,42.371887]}},{"type":"Feature","properties":{"resourceCoords":[1535.0,605.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.064002,42.372265]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p13","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0013","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1875.9 -0.0,1371.7 246.4,1295.5 217.4,44.7 458.1,48.1 458.5,-0.0 1640.0,-0.0 1640.0,1949.0 89.7,1949.0 -0.0,1875.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[432.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.041684,42.345441]}},{"type":"Feature","properties":{"resourceCoords":[219.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.04192,42.345799]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p14","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0014","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"745.5,1781.7 744.4,1949.0 186.3,1949.0 209.7,65.9 486.1,82.3 461.1,-0.0 1619.0,-0.0 1619.0,1792.5 745.5,1781.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.038991,42.3443227]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0372089,42.3417023]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0414766,42.3401166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0432587,42.342737]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p15 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6560.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0015","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1353.5,1887.8 1356.1,1613.3 1393.5,1613.8 1324.1,440.1 1313.7,417.9 -0.0,414.3 -0.0,1949.0 1353.5,1887.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[322.0,1306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.054021,42.3417562]}},{"type":"Feature","properties":{"resourceCoords":[321.0,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.055459,42.3437694]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0016","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,464.8 1540.2,553.9 1494.5,1399.8 1619.0,1409.1 1619.0,1949.0 53.0,1949.0 -0.0,464.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05338233297074,42.344747134479995]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04994324835444,42.346185218725886]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04761738666707,42.34310363986698]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05105647128337,42.34166555562109]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p17","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0017","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1476.1 -0.0,122.5 1400.7,116.4 1391.8,1817.4 1310.5,1834.5 642.1,1835.6 702.6,1819.2 263.6,1820.3 261.1,1472.0 -0.0,1476.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1013.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0489089,42.3476107]}},{"type":"Feature","properties":{"resourceCoords":[1389.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0485078,42.3469951]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0018","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1599.5,-0.0 1629.0,1833.5 -0.0,1863.3 81.3,1845.0 70.7,-0.0 1599.5,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04616612825926,42.3479538717845]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04448207325318,42.345272132996755]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04879286120972,42.343772456466084]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0504769162158,42.34645419525383]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0019","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,704.9 386.9,713.2 387.6,71.4 1255.5,31.5 1258.4,151.6 1295.9,151.6 1320.2,1746.4 1301.2,1880.4 -0.0,1893.8 -0.0,704.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04361391054854,42.35133081442401]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0418890924282,42.34864376554462]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04617966920964,42.34711817082585]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04790448732997,42.34980521970524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0002","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,1116.7 157.8,1116.9 156.8,828.0 676.3,817.0 518.4,288.1 802.8,129.0 1073.2,590.1 1112.9,566.0 1451.2,1190.8 1373.9,1197.3 1082.2,1368.7 1276.7,1683.5 1613.0,1475.9 1613.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[161.0,1550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0478434,42.3329519]}},{"type":"Feature","properties":{"resourceCoords":[676.0,817.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0476396,42.3345892]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0020","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1629.0,1254.5 1393.9,1324.5 1390.2,1678.0 -0.0,1637.5 -0.0,59.9 1613.7,64.7 1629.0,1254.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0421747,42.3492404]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0402368,42.3463764]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0448731,42.344662799999995]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.046811,42.3475268]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p21","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0021","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.5,220.7 1538.0,1496.3 138.1,1529.2 114.3,971.9 -0.0,974.5 -0.0,936.9 113.8,959.0 83.7,254.8 1529.5,220.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[828.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0415215,42.3509285]}},{"type":"Feature","properties":{"resourceCoords":[120.0,933.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0423628,42.3492492]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p22","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0022","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1578.2,413.4 1586.3,1949.0 27.6,1949.0 30.6,418.1 1578.2,413.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1580.0,917.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035866,42.351596]}},{"type":"Feature","properties":{"resourceCoords":[22.0,917.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0392822,42.3503731]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0023","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1695.1 -0.0,279.5 449.1,284.6 450.5,506.7 1482.2,375.9 1456.5,1703.0 -0.0,1695.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03803576650047,42.349646763503394]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0362708814765,42.347007984145485]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04048425998971,42.34544690471257]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04224914501368,42.348085684070476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0024","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1629.0,1726.1 1375.5,1723.9 1375.2,1637.0 140.1,1646.8 147.8,276.2 311.2,272.7 319.6,146.2 387.4,57.7 508.9,217.8 479.7,-0.0 1629.0,-0.0 1629.0,1726.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03661501031074,42.34748188053381]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03491681929161,42.344852638952275]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03914317626075,42.343340358405875]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04084136727988,42.34596959998741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p25","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0025","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1640.0,1855.6 1542.9,1684.3 1465.5,1760.6 1440.9,1881.9 1281.8,1863.0 1269.7,1949.0 247.5,1949.0 471.2,208.0 860.9,240.5 734.7,-0.0 1640.0,-0.0 1640.0,1855.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,1810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.037521,42.347719]}},{"type":"Feature","properties":{"resourceCoords":[237.0,179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035017,42.350314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p26","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0026","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1433.5,1542.1 1589.3,1767.5 167.7,1776.5 176.4,155.0 508.6,159.0 504.6,-0.0 1629.0,-0.0 1629.0,1518.2 1433.5,1542.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[552.0,1077.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.033915,42.351539]}},{"type":"Feature","properties":{"resourceCoords":[1366.0,1782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0345687,42.3496524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p27","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0027","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1517.7,161.5 1520.7,1786.5 111.2,1785.5 107.1,160.4 1517.7,161.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[822.0,1081.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.03507,42.353288]}},{"type":"Feature","properties":{"resourceCoords":[109.0,1081.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035836,42.354443]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0028","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"350.0,1949.0 341.8,209.3 1629.0,205.7 1629.0,1949.0 350.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03478740395013,42.3552473074925]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03123367639819,42.356532059951036]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.02916821812782,42.353367825378626]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03272194567977,42.35208307292009]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0029","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1889.6 -0.0,-0.0 384.7,0.0 377.5,437.6 1350.6,399.6 1340.4,1554.5 1369.6,1949.0 32.5,1949.0 32.0,1888.1 -0.0,1889.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0580091713616,42.346019223302655]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05447896229553,42.34738759906601]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05229414080961,42.34426493098993]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05582434987568,42.342896555226574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0003","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"414.0,81.2 1004.3,271.6 1078.4,230.5 1026.9,312.4 1640.0,1614.0 1640.0,1949.0 0.0,1949.0 0.0,1587.4 414.0,81.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[398.0,1629.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0455085,42.3347021]}},{"type":"Feature","properties":{"resourceCoords":[1320.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0466229,42.3371176]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0030","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"197.5,0.0 202.5,375.8 1066.7,325.5 1068.0,494.0 1612.7,496.7 1611.3,1949.0 69.9,1949.0 21.9,1535.9 2.2,-0.0 197.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05507517022404,42.34713907913227]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0514990823355,42.348438241722015]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04941072738737,42.34525368576793]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05298681527591,42.34395452317818]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p31 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6560.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0031__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0031","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1353.1 221.5,1347.8 222.1,1779.2 1176.1,1719.1 1179.2,1333.7 1372.1,1334.2 1365.9,140.5 1159.2,153.6 1160.6,402.6 -0.0,407.6 -0.0,1353.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[222.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.057924,42.347452]}},{"type":"Feature","properties":{"resourceCoords":[222.0,1915.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.056557,42.34541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p32","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0032","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1755.8 -0.0,-0.0 1629.0,0.0 1629.0,1510.2 1427.7,1508.4 1421.8,1949.0 1409.5,1888.0 862.6,1881.0 863.5,1712.0 -0.0,1755.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1410.0,1088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.051874,42.348911]}},{"type":"Feature","properties":{"resourceCoords":[1410.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0509958,42.3476161]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0033","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,278.5 281.9,259.5 448.9,313.5 1321.1,267.7 1321.4,349.8 1639.0,338.6 1639.0,1512.0 1525.0,1512.1 1526.1,1684.0 1315.8,1696.8 1317.5,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06111148833091,42.35075187988271]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05754229407039,42.35207112137057]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05543448008888,42.34891227883963]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0590036743494,42.347593037351764]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0036","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1378.8,1616.8 -0.0,1650.3 -0.0,149.7 1116.9,141.3 1120.7,1477.2 1377.3,1471.0 1378.8,1616.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04876672957401,42.35199604399063]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04702450898147,42.34926423044872]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05140529388451,42.34771664878583]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05314751447706,42.35044846232774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0037","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1639.0,231.7 1639.0,1870.5 1449.2,1879.5 1447.8,1949.0 187.8,1949.0 187.7,183.2 1639.0,231.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04658718687328,42.355742619001944]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04480752487348,42.35308856932818]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04904827859899,42.35151361018129]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0508279405988,42.35416765985506]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0038","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.2,1889.3 138.0,70.3 1633.0,40.9 1633.0,696.5 1239.7,685.3 1241.0,1893.8 171.2,1889.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04496053633142,42.35330457967306]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04327476403803,42.350671240877816]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04749775505938,42.34917384442583]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04918352735277,42.35180718322107]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p39","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0039","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.3,431.8 1545.2,463.9 1551.4,1738.5 143.1,1760.2 118.3,431.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1576.0,616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.041212,42.353314]}},{"type":"Feature","properties":{"resourceCoords":[888.0,1751.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0415215,42.3509285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p4","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0004","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.0,1873.5 583.1,1906.0 404.6,1819.8 452.4,1821.9 392.5,985.4 460.6,985.0 451.2,132.4 417.7,83.7 472.1,89.0 449.7,-0.0 1613.0,-0.0 1613.0,1300.9 1288.0,851.5 1259.5,852.0 1198.0,727.1 909.6,936.7 1229.9,1401.3 1321.2,1396.5 1613.0,1775.9 1613.0,1830.5 1543.5,1835.5 1415.3,1659.8 1026.0,1873.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[263.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044567,42.337852]}},{"type":"Feature","properties":{"resourceCoords":[589.0,1411.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0454,42.336915]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p40","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0040","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.5,1759.8 -0.0,1760.1 -0.0,245.6 94.2,241.9 93.8,315.8 434.9,239.7 1564.2,237.4 1564.5,1949.0 35.1,1949.0 34.5,1759.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1564.0,1419.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.03698,42.353277]}},{"type":"Feature","properties":{"resourceCoords":[1564.0,643.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.037819,42.354547]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p41","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0041","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.7,1617.2 -0.0,1623.0 -0.0,209.3 1639.0,141.0 1639.0,1675.0 1629.6,1696.9 1631.3,1775.1 1569.0,1785.0 1574.5,1949.0 156.1,1949.0 148.7,1617.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1569.0,1785.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0415547,42.3538336]}},{"type":"Feature","properties":{"resourceCoords":[129.0,466.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.04622,42.354956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p42","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0042","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.8,1776.0 -0.0,1778.7 81.1,1753.8 122.8,276.8 407.8,275.0 407.8,0.0 1556.9,0.0 1557.5,1772.7 415.4,1774.1 70.3,1856.7 70.8,1776.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1557.0,1362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.038698,42.355875]}},{"type":"Feature","properties":{"resourceCoords":[1557.0,538.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.03958,42.357207]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p43","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0043","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"284.2,1775.2 220.9,1313.3 217.4,152.9 1639.0,151.6 1639.0,1774.7 284.2,1775.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1510.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.037157,42.356439]}},{"type":"Feature","properties":{"resourceCoords":[1098.0,152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035582,42.357837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p44","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0044","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1491.9,1795.2 384.6,1791.7 389.9,165.0 1491.3,168.2 1491.9,1795.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[670.0,1086.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.036714,42.355773]}},{"type":"Feature","properties":{"resourceCoords":[670.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0382571,42.355211]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0045","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1474.0,506.4 1489.7,1949.0 -0.0,1949.0 -0.0,1504.6 182.2,1512.6 177.8,452.1 1474.0,506.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06002992300054,42.356348109290785]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0581077101644,42.35378557646581]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06220227374628,42.35208447953114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06412448658241,42.35464701235612]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0046","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.7,-0.0 1633.0,-0.0 1633.0,574.0 1550.9,571.4 1566.0,1445.1 1506.2,1610.2 1515.2,1892.8 1633.0,1897.0 1633.0,1949.0 227.1,1929.0 175.7,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05851796867275,42.35433963374771]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0566291733745,42.35174257278492]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06079402124291,42.35006485385912]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06268281654116,42.35266191482191]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p47","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0047","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1480.8,395.3 1639.0,402.1 1639.0,1362.0 1465.9,1358.9 1477.0,1856.0 -0.0,1783.6 0.0,0.0 1503.2,-0.0 1480.8,395.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0571677,42.3575835]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0551996,42.3549923]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0593694,42.353262900000004]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0613375,42.3558541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p49","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0049","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,48.3 1639.0,71.5 1639.0,1946.0 1471.7,1946.0 1477.3,1537.5 -0.0,1611.8 -0.0,48.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05361979006737,42.358848919493646]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05181216606036,42.35620914418929]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05605727620134,42.3546196758902]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05786490020836,42.35725945119455]}},{"type":"Feature","properties":{"resourceCoords":[1481.0,1083.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0543453,42.3555804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0005","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 279.4,0.0 271.7,552.7 599.0,559.2 586.0,1376.5 1295.7,1949.0 -0.0,1949.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05329062042757,42.33842552573457]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04992778671112,42.33993586347057]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04751658652388,42.33696089628342]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05087942024034,42.33545055854742]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p50","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0050","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1633.0,92.4 1633.0,1949.0 254.0,1949.0 254.0,74.5 1633.0,92.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05208576386214,42.35662068347492]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05028475714862,42.35399057177754]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0545298672896,42.35240110347844]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05633087400312,42.35503121517583]}},{"type":"Feature","properties":{"resourceCoords":[96.0,1086.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0543453,42.3555804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0051","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1471.8,1896.5 -0.0,1886.2 -0.0,1396.9 175.1,1400.8 186.7,30.8 1496.5,44.5 1471.8,1896.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04964901305638,42.36026028693833]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04787867816682,42.35764552281265]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0520569641008,42.35607893205314]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05382729899036,42.35869369617881]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p52","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0052","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"88.3,1884.2 108.7,279.0 1618.5,279.0 1633.0,1949.0 1613.6,1903.3 88.3,1884.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04811741239433,42.358065520454915]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04631805913846,42.35543479002137]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05056416794545,42.35384678097198]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05236352120133,42.35647751140552]}},{"type":"Feature","properties":{"resourceCoords":[111.0,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.048128,42.357837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p53","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0053","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1513.0,1719.0 -0.0,1718.3 -0.0,0.0 1505.0,-0.0 1513.0,1719.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[205.0,1719.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0495133,42.3599377]}},{"type":"Feature","properties":{"resourceCoords":[1513.0,1719.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.048128,42.357837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p54","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0054","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"123.2,1949.0 143.7,-0.0 1633.0,-0.0 1633.0,1949.0 123.2,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04449511259013,42.35944956469011]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04269575933425,42.356818834256565]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04694186814125,42.35523082520717]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04874122139712,42.35786155564072]}},{"type":"Feature","properties":{"resourceCoords":[126.0,1731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.048128,42.357837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0055","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"161.8,-0.0 1474.0,-0.0 1480.2,1496.5 -0.0,1505.3 -0.0,190.8 162.7,189.8 161.8,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04272219008949,42.36271774659821]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04102030421082,42.36009751075423]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04520749622775,42.35859154979978]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04690938210642,42.36121178564376]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0056","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1370.5,173.4 1363.2,1305.6 1633.0,1305.8 1633.0,1586.5 1530.9,1583.5 1529.6,1398.3 65.0,1416.1 70.5,172.7 1370.5,173.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04127169866491,42.36047770646956]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.03948585005965,42.357786347066344]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04380234389824,42.35620022531988]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0455881925035,42.3588915847231]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p57","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0057","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"170.2,144.7 1485.8,150.1 1482.7,1626.6 167.4,1610.6 170.2,144.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[827.0,1086.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.040728,42.361825]}},{"type":"Feature","properties":{"resourceCoords":[167.0,1800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.042961,42.362311]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p58","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0058","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.5,158.6 1485.5,159.6 1487.5,1331.4 1550.8,1797.8 86.9,1796.9 84.5,158.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[689.0,1088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.039394,42.359813]}},{"type":"Feature","properties":{"resourceCoords":[1488.0,1088.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.038543,42.358531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p59","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0059","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1480.9,-0.0 1481.6,1433.1 178.0,1432.0 177.3,493.0 177.0,267.3 -0.0,278.5 -0.0,0.0 1480.9,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[830.0,493.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.036675,42.363299]}},{"type":"Feature","properties":{"resourceCoords":[178.0,1432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.039406,42.363605]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p6","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0006","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.2,1682.4 -0.0,1727.7 -0.0,511.7 492.5,510.6 495.4,0.0 1613.0,0.0 1613.0,1132.3 1133.0,1133.7 1138.3,1400.7 828.7,1949.0 297.1,1949.0 140.2,1682.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[497.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0500278,42.338228]}},{"type":"Feature","properties":{"resourceCoords":[497.0,1147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.049514,42.3375706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p60","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0060","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1520.1,-0.0 1520.0,1433.3 122.6,1429.8 124.0,-0.0 1520.1,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1122.0,1432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.036953,42.359906]}},{"type":"Feature","properties":{"resourceCoords":[1122.0,497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.034918,42.360647]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p61","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0061","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.1,1443.8 225.5,10.5 1525.5,-0.0 1517.7,531.7 1629.0,533.6 1629.0,1464.8 207.1,1443.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1094.0,1457.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035582,42.357837]}},{"type":"Feature","properties":{"resourceCoords":[690.0,519.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.033998,42.359245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p62","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0062","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1486.5,1473.5 369.1,1473.2 354.6,541.6 243.3,541.5 242.8,9.4 1633.0,-0.0 1633.0,185.1 1482.9,184.2 1486.5,1473.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1070.0,542.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.032235,42.356581]}},{"type":"Feature","properties":{"resourceCoords":[247.0,1474.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.035141,42.357172]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0063","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1681.3 -0.0,-0.0 1411.0,0.0 1403.1,339.1 1629.0,344.3 1629.0,542.0 1513.0,551.1 1465.0,1651.9 1128.9,1653.1 1118.5,1852.2 1030.8,1854.8 71.6,1860.9 78.8,1681.0 -0.0,1681.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06534142583578,42.357634262493164]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06186648121086,42.35906391576529]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05956797970788,42.355969951250344]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0630429243328,42.35454029797822]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p64","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0064","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,566.1 126.1,549.8 116.7,333.2 1308.6,302.1 1285.4,1706.7 -0.0,1774.7 -0.0,566.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[805.0,1225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.059199,42.3577]}},{"type":"Feature","properties":{"resourceCoords":[805.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.059841,42.358661]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0065","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1603.5 -0.0,364.6 226.3,364.8 233.9,241.4 1247.8,244.2 1231.6,533.1 1434.8,540.2 1393.4,1624.3 -0.0,1603.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06719618209547,42.36016038951873]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06378542016493,42.361613535702695]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06144905372125,42.358576840087935]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06485981565179,42.35712369390397]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0066","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,489.9 888.6,511.4 895.2,216.2 1446.2,231.4 1405.5,1048.5 1385.5,1083.0 1304.8,1090.1 1297.5,1420.0 1415.8,1481.0 1401.8,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0641567258916,42.36146989176665]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0606097052246,42.36285005134086]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05840148678027,42.35970753671406]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06194850744727,42.35832737713986]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p67","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0067","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"901.2,1827.9 842.5,1949.0 507.2,1949.0 497.7,1867.5 462.1,1848.2 201.9,1847.4 201.0,1065.0 -0.0,1062.9 -0.0,82.2 266.6,81.1 264.0,-0.0 1562.7,-0.0 1562.9,73.6 1629.0,74.1 1629.0,1617.3 1567.5,1617.4 1578.3,1923.9 1473.7,1922.3 1467.0,1829.7 901.2,1827.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[201.0,1065.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0585011,42.3620011]}},{"type":"Feature","properties":{"resourceCoords":[201.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0601759,42.3613931]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p68","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0068","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1284.8,1949.0 3.9,1949.0 0.6,1860.3 89.6,1857.2 97.0,1949.0 200.3,1949.0 186.9,1645.2 247.6,1644.2 233.6,113.6 171.3,114.1 169.7,-0.0 1300.4,-0.0 1302.7,104.8 1264.6,105.1 1284.8,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0548196018105,42.36096149278711]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05310344695741,42.35828185557649]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05739067393816,42.35676136996409]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05910682879124,42.35944100717471]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0069","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1512.7,42.6 1519.4,-0.0 1625.0,-0.0 1624.5,1803.4 346.1,1813.9 348.9,1894.0 -0.0,1897.0 -0.0,52.5 1512.7,42.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05249924343342,42.3647456489833]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05076659621231,42.36208556879622]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05505420587046,42.36053922312864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05678685309157,42.363199303315724]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0007","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1545.2 180.6,1217.8 172.3,947.5 237.3,947.1 677.1,944.0 650.0,0.0 1640.0,0.0 1640.0,1438.2 1391.8,1417.3 1362.2,1949.0 421.5,1949.0 426.7,1902.5 400.2,1949.0 -0.0,1949.0 -0.0,1545.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04966976778034,42.33951601491894]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04619281624463,42.34098542144557]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04384692196922,42.337909550226684]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04732387350494,42.33644014370005]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0070","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1464.3,49.5 1477.4,1406.1 1304.0,1405.3 1310.8,1780.7 174.2,1776.3 155.7,41.2 53.8,43.9 60.6,-0.0 1260.9,-0.0 1261.0,48.2 1464.3,49.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05094475772263,42.36235657121755]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04922374163925,42.359695662756465]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05348110004839,42.35817090458432]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05520211613177,42.36083181304541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p71","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0071","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.4,459.3 1449.9,446.1 1451.7,558.2 1625.0,572.1 1625.0,1629.7 121.1,1650.5 114.4,459.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[74.0,554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0508712,42.3620713]}},{"type":"Feature","properties":{"resourceCoords":[74.0,1853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0495133,42.3599377]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p72","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0072","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.2,1650.5 174.0,587.8 -0.0,571.1 -0.0,458.4 1582.5,475.7 1580.3,1689.3 295.3,1686.2 295.4,1650.8 157.2,1650.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1580.0,116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044824,42.365122]}},{"type":"Feature","properties":{"resourceCoords":[1580.0,1849.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.042961,42.362311]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p73","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0073","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.7,1854.1 121.0,103.0 1625.0,104.8 1625.0,1856.2 114.7,1854.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[832.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.043282,42.365685]}},{"type":"Feature","properties":{"resourceCoords":[121.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044824,42.365122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p74","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0074","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"373.7,1840.7 366.3,111.8 1384.8,108.8 1476.5,108.4 1637.0,107.8 1637.0,1837.0 373.7,1840.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[500.0,1197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.040098,42.364651]}},{"type":"Feature","properties":{"resourceCoords":[500.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.039406,42.363605]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p75","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0075","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.5,0.0 65.9,349.5 373.2,390.1 1454.2,356.4 1420.8,1896.8 1451.5,1949.0 1247.4,1949.0 1253.4,1658.5 236.1,1691.5 232.8,1815.6 5.7,1823.4 -0.0,-0.0 58.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0075/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06881330339439,42.36247236364226]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06535841013961,42.363826586200126]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06317565614943,42.36074313674201]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06663054940421,42.359388914184144]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p76","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0076","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"924.4,1651.1 923.3,1949.0 -0.0,1949.0 -0.0,421.6 1485.4,365.8 1478.0,1653.0 924.4,1651.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[933.0,367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.063344,42.363955]}},{"type":"Feature","properties":{"resourceCoords":[1478.0,1653.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.060761,42.362316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0077","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"254.2,299.4 1439.6,274.2 1447.3,1576.0 306.7,1587.4 -0.0,1540.4 -0.0,-0.0 80.2,0.0 61.1,360.4 253.4,356.2 254.2,299.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07007370904311,42.36438165601106]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06666069227711,42.36578823875128]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06439347295218,42.36274225825186]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06780648971818,42.36133567551165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0078","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1438.7,1605.1 -0.0,1580.0 -0.0,287.0 1637.0,324.9 1637.0,354.2 1396.7,340.9 1379.8,677.9 1494.5,684.4 1438.7,1605.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06707067424549,42.36564925807399]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06362062437044,42.36709083014809]}},{"type":"Feature","properties":{"resourceCoords":[1637.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06131399188318,42.364034433962516]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06476404175822,42.36259286188841]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p79","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0079","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1501.6,1844.5 339.5,1834.0 339.3,1949.0 -0.0,1949.0 -0.0,185.2 1523.6,164.8 1501.6,1844.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1267.0,1072.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.060466,42.36501]}},{"type":"Feature","properties":{"resourceCoords":[1267.0,1844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.062139,42.364399]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0008","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1545.7,1832.7 1016.1,1835.1 1022.0,1587.5 -0.0,1649.0 -0.0,0.0 1619.0,-0.0 1619.0,1071.6 1587.0,1068.3 1619.0,1116.0 1619.0,1949.0 1552.7,1949.0 1545.7,1832.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04207181184157,42.34166648280022]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04032312682557,42.339014132357775]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04461255748305,42.337447118551864]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.04636124249905,42.34009946899431]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p80","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0080","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1394.5,155.8 1405.4,1071.0 1604.0,1071.0 1613.1,1837.5 -0.0,1837.3 -0.0,215.1 1394.5,155.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1042.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.059095,42.362919]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0585011,42.3620011]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p81","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0081","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1477.0,1949.0 -0.0,1949.0 28.0,68.0 1628.0,55.8 1628.0,1902.8 1477.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1285.0,704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.055761,42.366724]}},{"type":"Feature","properties":{"resourceCoords":[28.0,68.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0557297,42.3693161]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p82","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0082","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.3,41.8 1354.8,79.2 1292.5,1892.8 1377.8,1896.4 1375.1,1949.0 0.8,1949.0 2.3,1913.7 99.7,1889.4 153.3,41.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[422.0,700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.055068,42.365683]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,70.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0529304,42.3651773]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p83","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0083","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.5,1912.0 200.2,104.6 1628.0,105.0 1628.0,1917.5 198.5,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[848.0,1159.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0512937,42.3657754]}},{"type":"Feature","properties":{"resourceCoords":[848.0,1916.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0529304,42.3651773]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p84","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0084","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"558.0,127.1 1637.0,132.2 1616.5,1927.5 558.4,1921.0 558.0,127.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[353.0,1169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.050695,42.36485]}},{"type":"Feature","properties":{"resourceCoords":[1284.0,1169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0497008,42.363364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p85","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0085","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.9,60.6 1063.2,64.0 1054.2,1949.0 207.4,1949.0 213.9,60.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[859.0,769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.046425,42.367534]}},{"type":"Feature","properties":{"resourceCoords":[859.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044883,42.368097]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p86","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0086","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1625.4,1948.9 -0.0,1930.6 -0.0,63.3 1276.2,60.6 1279.5,760.0 1637.0,757.1 1625.4,1948.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1280.0,760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044824,42.365122]}},{"type":"Feature","properties":{"resourceCoords":[357.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044279,42.367184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p87","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0087","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1029.0,-0.0 1030.2,1908.2 215.7,1905.8 215.8,14.5 1029.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[859.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.044883,42.368097]}},{"type":"Feature","properties":{"resourceCoords":[859.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.040834,42.369571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p88","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0088","type":"ImageService3","width":1637,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1898.5 -0.0,0.0 1302.2,-0.0 1300.1,1901.3 -0.0,1898.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[863.0,1901.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.04376,42.366402]}},{"type":"Feature","properties":{"resourceCoords":[863.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.039712,42.367878]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0089","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.5,1746.9 -0.0,1761.3 0.0,0.0 46.6,0.0 46.9,158.4 107.2,161.4 109.5,576.9 185.1,605.7 184.4,269.0 1378.5,255.3 1400.9,1600.7 189.3,1690.2 191.5,1746.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07137999689066,42.366705576074885]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06788073147666,42.367972801863154]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06582922511929,42.364836450841324]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06932849053328,42.363569225053055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p9","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0009","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.1,0.0 41.0,326.0 340.8,324.6 340.6,316.1 1337.4,318.7 1321.4,1439.2 813.7,1438.1 809.8,1949.0 -0.0,1949.0 -0.0,-0.0 54.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0509837,42.3394422]}},{"type":"Feature","properties":{"resourceCoords":[1449.0,319.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0509717,42.3417484]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p90","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0090","type":"ImageService3","width":1643,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,275.2 1457.8,274.2 1448.7,1536.6 1643.0,1537.8 1643.0,1572.8 1573.8,1543.8 -0.0,1593.9 -0.0,275.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1447.0,923.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.064197,42.367494]}},{"type":"Feature","properties":{"resourceCoords":[904.0,271.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.066112,42.368121]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0091","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"62.0,1949.0 60.4,1532.8 -0.0,1529.8 -0.0,832.1 1141.5,817.4 1138.0,375.4 1307.3,374.2 1313.5,522.2 1333.3,1629.1 137.6,1640.8 138.1,1949.0 62.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07272542546427,42.36894348127619]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06921242225792,42.370221123106184]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.06715668729179,42.36709190796787]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.07066969049814,42.365814266137875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p92","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0092","type":"ImageService3","width":1647,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1499.8,0.0 1483.8,1464.5 1647.0,1466.7 1647.0,1629.1 9.5,1609.2 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[943.0,377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.067448,42.370131]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,1627.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0648839,42.3685637]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p93","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0093","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1628.0,137.1 1628.0,1865.5 150.8,1868.5 151.9,1949.0 101.0,1949.0 107.8,133.8 1628.0,137.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[101.0,1098.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.065035,42.371887]}},{"type":"Feature","properties":{"resourceCoords":[101.0,1868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.066709,42.371275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p94","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0094","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1653.0,217.7 1645.9,1850.0 371.7,1843.2 371.4,1678.3 209.1,1680.7 206.6,181.3 368.3,185.1 368.1,131.5 1028.0,134.0 1028.0,200.8 1653.0,217.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1028.0,1089.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.062519,42.368102]}},{"type":"Feature","properties":{"resourceCoords":[1028.0,134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.060423,42.368865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p95","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0095","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.4,1909.7 33.0,45.5 -0.0,37.2 1628.0,47.1 1628.0,1909.7 48.4,1909.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[849.0,46.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.058076,42.372827]}},{"type":"Feature","properties":{"resourceCoords":[442.0,46.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.058507,42.373474]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0096","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1023.0,1882.1 365.4,1895.3 366.5,1949.0 205.3,1949.0 204.3,1899.1 246.2,1898.1 214.2,109.8 329.0,107.7 328.2,68.5 1611.1,34.5 1621.2,1949.0 1024.2,1949.0 1023.0,1882.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05731623022156,42.371993712467265]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05561018327866,42.36927360439967]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0599208368525,42.367776982884216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0616268837954,42.37049709095181]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0097","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1574.0,-0.0 1558.7,1919.5 141.1,1894.5 -0.0,1949.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05560577705712,42.376919419193584]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05381942824725,42.37428153406323]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05806426313003,42.372690511933556]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05985061193991,42.37532839706391]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0098","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.2,-0.0 1410.2,-0.0 1419.2,1907.4 939.9,1909.6 940.0,1949.0 824.5,1949.0 824.5,1909.7 59.3,1912.6 53.2,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05396954777825,42.374442765547364]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05220429418986,42.37176159580215]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.0564533831798,42.37021308743111]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05821863676819,42.37289425717633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1950 | sanborn03985_052 p99","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T07:17:22Z","modified":"2026-09-21T07:17:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0099","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1628.0,1912.7 -0.0,1918.9 0.0,-0.0 1628.0,-0.0 1628.0,1912.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985195003:03985_03_1950-0099/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05242010473594,42.37217155316171]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05064602356885,42.36954153751475]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05490401601185,42.36797102352727]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.05667809717895,42.370601039174225]}},{"type":"Feature","properties":{"resourceCoords":[220.0,1920.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.056375,42.370269]}}]}}]}