{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04157_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Pontiac, Michigan | 1903 | 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":"27"},{"label":"placed","value":"14"},{"label":"unplaced","value":"13"},{"label":"fit sources","value":"georef-snap 8, georef 5, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 18 panels"},{"label":"unplaced pages","value":"p10 (tier 1, 42.63319,-83.29141 +/-259m); p12__2 (tier 1, 42.63015,-83.29060 +/-265m); p13__3 (tier 1, 42.62867,-83.28359 +/-177m); p14__1 (tier 1, 42.63148,-83.29741 +/-100m); p14__3 (tier 1, 42.63068,-83.29684 +/-100m); p16__1 (tier 1, 42.64433,-83.27978 +/-100m); p16__2 (tier 1, 42.62509,-83.31550 +/-100m); p16__3 (tier 1, 42.62539,-83.31493 +/-100m); p16__4 (tier 1, 42.64447,-83.27927 +/-100m); p16__5 (tier 1, 42.64430,-83.27961 +/-102m); p4__2 (tier 1, 42.64177,-83.29417 +/-100m); p9__1 (tier 1, 42.63890,-83.31354 +/-101m); p9__3 (tier 1, 42.63880,-83.31422 +/-196m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"267.2,237.0 1.0,939.2 1.0,1847.7 1112.9,1903.7 1596.0,1869.7 1563.4,728.6 1627.0,290.1 1627.0,286.7 1550.8,77.5 955.9,20.2 787.8,89.9 577.8,89.4 80.9,25.4 31.8,74.2 56.3,204.3 94.8,252.3 187.4,239.7 267.2,237.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1236.0,1897.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29041654645495,42.63248791235677]}},{"type":"Feature","properties":{"resourceCoords":[1306.0,214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.28600766672442,42.632359975391225]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p12 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.32"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3928.4"},{"label":"split_canvas_w","value":"3490.4"},{"label":"split_canvas_h","value":"3779.6"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"827.3,1701.6 839.0,1338.5 641.1,1084.7 215.1,1005.0 41.5,1119.8 58.6,1794.3 133.7,1869.0 733.9,1848.2 827.3,1701.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,982.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.29085462196814,42.629104971085006]}},{"type":"Feature","properties":{"resourceCoords":[872.6,982.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.28861910174197,42.629027792928945]}},{"type":"Feature","properties":{"resourceCoords":[872.6,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.28873185476829,42.627234794437726]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.29096737499445,42.62731197259379]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p13 [1]","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":"6512.0"},{"label":"split_canvas_h","value":"3930.8"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1618.8,522.9 1598.2,506.9 1599.9,394.1 1584.0,60.2 58.2,61.5 35.6,229.1 57.1,860.6 154.3,975.2 534.0,957.2 534.0,926.5 534.0,926.2 1186.7,926.2 1315.9,920.1 1440.2,926.2 1517.0,926.2 1618.8,522.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1215.0,495.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.28464928043078,42.62882942701142]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,495.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.28370183660309,42.628862365816886]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p13 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"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":"3706.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"2502.8"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"265.0,1019.0 173.9,1425.2 97.0,1427.3 59.0,1499.6 131.4,1545.1 197.4,1546.5 206.2,1473.3 344.1,1549.5 1466.8,1550.5 1438.8,1484.0 1505.0,1478.0 1521.8,1016.3 1199.8,973.0 265.0,1019.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[895.0,1003.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2820631,42.628867]}},{"type":"Feature","properties":{"resourceCoords":[244.0,1003.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2836899,42.6288424]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0014__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p14 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.55"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4302.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2210.0"},{"label":"split_canvas_h","value":"2296.0"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0014__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.8,87.5 1476.8,22.4 1100.6,27.1 1085.5,532.5 1620.8,565.8 1621.1,565.8 1611.8,87.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0014__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1075.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.30235345049616,42.632218439796034]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.30113226701235,42.63276199169863]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,574.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.30036576106245,42.631828995371656]}},{"type":"Feature","properties":{"resourceCoords":[1075.5,574.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.30158694454626,42.63128544346906]}},{"type":"Feature","properties":{"resourceCoords":[1565.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.3011897,42.6325988]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1460.1,60.1 1466.2,53.9 1519.2,1.0 1005.0,1.0 889.8,38.2 285.6,34.9 291.3,135.2 27.0,319.2 54.6,1862.5 1138.3,1900.8 1567.7,1888.8 1625.3,1158.8 1502.3,726.1 1602.6,582.9 1610.3,330.8 1627.0,298.1 1627.0,294.7 1460.1,60.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[299.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29992270497452,42.64270901601029]}},{"type":"Feature","properties":{"resourceCoords":[299.0,47.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29816680800296,42.644082446088596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.70"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"440.9,1420.6 373.9,1497.5 51.5,1443.5 63.2,1431.1 74.7,69.3 1053.2,37.2 1124.3,103.8 1551.2,126.4 1553.2,203.1 1451.3,206.1 1501.8,1411.3 1559.3,1410.5 1445.9,1926.0 1026.8,1926.0 877.4,1851.7 440.9,1420.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1355.0,16.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29592441188845,42.646764364754986]}},{"type":"Feature","properties":{"resourceCoords":[83.0,16.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29914457604904,42.646719239927506]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p3","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"95.2,1211.0 152.9,1211.9 1.0,1816.6 1.0,1887.7 629.0,1865.2 631.6,1878.1 1614.4,1787.8 1577.0,1643.7 1624.8,364.6 1551.8,69.8 1336.0,15.6 182.5,83.2 182.8,1.0 80.4,1.0 95.2,1211.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[577.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2942711,42.644202]}},{"type":"Feature","properties":{"resourceCoords":[1170.0,310.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2928888,42.6459378]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"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":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.6,57.2 103.5,1022.7 90.6,1022.8 1.0,1574.0 1.0,1834.7 153.5,1736.9 137.1,1811.6 135.3,1820.1 398.9,1926.0 423.1,1926.0 434.8,1892.7 797.4,1887.7 1042.1,1794.2 1122.3,1522.0 1136.5,1458.6 1137.0,1458.6 1477.8,1438.8 1486.2,1457.2 1491.1,1457.2 1513.8,1457.1 1559.5,1043.8 1521.4,1043.9 1527.3,497.7 1536.6,497.7 1571.3,123.7 875.0,19.2 205.6,57.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1166.0,1199.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29382859031132,42.64095977518728]}},{"type":"Feature","properties":{"resourceCoords":[1469.0,1031.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29322200233328,42.64048259883437]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p5","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"57.8,1337.8 138.8,1520.2 133.4,1800.5 352.8,1812.5 368.0,1868.3 501.9,1895.3 1581.5,1906.1 1577.5,1926.0 1599.5,1926.0 1599.4,1886.5 1598.7,1692.3 1595.8,923.0 1587.0,93.8 1014.2,89.7 878.8,60.6 617.7,61.1 568.6,73.4 557.9,52.2 546.7,23.8 373.0,1.0 268.0,1.0 267.4,11.3 197.6,1.0 151.3,1.0 114.3,375.2 105.0,375.1 95.8,923.3 133.9,923.4 85.5,1337.9 57.8,1337.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[307.0,1479.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2944616,42.6397363]}},{"type":"Feature","properties":{"resourceCoords":[954.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2905796,42.6392156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1543.2,21.3 1625.0,257.6 1603.7,1895.4 42.4,1878.3 49.7,259.4 70.6,255.3 63.0,217.7 38.7,97.7 569.4,122.4 579.8,172.6 689.5,117.0 1411.8,12.7 1410.3,48.3 1542.8,20.4 1543.2,21.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1488.0,1040.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29660094204681,42.63434938965771]}},{"type":"Feature","properties":{"resourceCoords":[390.0,1872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29894880377454,42.636383639568116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0007","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1430.1,1890.5 1421.0,1926.0 1531.8,1926.0 1560.2,1926.0 1533.4,1713.8 1625.9,1123.5 1615.2,475.7 1627.0,479.4 1627.0,1.0 587.8,1.0 560.6,24.1 522.8,31.2 38.6,23.5 37.8,850.1 31.6,1617.0 31.1,1684.7 559.5,1822.2 559.4,1874.8 681.5,1842.2 1430.1,1890.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[65.0,864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29228256893533,42.63759491628721]}},{"type":"Feature","properties":{"resourceCoords":[1072.0,308.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29023556562902,42.63603527344602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1061.5,1895.9 1594.6,1634.8 1608.1,1633.8 1627.0,1633.0 1627.0,1623.9 1595.7,1616.5 1545.0,1114.4 1622.6,827.9 1608.1,327.4 1537.6,114.2 1200.6,34.4 737.5,21.6 472.4,118.8 291.6,111.0 214.9,42.5 1.0,74.3 1.0,78.3 20.4,170.3 34.8,354.2 9.1,371.2 12.8,432.0 67.8,689.5 67.4,829.1 182.8,1395.0 282.1,1874.5 297.4,1910.2 318.3,1926.0 1058.1,1926.0 1061.5,1895.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[161.0,1371.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.29027880629972,42.638098234616855]}},{"type":"Feature","properties":{"resourceCoords":[1098.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.28798762187554,42.639538551700156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pontiac, Michigan | 1903 | sanborn04157_004 p9 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.11"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2976.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3536.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T13:04:59Z","modified":"2026-10-19T13:04:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"744.0,451.8 744.0,762.5 744.0,903.0 744.0,914.5 869.0,914.5 869.0,1250.3 869.0,1590.8 1568.3,1798.8 1563.1,1749.9 1559.7,1718.6 1540.2,1626.2 1585.7,1583.8 1568.8,1588.3 1567.8,77.7 1262.8,41.4 1245.5,53.1 1232.5,55.7 744.0,368.6 744.0,403.7 744.0,451.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041571903:04157_1903-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1572.0,17.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2857367,42.6377502]}},{"type":"Feature","properties":{"resourceCoords":[1572.0,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.2860706,42.6342963]}}]}}]}