{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04287_012.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Duluth, Minnesota | 1955 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"90"},{"label":"placed","value":"56"},{"label":"unplaced","value":"34"},{"label":"fit sources","value":"georef 45, georef-snap 9, georef-street 1, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"12 sheet(s) cut into 26 panels"},{"label":"unplaced pages","value":"p0 (tier 1, 46.77167,-92.12091 +/-259m); p26 (tier 2, 46.76177,-92.12656 +/-108m); p28__2 (tier 1, 46.79688,-92.10193 +/-107m); p31__1 (tier 3, 46.75348,-92.12630 +/-528m); p31__2 (tier 3, 46.75348,-92.12630 +/-528m); p38 (tier 2, 46.77704,-92.11132 +/-110m); p39 (tier 1, 46.78179,-92.10389 +/-261m); p3__1 (tier 2, 46.77707,-92.12249 +/-2547m); p41 (tier 1, 46.78197,-92.10142 +/-525m); p42 (tier 3, 46.78006,-92.13602 +/-528m); p43 (tier 1, 46.77099,-92.12600 +/-100m); p45__1 (tier 1, 46.76135,-92.13247 +/-186m); p45__2 (tier 1, 46.76497,-92.13697 +/-168m); p45__3 (tier 2, 46.76879,-92.11744 +/-100m); p46 (tier 3, 46.76807,-92.10611 +/-528m); p47 (tier 1, 46.76869,-92.11422 +/-264m); p48 (tier 2, 46.77203,-92.11313 +/-100m); p49__1 (tier 2, 46.77976,-92.11747 +/-100m); p49__2 (tier 2, 46.77976,-92.11747 +/-100m); p50 (tier 3, 46.76736,-92.11072 +/-528m); p51 (tier 4, 46.76802,-92.12891 +/-5902m); p52__1 (tier 3, 46.73979,-92.15180 +/-528m); p52__2 (tier 3, 46.73979,-92.15180 +/-528m); p54 (tier 2, 46.76109,-92.10661 +/-100m); p55 (tier 3, 46.75781,-92.10498 +/-528m); p56 (tier 3, 46.74519,-92.15591 +/-528m); p57 (tier 4, 46.76802,-92.12891 +/-5902m); p59__1 (tier 2, 46.74664,-92.15796 +/-224m); p59__2 (tier 2, 46.74664,-92.15796 +/-224m); p63 (tier 2, 46.74447,-92.15437 +/-100m); p67__1 (tier 2, 46.75323,-92.13332 +/-1921m); p67__2 (tier 1, 46.75370,-92.14935 +/-202m); p68 (tier 1, 46.75770,-92.13668 +/-266m); p69__2 (tier 1, 46.74932,-92.16718 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p1","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0001","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 828.5,0.0 829.3,218.3 910.9,259.1 1504.1,274.2 1507.1,0.0 1594.7,0.0 1594.5,300.1 1665.0,543.9 1665.0,1691.4 1436.3,1700.2 1435.3,1663.0 239.0,1675.2 242.3,2018.0 -0.0,2018.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[916.0,1308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.136744,46.7694724]}},{"type":"Feature","properties":{"resourceCoords":[1596.0,1842.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1343936,46.769734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0010","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1612.3 -0.0,1246.3 -0.0,1099.0 -0.0,0.0 1370.3,0.0 1665.0,687.8 1665.0,1377.0 1665.0,1605.2 1516.7,1782.7 820.4,2018.0 559.0,2018.0 128.2,2018.0 -0.0,1612.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[123.0,1244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1173394,46.7798367]}},{"type":"Feature","properties":{"resourceCoords":[123.0,702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1184152,46.780505]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p11","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0011","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1319.8 -0.0,-0.0 1395.6,0.0 1415.8,1846.4 843.2,1864.9 839.2,1684.4 293.7,1681.4 292.8,772.0 134.0,772.0 144.3,1319.3 -0.0,1319.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[826.0,772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.114697,46.7833487]}},{"type":"Feature","properties":{"resourceCoords":[134.0,772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1159554,46.7824008]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p12","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0012","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,0.0 1665.0,1847.3 1665.0,2018.0 201.8,2018.0 204.4,1861.2 -0.0,1863.6 -0.0,0.0 1665.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[800.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1111248,46.7845822]}},{"type":"Feature","properties":{"resourceCoords":[800.0,1869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1100306,46.783916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p13 [1]","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"26"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1278.1 223.6,1517.5 376.2,1379.7 465.0,1355.3 565.2,1361.0 547.3,2018.0 946.5,2018.0 940.3,1702.3 1002.2,1794.9 988.9,1701.7 1010.0,1707.5 879.0,1615.5 790.8,1478.5 779.8,805.2 1072.2,800.5 1308.0,1053.2 1390.0,976.8 1377.1,28.1 1665.0,24.3 1665.0,0.0 0.0,0.0 -0.0,123.5 342.6,110.5 364.4,682.9 325.2,640.5 193.7,776.9 376.6,1004.4 240.7,1009.5 235.4,996.5 240.1,1139.5 -0.0,1133.2 -0.0,1278.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1122.0,855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1403077,46.7610656]}},{"type":"Feature","properties":{"resourceCoords":[650.0,339.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1440651,46.7610668]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p13 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"4200.4"},{"label":"split_canvas_y","value":"4424.0"},{"label":"split_canvas_w","value":"2459.6"},{"label":"split_canvas_h","value":"3648.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1526.4,2018.0 1665.0,2018.0 1489.8,1786.2 1626.8,1645.3 1665.0,1690.0 1665.0,1106.5 1050.1,1106.0 1050.3,1556.7 1366.7,1575.1 1526.4,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1325.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1464823,46.7594164]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1440499,46.7594352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p14","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0014","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1468.9,1891.6 502.4,1849.5 306.7,1745.6 171.9,1623.5 -0.0,1346.6 0.0,0.0 584.9,0.0 1048.0,513.0 1214.5,363.0 1214.3,462.6 1290.5,462.9 1288.4,772.5 1489.5,779.8 1468.9,1891.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1486.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1364326,46.7606935]}},{"type":"Feature","properties":{"resourceCoords":[1048.0,513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1388475,46.7610805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p15","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0015","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,480.1 568.4,477.8 1103.6,0.0 1435.0,0.0 1434.2,251.7 1568.0,251.5 1564.7,1866.6 186.0,1891.7 198.9,792.1 -0.0,786.3 -0.0,480.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[833.0,252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1374666,46.7629142]}},{"type":"Feature","properties":{"resourceCoords":[1568.0,252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1361315,46.7639328]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0016","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.1,442.0 1446.3,449.1 1446.6,447.2 1533.3,447.6 1535.8,1865.6 1351.1,1868.0 1351.3,1714.3 840.7,1713.3 842.3,1874.6 145.0,1858.0 151.1,442.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1534.0,1323.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1314537,46.7644859]}},{"type":"Feature","properties":{"resourceCoords":[145.0,1858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1328695,46.7619198]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p17","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0017","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1548.9,1799.0 160.6,1819.1 145.2,185.4 844.9,166.9 1536.6,200.3 1548.9,1799.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[150.0,720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1325567,46.7651691]}},{"type":"Feature","properties":{"resourceCoords":[848.0,1806.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1291446,46.7647706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p18","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0018","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.1,1804.1 129.4,199.5 835.2,164.7 833.5,0.0 1386.7,0.0 1386.8,151.8 1483.8,149.6 1529.9,148.5 1530.0,1799.0 133.1,1804.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[830.0,1258.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1277252,46.7673455]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,1799.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1253988,46.7676319]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p19","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0019","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 798.4,0.0 991.8,162.8 1247.9,173.1 1298.7,153.5 1421.6,184.3 1419.6,1815.4 140.5,1820.4 142.0,183.0 -0.0,186.1 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1286704,46.7696565]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1229037,46.7695417]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p2","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0002","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,0.0 1648.2,1585.0 235.6,1752.3 142.9,586.5 51.5,344.5 24.9,0.0 1665.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[800.0,1304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1342746,46.7713406]}},{"type":"Feature","properties":{"resourceCoords":[800.0,490.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.13577,46.7724458]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0020","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,0.0 1665.0,1826.5 1361.4,1827.3 1362.6,1940.3 1183.8,1827.2 -0.0,1826.9 -0.0,344.3 88.8,539.9 197.4,563.3 314.9,0.0 1665.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.12668309759873,46.77160751164918]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.12375291272069,46.773858703458025]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11979712371307,46.77140914250027]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.12272730859111,46.76915795069142]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0021","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1429.3,403.4 1425.5,727.9 1616.3,728.0 1607.6,1228.2 1430.8,1499.2 1539.6,1675.9 31.9,1569.7 22.5,1719.6 -0.0,1719.2 0.0,0.0 41.4,0.0 46.3,410.2 1429.3,403.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11946690731163,46.77719183183088]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11649272778266,46.77946061929842]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11250561336651,46.77697453331984]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11547979289548,46.7747057458523]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0022","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,728.9 -0.0,455.5 -0.0,406.1 0.0,0.0 866.1,0.0 1560.8,159.9 1665.0,1984.6 1665.0,1984.6 1665.0,2018.0 1127.2,2018.0 271.7,1810.0 31.7,1567.2 -0.0,728.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11691477600033,46.7791521160859]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11388505974006,46.78140855790423]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10991949874285,46.77887614037363]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11294921500313,46.77661969855531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p23","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0023","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1429.0,2018.0 -0.0,2018.0 -0.0,728.1 178.8,724.9 164.0,0.0 872.9,0.0 878.0,183.0 1665.0,155.2 1665.0,1638.8 1631.7,1639.2 1470.0,1806.8 1426.9,1808.4 1429.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[878.0,724.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1114171,46.7813429]}},{"type":"Feature","properties":{"resourceCoords":[878.0,183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1124793,46.7820114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p24","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0024","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,2018.0 -0.0,2018.0 0.0,-0.0 1665.0,-0.0 1665.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1540.0,715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0999294,46.7931503]}},{"type":"Feature","properties":{"resourceCoords":[1545.0,1256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1011725,46.7921954]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p25","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0025","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"123.0,1694.1 115.2,116.6 986.0,126.0 986.1,282.2 1665.0,273.8 1665.0,1694.1 123.0,1694.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[673.0,817.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1280275,46.7640918]}},{"type":"Feature","properties":{"resourceCoords":[986.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1261715,46.7646534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p27","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0027","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.7,1895.3 160.6,506.7 -0.0,508.6 0.0,-0.0 1665.0,-0.0 1665.0,511.4 1485.6,511.3 1478.7,1747.7 1012.7,1752.2 1013.7,2018.0 697.9,2018.0 697.0,1888.0 145.7,1895.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1012.0,512.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1298829,46.7617993]}},{"type":"Feature","properties":{"resourceCoords":[697.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1329983,46.7602925]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0028__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p28 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0028__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0028","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,512.8 -0.0,2018.0 1056.2,2018.0 1034.0,1214.4 1665.0,1211.4 1665.0,-0.0 176.1,1.8 178.9,511.9 -0.0,512.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0028__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[530.0,1200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1291152,46.759611]}},{"type":"Feature","properties":{"resourceCoords":[530.0,510.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.12786,46.7605591]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p29","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0029","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"70.6,1920.3 124.6,1736.5 145.3,1292.0 149.0,136.0 705.5,134.0 705.1,265.2 1023.9,268.3 1025.5,-0.0 1495.8,-0.0 1491.6,274.9 1665.0,277.6 1665.0,2018.0 69.9,2018.0 258.2,1897.3 70.6,1920.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[149.0,1519.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1365652,46.7590592]}},{"type":"Feature","properties":{"resourceCoords":[149.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1341208,46.7609633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p30","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0030","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.6,221.5 1645.3,254.7 1665.0,2018.0 -0.0,2018.0 -0.0,1936.5 164.4,1937.6 157.6,221.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1312476187952,46.759433999162]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1278266142833,46.75740358137694]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.131460464034,46.75459565357152]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.13488146854591,46.75662607135658]}},{"type":"Feature","properties":{"resourceCoords":[532.0,778.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1315555,46.7577027]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p32","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0032","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.8,103.5 1549.4,122.5 1524.1,1105.7 1446.6,1194.0 1665.0,1296.6 1665.0,2018.0 -0.0,2018.0 -0.0,960.2 154.0,962.0 173.8,103.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[846.0,113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1266728,46.7666589]}},{"type":"Feature","properties":{"resourceCoords":[154.0,962.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1261715,46.7646534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p33","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0033","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.8,1176.5 183.1,1068.6 187.4,121.6 1543.0,110.0 1544.0,954.0 1665.0,952.4 1665.0,2018.0 -0.0,2018.0 -0.0,1988.8 340.5,1981.6 325.5,1272.8 108.8,1176.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1544.0,954.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1211791,46.768469]}},{"type":"Feature","properties":{"resourceCoords":[1543.0,110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1229037,46.7695417]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p34","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0034","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1195.2,109.8 1371.9,219.9 1393.8,2018.0 259.1,2018.0 261.2,986.8 136.5,988.2 137.3,118.4 1195.2,109.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[832.0,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1205735,46.7698149]}},{"type":"Feature","properties":{"resourceCoords":[1529.0,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1193198,46.7707622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p35","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0035","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"296.5,109.0 297.7,0.0 1665.0,0.0 1665.0,1889.5 1330.3,1897.7 1327.5,2018.0 -0.0,2018.0 -0.0,108.7 296.5,109.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[840.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1180814,46.7717206]}},{"type":"Feature","properties":{"resourceCoords":[150.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1193198,46.7707622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p36","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0036","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"288.1,6.0 1320.0,0.0 1219.7,1835.9 1665.0,1817.2 1665.0,2018.0 -0.0,2018.0 -0.0,1889.2 330.7,1874.2 288.1,6.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1184854,46.7732876]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1153873,46.7755787]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.111333,46.77300699999999]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1144311,46.7707159]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p37","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"3"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0037","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1411.5,0.0 1536.7,124.4 1665.0,117.5 1665.0,2018.0 433.2,2018.0 424.6,1859.7 -0.0,1899.7 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[862.0,123.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1142908,46.7763031]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,123.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1128635,46.7772489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039a/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p39a","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039a/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039a","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1483.0,206.0 1472.8,1300.8 -0.0,1345.5 -0.0,244.8 1483.0,206.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039a/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1485.0,1845.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.105156,46.7808864]}},{"type":"Feature","properties":{"resourceCoords":[1483.0,206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1067639,46.7819203]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039b/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p39b","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039b/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039b","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,217.5 0.0,0.0 1665.0,0.0 1640.7,2018.0 1582.4,1825.1 208.5,1867.8 191.0,213.0 -0.0,217.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0039b/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[191.0,213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1067639,46.7819203]}},{"type":"Feature","properties":{"resourceCoords":[191.0,1318.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1057005,46.7812219]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p3 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"3247.6"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0003","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 -0.0,738.8 81.5,779.9 674.6,797.2 678.6,523.0 766.2,523.4 767.0,484.4 1665.0,559.5 1665.0,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[82.0,779.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.138879,46.7708054]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,505.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1366061,46.7732765]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p4","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0004","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1665.0,0.0 1665.0,2018.0 1545.8,2018.0 1409.8,1832.6 1370.5,1644.0 882.7,1721.3 662.1,1586.6 -0.0,1725.4 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[-75.0,711.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.13059,46.7712418]}},{"type":"Feature","properties":{"resourceCoords":[728.0,1793.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.127422,46.7705658]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p40","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0040","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,2018.0 -0.0,2018.0 -0.0,165.1 42.7,164.7 204.8,0.0 1665.0,0.0 1665.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[841.0,981.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.105156,46.7808864]}},{"type":"Feature","properties":{"resourceCoords":[1547.0,981.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1038854,46.7818518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0044","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2018.0 -0.0,285.0 -0.0,285.0 0.0,0.0 1665.0,0.0 1665.0,2018.0 -0.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10889564838268,46.78637233595996]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10602400462457,46.78866772311185]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10198971712883,46.78626760003369]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10486136088694,46.7839722128818]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p5","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0005","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1551.1,696.3 1545.2,1533.4 1206.5,1532.0 673.3,2018.0 -0.0,2018.0 -0.0,0.0 1665.0,0.0 1665.0,696.7 1551.1,696.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[982.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1373694,46.7629858]}},{"type":"Feature","properties":{"resourceCoords":[208.0,991.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1403264,46.7628983]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p53","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0053","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,2018.0 0.0,0.0 1665.0,0.0 1665.0,2018.0 0.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.11164383733689,46.761286447032525]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1076334395678,46.76274035307665]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10503137601474,46.759448656919155]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.10904177378382,46.75799475087503]}},{"type":"Feature","properties":{"resourceCoords":[397.0,132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1105174,46.7614178]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p58","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"22"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0058","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,2018.0 -0.0,2018.0 0.0,0.0 1665.0,-0.0 1665.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,117.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1321515,46.8004604]}},{"type":"Feature","properties":{"resourceCoords":[1050.0,117.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1321905,46.7987484]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p6","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0006","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1275.2,328.5 1370.1,329.4 1371.2,1553.6 1448.2,1764.1 1437.5,2018.0 136.1,2018.0 135.8,1801.2 -0.0,1801.7 -0.0,714.5 113.2,714.1 108.2,21.9 0.0,0.0 1278.4,0.0 1275.2,328.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[138.0,714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1382884,46.765272]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,1252.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1347193,46.7665071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p60","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0060","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1448.2,0.0 1446.6,708.2 1665.0,708.4 1665.0,906.4 1458.7,909.0 1460.4,1039.8 19.5,1032.3 -0.0,0.0 1448.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1157.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1560194,46.7511167]}},{"type":"Feature","properties":{"resourceCoords":[445.0,441.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1596967,46.749908]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p61","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0061","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 141.2,0.0 381.8,254.1 138.6,485.0 338.8,697.2 1069.5,0.0 1665.0,0.0 1665.0,810.0 1456.5,809.4 1469.0,2018.0 -0.0,2018.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0061/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[830.0,1249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1636692,46.7470654]}},{"type":"Feature","properties":{"resourceCoords":[1187.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1633759,46.748689]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p62 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4458.0"},{"label":"split_canvas_w","value":"2842.8"},{"label":"split_canvas_h","value":"3614.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"85.4,1625.9 -0.0,1626.3 -0.0,1858.1 297.7,1854.8 294.4,1268.0 82.8,1269.5 85.4,1625.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[229.9,1622.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1438057,46.7512746]}},{"type":"Feature","properties":{"resourceCoords":[229.9,1877.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1427194,46.7505478]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p62 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,788.0 220.8,787.6 221.2,987.8 429.3,984.6 429.6,1058.0 791.3,1058.2 791.0,1719.0 1173.0,1715.9 1173.3,2018.0 1410.9,2018.0 1412.0,779.0 1665.0,777.4 1665.0,0.0 -0.0,0.0 -0.0,788.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0062__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1153.0,1596.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1476072,46.7528619]}},{"type":"Feature","properties":{"resourceCoords":[70.0,1333.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1526031,46.7506919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p64","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0064","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,67.1 1474.2,49.7 1479.1,589.9 1665.0,587.8 1665.0,2018.0 -0.0,2018.0 -0.0,67.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0064/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15616459720069,46.74548303881448]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15301569956459,46.747680151639415]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14915686189757,46.74504643989112]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15230575953366,46.74284932706618]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0065","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,514.8 914.5,508.4 915.1,0.0 1665.0,0.0 1665.0,1378.8 -0.0,1361.1 -0.0,514.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15017572774114,46.75037505613715]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14707730462608,46.75261284630036]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14314662374142,46.750021615210166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14624504685648,46.74778382504696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0066","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,0.0 1665.0,2018.0 -0.0,2018.0 -0.0,0.0 1665.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14489930812607,46.74911360873206]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14180591245012,46.75132900765689]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.13791461503055,46.748741945657486]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14100801070651,46.74652654673265]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0069__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p69 [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":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0069__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0069","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,2018.0 1665.0,0.0 496.6,0.0 492.2,310.1 0.0,592.2 -0.0,2018.0 678.7,2018.0 187.2,1554.3 380.9,1349.1 1080.0,1348.0 1082.1,2018.0 1665.0,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0069__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[578.0,1348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1705459,46.7484033]}},{"type":"Feature","properties":{"resourceCoords":[1080.0,1348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1691967,46.7483983]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p7","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0007","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.5,2018.0 76.0,1768.4 -0.0,1560.0 -0.0,347.6 152.9,349.1 153.2,0.0 1371.8,0.0 1397.8,1825.0 850.0,1795.0 156.0,1809.0 151.8,2018.0 65.5,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[151.0,718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1358243,46.7671704]}},{"type":"Feature","properties":{"resourceCoords":[850.0,1795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1323953,46.7667965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0070","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1394.2,0.0 1428.3,1461.7 51.3,1478.1 51.3,2018.0 -0.0,2018.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15898807527553,46.747275082206706]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15580826928219,46.74949341338535]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15191200118953,46.746833962201315]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.15509180718287,46.74461563102267]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p71","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0071","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1477.6 0.0,1.8 1560.4,0.0 1563.0,413.0 1665.0,413.4 1665.0,2018.0 84.2,2018.0 89.7,1480.6 -0.0,1477.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[848.0,413.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1539393,46.7497379]}},{"type":"Feature","properties":{"resourceCoords":[1563.0,413.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1526031,46.7506919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p72","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0072","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1571.2,159.7 1541.3,2018.0 192.9,2018.0 209.8,694.7 105.0,693.0 107.7,268.6 -0.0,267.2 0.0,0.0 842.0,0.0 840.2,148.4 1571.2,159.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[823.0,1236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1502729,46.7509683]}},{"type":"Feature","properties":{"resourceCoords":[105.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1526031,46.7506919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0073","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,733.0 1665.0,2018.0 185.5,2018.0 186.1,1785.5 -0.0,1785.1 0.0,0.0 1178.3,0.0 1339.9,365.9 1349.7,528.4 1120.9,526.9 1124.7,664.9 1343.8,888.7 1485.5,754.5 1569.4,729.6 1665.0,733.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14977680186125,46.75560309830814]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14329579035963,46.76026548041386]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.13510554746554,46.75484587432596]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.14158655896716,46.750183492220245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0008","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,1165.8 1562.3,1608.1 1383.5,1603.1 1382.8,1638.4 836.9,1622.4 835.0,1785.2 -0.0,1787.7 11.6,0.0 1665.0,0.0 1665.0,1165.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1349993120331,46.76967711356446]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.1320769391893,46.77202592456419]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.12794976524513,46.769582804723385]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.13087213808893,46.76723399372366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p9 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3393.2"},{"label":"split_canvas_h","value":"2738.0"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 -0.0,684.5 848.3,681.8 848.1,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[119.0,623.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0789388,46.8077438]}},{"type":"Feature","properties":{"resourceCoords":[119.0,98.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0800219,46.8084067]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p9 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3392.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3267.6"},{"label":"split_canvas_h","value":"2727.2"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665.0,-0.0 848.1,0.0 848.3,681.8 1665.0,679.1 1665.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[848.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.09503421499261,46.80035863771376]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.09337710063771,46.79934592761342]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,681.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.0946254096132,46.79840914210458]}},{"type":"Feature","properties":{"resourceCoords":[848.1,681.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.0962825239681,46.799421852204915]}},{"type":"Feature","properties":{"resourceCoords":[1006.1,643.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0958925,46.7992782]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Duluth, Minnesota | 1955 | sanborn04287_012 p9 [3]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2716.4"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"5355.6"}],"created":"2026-09-23T18:45:23Z","modified":"2026-09-23T18:45:23Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1537.9,2018.0 1533.8,1797.9 1365.2,1797.7 1369.5,1617.9 1415.6,1617.8 1419.3,1257.1 1540.5,1256.1 1546.0,722.1 1665.0,721.7 1665.0,679.1 848.3,681.8 0.0,684.5 -0.0,2018.0 1537.9,2018.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd414m:g4144m:g4144dm:g04287195501:04287_01_1955-0009__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[852.0,1797.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1174837,46.778209]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,722.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1184152,46.780505]}}]}}]}