{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03992_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"East Detroit, Michigan | 1931 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"21"},{"label":"placed","value":"17"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef-snap 12, georef 4, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 9 panels"},{"label":"unplaced pages","value":"p10__1 (tier 1, 42.46355,-82.96084 +/-259m); p10__2 (tier 1, 42.46138,-82.95967 +/-103m); p7__1 (tier 2, 42.46183,-82.95815 +/-1363m); p7__2 (tier 1, 42.46548,-82.95575 +/-193m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p11 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1673.6 1.0,1753.7 753.5,1899.9 1548.9,1896.4 1582.7,1875.0 1579.0,1655.1 1580.7,1209.2 1574.9,629.9 1574.5,106.4 1554.4,69.4 1532.1,104.8 1506.8,66.8 1021.2,54.5 776.0,51.5 735.6,51.0 704.0,50.7 597.0,47.2 510.0,119.5 510.0,516.2 510.0,516.2 415.7,697.8 383.0,760.8 383.0,1169.6 314.9,1301.6 262.0,1404.0 1.0,1404.0 1.0,1590.1 18.2,1630.3 1.0,1673.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1560.0,1254.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95617059238158,42.46238499198429]}},{"type":"Feature","properties":{"resourceCoords":[384.0,904.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95919206548666,42.46299387004942]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p11 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2040.0"},{"label":"split_canvas_h","value":"5616.0"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"509.0,60.6 476.7,28.2 465.9,1.0 12.9,1.0 12.0,11.0 1.0,11.0 1.0,1298.5 194.1,1377.6 274.4,1380.0 302.2,1319.8 340.7,751.4 453.6,529.9 456.2,201.1 509.0,191.1 509.0,60.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[416.0,402.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96060030686078,42.461082996870445]}},{"type":"Feature","properties":{"resourceCoords":[416.0,1374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96144678976667,42.459403071275936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.8,1678.4 53.3,1218.5 52.3,620.9 56.2,80.9 87.4,51.6 124.3,52.8 359.7,89.6 524.3,28.1 918.9,14.4 919.2,41.0 1254.6,36.5 1364.5,40.7 1557.5,37.0 1576.0,107.1 1576.2,1391.8 1574.0,1893.8 105.2,1870.7 49.7,1905.2 47.8,1678.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[466.0,1211.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95510022483201,42.4625071141644]}},{"type":"Feature","properties":{"resourceCoords":[1564.0,1392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95237042368804,42.46223861207554]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1003.1,1900.9 349.9,1820.2 303.9,1886.2 63.2,1925.8 60.5,1420.3 47.7,126.8 28.4,56.4 754.9,44.4 959.0,41.5 1562.8,30.9 1565.9,102.9 1573.0,1368.3 1578.7,1901.3 1003.1,1900.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[65.0,1396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95233050606187,42.462283840787286]}},{"type":"Feature","properties":{"resourceCoords":[1558.0,1365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94866336392937,42.46239715749198]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.6,1363.5 53.4,126.7 51.0,56.3 436.4,54.8 872.2,49.4 872.5,16.1 1411.8,66.8 1512.5,106.2 1595.7,246.9 1570.9,1810.3 1503.5,1873.8 1270.1,1896.0 50.7,1884.5 49.6,1363.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[448.0,1367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94762479844061,42.46240729335806]}},{"type":"Feature","properties":{"resourceCoords":[56.0,1367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94861006996878,42.46238565339646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.0,444.0 112.2,88.4 1240.4,25.1 1627.0,97.6 1627.0,1880.3 1133.8,1848.0 1133.5,1789.0 715.8,1809.8 715.8,1801.1 304.5,1805.3 304.5,1825.5 13.6,1849.8 39.0,444.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[712.0,1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9658652654075,42.46255851961739]}},{"type":"Feature","properties":{"resourceCoords":[293.0,1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96690791476833,42.462511504533666]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0016","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"305.6,156.6 305.4,136.7 709.6,129.4 709.6,138.0 1120.2,114.3 1120.8,172.2 1627.0,201.4 1627.0,1531.3 1627.0,1582.6 1627.0,1614.5 1539.8,1926.0 1534.5,1926.0 1529.0,1926.0 1539.6,1848.3 674.0,1831.1 604.7,1776.9 121.1,1772.8 80.6,1720.1 14.9,648.0 19.7,182.8 305.6,156.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[296.0,994.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96670448949263,42.45990912770393]}},{"type":"Feature","properties":{"resourceCoords":[686.0,1516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96564646118391,42.458972619751854]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p17 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2274.0"},{"label":"split_canvas_h","value":"2822.8"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"258.9,676.5 341.4,612.9 369.2,665.1 527.4,676.6 537.3,641.8 533.8,46.4 262.8,38.5 62.9,106.1 107.1,349.4 25.1,647.8 258.9,676.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[87.9,641.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9579356,42.4551833]}},{"type":"Feature","properties":{"resourceCoords":[527.5,641.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9568392,42.4552068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p17 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.20"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2207.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4304.8"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"625.0,917.6 638.0,1020.4 593.0,1403.2 681.1,1521.2 646.5,1638.9 714.7,1845.2 1298.4,1880.8 1541.5,1800.3 1595.4,678.8 1581.9,94.6 1505.8,111.6 1493.7,50.2 1385.8,20.5 1130.7,39.6 1098.7,1.0 1097.2,1.0 1072.0,45.8 987.0,40.2 900.4,1.0 568.5,1.0 567.1,166.9 564.3,500.6 589.8,565.9 624.9,916.5 614.0,920.8 614.3,921.8 625.0,917.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1130.4,1315.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9625926,42.4573577]}},{"type":"Feature","properties":{"resourceCoords":[1130.4,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9616555,42.4594466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p17 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.18"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2822.8"},{"label":"split_canvas_w","value":"2250.0"},{"label":"split_canvas_h","value":"4885.2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"529.7,950.4 461.2,769.1 59.5,895.1 28.9,1063.6 30.9,1738.2 207.2,1866.4 500.5,1855.2 530.4,1748.3 529.7,950.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0017__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,705.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96773008226864,42.45185176955414]}},{"type":"Feature","properties":{"resourceCoords":[562.5,705.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96673204152687,42.45148708430027]}},{"type":"Feature","properties":{"resourceCoords":[562.5,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96779729608784,42.44987740746961]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96879533682961,42.450242092723485]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p2","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.66"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"27.3,321.8 66.1,72.7 1533.0,48.2 1595.5,481.5 1576.5,1882.4 1261.7,1813.8 1077.8,1878.3 43.8,1869.7 27.3,321.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1098.0,820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9490016,42.4787158]}},{"type":"Feature","properties":{"resourceCoords":[840.0,1342.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9496341,42.4777519]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1485.9,1926.0 1444.0,1926.0 1444.7,1905.2 1393.6,1889.9 61.1,1887.9 62.0,57.8 1548.5,47.0 1592.8,319.7 1565.0,318.7 1560.7,904.2 1559.9,1410.0 1546.5,1403.3 1485.9,1926.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[564.0,789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95175522105835,42.47404688878094]}},{"type":"Feature","properties":{"resourceCoords":[-155.0,426.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95087089417859,42.47537994951784]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p4","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.05"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"116.7,1.0 90.8,1.0 107.2,542.1 123.9,1010.3 111.3,1004.5 47.8,1817.8 92.5,1891.6 708.3,1835.5 1015.0,1895.7 1577.8,1888.4 1597.4,233.1 1553.3,98.5 1458.5,100.9 1416.1,34.2 975.0,24.9 740.3,132.5 143.5,133.8 116.7,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9519665,42.4709137]}},{"type":"Feature","properties":{"resourceCoords":[1390.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9549078,42.4697082]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1547.0,1856.0 1477.4,1854.7 1493.6,1090.9 1495.9,1091.0 1461.0,828.2 1341.8,795.4 1470.0,339.3 1535.6,101.5 1524.2,102.8 1238.5,15.4 293.9,31.8 132.9,105.3 38.0,229.9 76.5,1313.7 26.1,1782.4 1.0,1779.3 1.0,1926.0 1553.8,1926.0 1547.0,1856.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[442.0,550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96252379842457,42.46704573719163]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96026740067512,42.466593259369674]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.1,1079.8 131.6,1852.2 201.9,1853.0 209.6,1926.0 561.9,1926.0 636.2,1860.1 746.9,1860.1 821.2,1858.6 1074.8,1853.6 1576.8,1850.2 1551.7,1815.0 1590.1,1170.4 1526.6,719.3 1597.9,429.9 1557.8,97.0 1528.3,112.1 1372.0,32.1 712.9,16.1 177.0,79.1 112.5,320.1 1.0,728.6 1.0,786.1 107.1,814.5 144.4,1079.9 142.1,1079.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[-22.0,795.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.96029885781479,42.466567545135945]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,203.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9560794012998,42.46761689162717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1826.2 1.0,1853.0 338.0,1852.7 448.6,1858.3 643.1,1857.0 1370.2,1861.1 1497.9,1862.2 1519.7,513.9 1522.6,513.9 1513.0,51.6 1497.8,54.0 134.3,47.1 36.0,251.6 57.3,1825.0 1.0,1826.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[969.0,250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95186106743414,42.467645210765845]}},{"type":"Feature","properties":{"resourceCoords":[1238.0,504.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.95117399367341,42.46720654548192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Detroit, Michigan | 1931 | sanborn03992_001 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:25:16Z","modified":"2026-10-19T18:25:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"439.9,15.1 1434.6,63.8 1573.2,140.2 1600.0,1807.5 1627.0,1809.7 1627.0,1814.6 1627.0,1843.5 1185.2,1853.6 794.5,1859.2 196.2,1870.7 120.3,1871.9 109.8,536.5 112.7,536.5 92.2,79.0 439.9,15.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114em:g039921931:03992_1931-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[776.0,525.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94883056409012,42.46725540695878]}},{"type":"Feature","properties":{"resourceCoords":[1173.0,525.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9478461704074,42.46726944183382]}}]}}]}