{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03921_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Bay City, Michigan | 1912 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"131"},{"label":"placed","value":"108"},{"label":"unplaced","value":"23"},{"label":"fit sources","value":"georef 68, georef-snap 36, georef-street 2, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"16 sheet(s) cut into 33 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 43.58875,-83.88152 +/-4522m); p10 (tier 1, 43.60889,-83.86182 +/-124m); p110 (tier 2, 43.55957,-83.90126 +/-100m); p111__2 (tier 3, 43.55638,-83.90456 +/-535m); p113__2 (tier 1, 43.59385,-83.86637 +/-102m); p12__2 (tier 1, 43.60763,-83.85986 +/-100m); p14__1 (tier 1, 43.61117,-83.85311 +/-125m); p14__2 (tier 1, 43.61115,-83.85304 +/-100m); p15__1 (tier 1, 43.61242,-83.84638 +/-100m); p15__2 (tier 1, 43.61235,-83.84530 +/-120m); p16__2 (tier 2, 43.61481,-83.84122 +/-196m); p18__2 (tier 1, 43.60511,-83.87192 +/-254m); p1__1 (tier 1, 43.61066,-83.84032 +/-111m); p2 (tier 1, 43.60497,-83.88382 +/-255m); p20__2 (tier 1, 43.60316,-83.88460 +/-110m); p41__2 (tier 1, 43.60998,-83.85823 +/-105m); p5 (tier 2, 43.60337,-83.86277 +/-1958m); p63__2 (tier 1, 43.59118,-83.86991 +/-107m); p64__2 (tier 1, 43.59104,-83.86273 +/-100m); p65__2 (tier 1, 43.58870,-83.88930 +/-100m); p7 (tier 1, 43.60513,-83.87297 +/-215m); p8 (tier 2, 43.59307,-83.88063 +/-2285m); p9__2 (tier 1, 43.60492,-83.86644 +/-184m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p100","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0100","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"126.8,1756.2 -0.0,1709.5 -0.0,158.4 31.1,159.7 34.1,0.0 56.5,0.0 46.9,332.3 1545.1,375.6 1537.0,1794.0 126.8,1756.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1154.0,1234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8882784,43.5698063]}},{"type":"Feature","properties":{"resourceCoords":[1537.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8872523,43.568778]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p101","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0101/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0101","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1408.2,1801.2 998.0,1814.8 1002.1,1682.8 -0.0,1705.0 -0.0,0.0 1053.5,0.0 1052.7,161.8 1464.0,149.6 1408.2,1801.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0101/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.90359744280734,43.56915025445946]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89962186233187,43.569078116615295]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89974080271463,43.565588095731485]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.9037163831901,43.56566023357565]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p102","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0102","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1385.1,1796.6 99.9,1780.5 98.3,1949.0 60.9,1949.0 172.2,154.0 1421.5,162.8 1385.1,1796.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[874.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8982188,43.5658499]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8968918,43.5678489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p103","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0103","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1540.1,0.5 1555.0,1072.3 1621.0,1071.7 1621.0,1682.6 414.9,1701.2 414.4,1701.0 90.7,1706.8 77.8,68.4 1540.1,0.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1334.0,1074.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.893796,43.5669512]}},{"type":"Feature","properties":{"resourceCoords":[488.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8958566,43.5688204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0104","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"453.1,1686.8 57.6,1684.5 66.1,1079.6 -0.0,1079.2 -0.0,12.5 1546.3,60.0 1565.1,1682.7 1602.0,1682.3 1602.0,1949.0 453.9,1949.0 453.1,1686.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89322332604263,43.568910208694675]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88922705562025,43.56888850116079]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88926324884142,43.565340883777]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8932595192638,43.56536259131088]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p105 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4860.8"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.1,1714.1 412.2,1725.2 410.8,1949.0 1215.0,1949.0 1215.1,1055.6 1182.4,1055.1 1195.5,144.2 52.5,104.3 43.1,1714.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[49.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.887384,43.5737123]}},{"type":"Feature","properties":{"resourceCoords":[441.1,1726.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8863174,43.5717113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p105 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"4860.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1624.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1621.0,1789.9 1621.0,1666.0 1621.0,1297.0 1621.0,170.8 1246.0,162.0 1246.0,1781.0 1621.0,1789.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0105__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1246.0,162.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8873288,43.5717146]}},{"type":"Feature","properties":{"resourceCoords":[1246.0,1781.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8872523,43.568778]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p106","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0106","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"36.8,1675.9 -0.0,1675.8 -0.0,43.5 1207.1,53.6 1248.0,48.0 1246.6,0.0 1602.0,0.0 1602.0,1949.0 33.8,1944.1 36.8,1675.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[866.0,1688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8871871,43.5658105]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,48.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8862498,43.5687812]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p107","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0107","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1240.3,1949.0 -0.0,1949.0 -0.0,-0.0 1123.4,0.0 1116.5,129.7 1516.9,125.2 1514.0,1764.0 1227.8,1763.1 1240.3,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1514.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.9002627,43.5648655]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,1764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.90027,43.562875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p108","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0108/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0108","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1759.2 -0.0,120.9 1602.0,125.5 1602.0,1761.6 -0.0,1759.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1169.0,1214.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8972201,43.5638672]}},{"type":"Feature","properties":{"resourceCoords":[1169.0,1760.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8972213,43.5628717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0109/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p109","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0109/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0109","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1233.5,60.6 1233.7,0.0 1276.6,0.0 1255.0,60.6 1593.5,60.8 1590.3,1879.0 1536.8,1877.7 1537.2,1949.0 -0.0,1949.0 -0.0,246.1 955.4,247.3 943.6,60.4 1233.5,60.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0109/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.90333382064048,43.562989850771984]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89930723761626,43.56298586946419]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89931379724668,43.55945289345295]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.9033403802709,43.55945687476074]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p11","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0011","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1617.0,-0.0 1617.0,1949.0 -0.0,1949.0 -0.0,0.0 1617.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1258.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8585194,43.6095381]}},{"type":"Feature","properties":{"resourceCoords":[1258.0,330.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.856488,43.609537]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0111__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p111 [1]","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":"5821.6"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0111__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0111","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.6,1863.2 -0.0,1861.7 -0.0,1949.0 373.0,1949.0 1100.3,1949.0 1108.7,378.4 1455.3,287.2 1455.4,68.4 63.0,60.0 52.6,1863.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0111__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[505.1,1868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8982493,43.5595733]}},{"type":"Feature","properties":{"resourceCoords":[63.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8993759,43.5628758]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0112/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p112","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0112/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0112","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.8,1949.0 112.9,1674.0 -0.0,1673.0 -0.0,26.6 1602.0,29.1 1602.0,1949.0 114.8,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0112/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[434.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8950485,43.5648545]}},{"type":"Feature","properties":{"resourceCoords":[1346.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8927686,43.5648473]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0113__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p113 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4745.6"},{"label":"split_canvas_w","value":"6484.0"},{"label":"split_canvas_h","value":"3050.4"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0113__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0113","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1621.0,1266.2 89.8,1222.4 158.3,1949.0 1621.0,1949.0 1621.0,1266.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0113__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1186.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86748371014713,43.595443224915314]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1186.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86343598601555,43.59521812139843]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86358240815083,43.59383942228458]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86763013228241,43.594064525801464]}},{"type":"Feature","properties":{"resourceCoords":[90.0,1222.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8672663,43.5953657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p12 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6432.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0012","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1608.0,1949.0 1608.0,583.8 900.4,391.5 900.5,0.0 -0.0,0.0 -0.0,1949.0 1608.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.861884,43.6073351]}},{"type":"Feature","properties":{"resourceCoords":[393.0,573.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8585267,43.608066]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p13","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0013","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1617.0,1949.0 -0.0,1949.0 -0.0,0.0 995.0,-0.0 1171.2,88.5 1375.3,190.8 1468.8,-0.0 1617.0,-0.0 1617.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[938.0,1109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.849798,43.612334]}},{"type":"Feature","properties":{"resourceCoords":[938.0,-28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.847228,43.613212]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0015__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p15 [3]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1968.4"},{"label":"split_canvas_w","value":"6468.0"},{"label":"split_canvas_h","value":"5827.6"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0015__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0015","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1617.0,1949.0 1617.0,633.1 1263.2,492.1 599.3,559.6 0.0,615.4 -0.0,1438.5 41.3,1522.9 37.1,1949.0 1617.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0015__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1160.0,1322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8444337,43.6134316]}},{"type":"Feature","properties":{"resourceCoords":[614.0,1716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.84581,43.612734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p16 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6472.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0016__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0016","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1076.8,216.9 1076.3,0.0 494.7,0.0 494.9,270.0 0.0,267.5 -0.0,494.0 47.5,494.4 33.5,1949.0 1618.0,1949.0 1618.0,1452.7 1504.2,1453.0 1513.9,422.2 1115.5,416.9 1121.3,195.8 1076.8,216.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0016__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1105.0,928.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8406283,43.6141263]}},{"type":"Feature","properties":{"resourceCoords":[51.0,1322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8432648,43.6134229]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0017","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.0,923.0 39.1,706.6 -0.0,725.0 -0.0,383.0 -0.0,383.0 0.0,0.0 1614.0,0.0 1614.0,1949.0 422.6,1949.0 434.9,929.3 38.0,923.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.84068650883229,43.61673702721558]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.83664125768156,43.616730869196545]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8366514567884,43.61316930322492]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.84069670793913,43.613175461243955]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p18 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3558.4"},{"label":"split_canvas_w","value":"2669.6"},{"label":"split_canvas_h","value":"4237.6"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0018","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4.9,1892.0 329.7,1909.0 639.5,893.5 0.0,889.6 4.9,1892.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[449.3,1524.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8750963,43.6038034]}},{"type":"Feature","properties":{"resourceCoords":[329.2,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.876125,43.6038135]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p19","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0019","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"436.2,1949.0 -0.0,1949.0 0.0,0.0 1487.2,0.0 1614.0,187.8 1614.0,1486.3 1299.4,1470.5 1300.0,1896.0 438.6,1896.0 436.2,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[846.0,1896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8883467,43.6021292]}},{"type":"Feature","properties":{"resourceCoords":[1300.0,1896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.887214,43.6020409]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p1 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6468.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0001","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 0.0,1173.5 830.8,1179.5 824.9,1949.0 883.0,1949.0 1087.0,1949.0 1279.5,1949.0 1265.7,1848.0 1617.0,1800.3 1617.0,-0.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87285765644442,43.610925554907716]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87170458672587,43.608116409895985]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87638364991736,43.607110695993526]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87753671963591,43.60991984100526]}},{"type":"Feature","properties":{"resourceCoords":[1381.0,431.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8729076,43.608304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0020__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p20 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6432.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0020__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0020","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1527.8,703.6 391.7,634.7 81.0,170.3 75.0,1480.2 1063.5,1486.5 1061.8,1746.5 1365.7,1747.1 1360.6,1359.2 1522.0,1361.0 1527.8,703.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0020__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[644.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8847223,43.6039522]}},{"type":"Feature","properties":{"resourceCoords":[1522.0,1361.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8827096,43.6026664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0021","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1531.0,1949.0 -0.0,1949.0 -0.0,1183.8 159.1,1187.5 173.4,543.8 944.8,436.6 658.7,0.0 1581.0,5.3 1564.8,1205.4 1614.0,1205.9 1614.0,1750.1 1544.8,1754.9 1531.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88283931054792,43.604868283710324]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87878457305973,43.604600639357656]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8792277656295,43.60103000834068]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88328250311768,43.60129765269335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0022","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1545.5,1744.7 1147.1,1746.8 1145.3,1949.0 752.4,1949.0 752.0,1778.0 715.1,1745.8 56.5,1743.4 49.1,1199.5 -0.0,1199.7 -0.0,-0.0 115.0,0.0 332.0,370.2 688.9,344.7 756.6,305.4 764.4,101.5 1016.4,2.2 1125.3,310.6 1531.3,273.8 1554.0,337.5 1545.5,1744.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8788686603795,43.604596444566255]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87483234362017,43.60428997136722]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87534172376641,43.60072227966372]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87937804052574,43.60102875286275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p23","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0023","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1614.0,1765.4 55.0,1742.6 75.8,324.2 53.7,259.7 724.1,200.4 643.8,0.0 1552.5,0.0 1614.0,722.3 1614.0,1144.7 1573.0,1143.3 1614.0,1765.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[614.0,1750.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.874044,43.6009986]}},{"type":"Feature","properties":{"resourceCoords":[1015.0,175.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8726637,43.6037926]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p24","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0024","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1682.5 -0.0,-0.0 1527.4,0.0 1558.5,164.6 1584.4,1875.8 -0.0,1682.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8712606,43.6049871]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8672224,43.6049595]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8672686,43.6014151]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8713068,43.6014427]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0025","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.7,1940.5 716.2,1923.2 553.6,1949.0 -0.0,1949.0 0.0,0.0 1614.0,-0.0 1611.7,1940.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86253566325495,43.606051221204886]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86245216297554,43.603081878394626]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86736922960442,43.6030083493721]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86745272988382,43.60597769218236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0026","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1608.0,21.1 1375.4,1929.5 -0.0,1914.2 -0.0,0.0 1572.3,3.5 1608.0,21.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86248697807933,43.60307992457096]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86240971997131,43.60010209067051]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86735899909957,43.60003380113169]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86743625720759,43.60301163503214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p27","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0027","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1486.9,1523.5 605.2,1511.6 601.6,1949.0 -0.0,1949.0 -0.0,0.0 180.7,0.0 180.5,478.9 617.6,479.1 620.1,425.9 1483.2,426.3 1486.9,1523.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1030.0,1522.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8886349,43.6001526]}},{"type":"Feature","properties":{"resourceCoords":[1488.0,976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8873487,43.6010487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p28","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0028","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1384.9,1516.8 1608.0,1520.2 1608.0,1949.0 759.5,1949.0 761.5,1524.2 306.2,1522.8 298.4,0.0 1608.0,0.0 1608.0,968.9 1383.5,970.2 1384.9,1516.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8862243,43.6009595]}},{"type":"Feature","properties":{"resourceCoords":[306.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8873487,43.6010487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p29","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0029","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1671.4 512.0,1673.7 534.0,1252.0 292.8,1244.2 293.8,702.3 516.5,702.0 519.7,0.0 821.8,0.0 827.6,391.0 1605.8,380.4 1614.0,1795.8 -0.0,1794.3 -0.0,1671.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.0,702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8840893,43.6007924]}},{"type":"Feature","properties":{"resourceCoords":[974.0,702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8829994,43.6007096]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0003","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1617.0,1813.2 507.0,1251.2 -0.0,785.7 -0.0,-0.0 1617.0,0.0 1617.0,1813.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8862417096191,43.60543547602734]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88268916243918,43.606816837377735]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88040594175254,43.60369433410178]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88395848893246,43.602312972751385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0030","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1555.2,1800.7 -0.0,1785.1 -0.0,357.9 777.1,352.8 779.6,176.3 816.4,148.2 1563.5,162.8 1555.2,1800.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88125823590363,43.60180974502567]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8773143673668,43.60153068113265]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87777817036563,43.59804454682004]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88172203890247,43.59832361071306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p31","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0031","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.2,1800.5 148.4,1797.9 144.6,368.4 542.4,366.1 542.6,160.1 1511.1,154.1 1516.2,1800.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[541.0,1250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.876749,43.5992244]}},{"type":"Feature","properties":{"resourceCoords":[149.0,1250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8777205,43.5993023]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p32","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0032","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"121.5,1780.8 133.4,147.2 1161.1,157.3 1319.2,1791.3 121.5,1780.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,1786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8734881,43.5979608]}},{"type":"Feature","properties":{"resourceCoords":[520.0,695.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8732147,43.5999364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0033","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1781.8 237.2,126.1 1452.9,132.2 1447.3,719.0 1604.0,737.2 1604.0,1799.1 623.4,1788.5 620.8,1809.3 -0.0,1781.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86701868189083,43.6019867203538]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86695647078993,43.59904916288497]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87185089063591,43.5989940354243]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87191310173681,43.60193159289313]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0034","type":"ImageService3","width":1611,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.5,746.5 -0.0,729.6 -0.0,169.3 711.4,147.6 711.7,179.1 1585.5,170.6 1399.9,1818.2 167.6,1812.7 157.5,746.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8669432328484,43.5993236587818]}},{"type":"Feature","properties":{"resourceCoords":[1611.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8669193169269,43.596385162716956]}},{"type":"Feature","properties":{"resourceCoords":[1611.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8717938231089,43.59636406117437]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8718177390304,43.59930255723921]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0035","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"641.1,1924.4 28.4,1908.8 295.4,42.4 257.4,-0.0 1604.0,-0.0 1604.0,1949.0 640.4,1949.0 641.1,1924.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86244441113386,43.60064775799121]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86229522986618,43.597657747347185]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8672769582087,43.597525550244626]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8674261394764,43.60051556088865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0036","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"846.1,1949.0 -0.0,1949.0 -0.0,1913.6 264.9,1913.0 225.3,8.3 1618.0,4.8 1411.3,1926.8 849.4,1921.8 846.1,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86234657230315,43.59808079958579]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86228142395845,43.59503297794573]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86731529853753,43.59497574353882]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86738044688224,43.59802356517888]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p37 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4692.0"},{"label":"split_canvas_w","value":"6416.0"},{"label":"split_canvas_h","value":"3104.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"869.4,1626.7 1054.9,1633.2 1043.5,1586.4 874.4,1348.2 877.4,1180.5 0.0,1173.0 -0.0,1264.2 108.5,1267.9 101.3,1599.0 43.1,1596.3 76.3,1949.0 863.5,1949.0 869.4,1626.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1173.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.85936917510881,43.597344110154246]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1173.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.85135563678419,43.59692773342173]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.85163436827666,43.59411869266474]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.85964790660128,43.59453506939726]}},{"type":"Feature","properties":{"resourceCoords":[101.0,1598.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8593058,43.5958005]}},{"type":"Feature","properties":{"resourceCoords":[101.0,1598.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8590158,43.5957759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p37 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6416.0"},{"label":"split_canvas_h","value":"4747.2"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"225.9,0.0 364.3,1110.6 -0.0,1115.7 0.0,1173.0 1488.2,1185.8 1413.8,607.8 1521.0,608.9 1513.3,0.0 225.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0037__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[297.0,608.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8623322,43.5960314]}},{"type":"Feature","properties":{"resourceCoords":[1521.0,608.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8590158,43.5957759]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p38","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0038","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"371.3,1272.7 346.9,1179.5 -0.0,708.9 -0.0,-0.0 1608.0,0.0 1608.0,1949.0 -0.0,1949.0 -0.0,1266.3 371.3,1272.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8549048,43.5977634]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8508947,43.597502]}},{"type":"Feature","properties":{"resourceCoords":[1608.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.851332,43.5939819]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8553421,43.5942433]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p39","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0039","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1466.0,421.0 1468.6,1546.6 582.1,1544.5 581.3,1150.8 -0.0,1149.9 -0.0,857.8 581.2,853.8 582.0,447.7 581.8,415.1 1466.0,421.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1466.0,969.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8876528,43.5990769]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,421.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8874976,43.6000616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p4","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0004","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1610.0,1921.6 543.2,1763.9 427.0,1949.0 342.5,1949.0 -0.0,1780.9 -0.0,-0.0 1610.0,0.0 1610.0,1921.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[543.0,1764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8769765,43.604265]}},{"type":"Feature","properties":{"resourceCoords":[406.0,1980.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8770616,43.6038302]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p40","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0040","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"341.5,1545.5 344.9,418.2 797.9,420.0 795.6,842.5 1125.9,842.8 1126.4,966.1 1162.0,966.1 1170.0,1542.2 341.5,1545.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[342.0,967.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8876528,43.5990769]}},{"type":"Feature","properties":{"resourceCoords":[1222.0,1542.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8856264,43.5978728]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0041__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p41 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6416.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0041__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0041","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"674.2,391.3 672.9,0.0 574.0,0.0 561.8,884.8 0.0,874.5 -0.0,1674.9 228.2,1657.6 640.5,1526.3 1561.2,1500.4 1555.0,392.0 674.2,391.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0041__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[682.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8901566,43.5971759]}},{"type":"Feature","properties":{"resourceCoords":[1555.0,392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8878099,43.5980385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p42","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0042","type":"ImageService3","width":1608,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"355.1,402.1 1608.0,397.4 1608.0,972.0 1224.0,970.0 1224.6,1504.8 354.2,1502.2 355.1,402.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[351.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8879763,43.5970039]}},{"type":"Feature","properties":{"resourceCoords":[1224.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8857786,43.59683]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0043","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,681.2 -0.0,106.2 1604.0,121.9 1604.0,1825.0 38.5,1803.2 45.8,1261.2 437.6,1268.4 446.2,686.0 -0.0,681.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88559504842864,43.599109742039175]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88163325832244,43.59883454063378]}},{"type":"Feature","properties":{"resourceCoords":[1604.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88209176179818,43.59532367322193]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88605355190438,43.59559887462732]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p44","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0044","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"51.4,1818.0 23.2,110.3 1553.0,105.2 1561.5,1949.0 770.6,1949.0 26.1,1949.0 27.1,1818.3 51.4,1818.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[770.0,1264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8801306,43.5963971]}},{"type":"Feature","properties":{"resourceCoords":[219.0,111.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8811773,43.5985747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p45","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0045","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"150.6,131.1 1522.6,130.4 1530.4,1663.8 160.8,1665.3 150.6,131.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[552.0,1288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8772039,43.5961683]}},{"type":"Feature","properties":{"resourceCoords":[1528.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8746313,43.5970084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p46","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0046","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"858.4,1638.8 70.5,1630.2 65.5,1664.0 63.8,128.5 1276.3,128.5 1475.3,1841.9 858.5,1836.3 858.4,1638.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[858.0,1285.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8728346,43.595821]}},{"type":"Feature","properties":{"resourceCoords":[858.0,130.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8725238,43.5978851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p47","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0047","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,245.1 1559.7,137.9 1558.8,1800.0 1142.0,1796.0 1141.9,1949.0 -0.0,1949.0 -0.0,245.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1142.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8902732,43.5961764]}},{"type":"Feature","properties":{"resourceCoords":[1142.0,1796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8907108,43.5932418]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p48","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0048","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1412.0,151.0 1409.9,1793.2 77.4,1794.9 77.8,149.6 1412.0,151.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[988.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8869786,43.5959376]}},{"type":"Feature","properties":{"resourceCoords":[1412.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8859242,43.5958549]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p49","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0049","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1576.6,1813.0 61.4,1805.8 69.3,161.7 1600.0,170.2 1576.6,1813.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[947.0,714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.883887,43.5946956]}},{"type":"Feature","properties":{"resourceCoords":[66.0,1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8862182,43.593879]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p50","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0050","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1826.4 9.7,319.2 1535.3,317.1 1544.5,1815.6 -0.0,1826.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[208.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8817831,43.5945319]}},{"type":"Feature","properties":{"resourceCoords":[1147.0,1818.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8797482,43.5923813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p51","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0051","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1600.0,1949.0 547.8,1949.0 555.2,1817.2 162.7,1819.5 153.4,0.0 1523.6,0.0 1523.7,1822.0 1600.0,1825.8 1600.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0051/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[960.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8764769,43.5941145]}},{"type":"Feature","properties":{"resourceCoords":[156.0,722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8784694,43.594276]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0052","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"11.7,1832.8 0.0,-0.0 780.0,0.0 781.9,194.2 1392.6,193.2 1585.8,1818.8 11.7,1832.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87487069721841,43.59535744597164]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87087498047624,43.595010325033805]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87145290974127,43.59147137507355]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87544862648343,43.59181849601139]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0053","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"223.3,128.3 1486.5,124.1 1476.9,1826.0 37.5,1822.8 223.3,128.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86694190682334,43.5968282917279]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86693011781942,43.59392936671398]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87177184607178,43.59391889307991]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8717836350757,43.59681781809383]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0054","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1605.0,607.4 1467.8,608.5 1341.8,1833.2 -0.0,1838.9 -0.0,135.7 50.6,134.7 60.5,-0.0 1605.0,-0.0 1605.0,607.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.866899846978,43.59413359266154]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86691066520433,43.5912260968428]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87175136434054,43.591235678501036]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87174054611421,43.594143174319775]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p55","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0055","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1519.7,663.2 1216.3,597.8 1273.2,1949.0 -0.0,1949.0 -0.0,1604.4 312.3,1632.3 413.4,480.1 260.1,466.4 301.0,46.2 1574.6,157.9 1519.7,663.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0055/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88955871890221,43.59368944082517]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8896341783195,43.59083725844733]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89439758294394,43.590904301993625]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89432212352665,43.59375648437147]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0056","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1447.0,-0.0 1420.8,561.9 1605.0,817.9 1605.0,1949.0 -0.0,1949.0 -0.0,483.4 298.4,561.0 382.4,-0.0 1447.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88988771256527,43.59156155942971]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88979779823542,43.58868124568386]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89459304225802,43.588601605619765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89468295658787,43.59148191936561]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0057","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.0,1781.1 313.2,13.7 1563.8,159.4 1472.5,1018.5 1600.0,1032.7 1600.0,1489.6 1413.7,1465.1 1358.5,1922.5 115.0,1781.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8852395871351,43.593385031948124]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88521378532441,43.59047061659114]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89008110049893,43.59044769230214]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89010690230963,43.593362107659125]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0058","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"235.6,1749.1 281.5,1352.2 468.1,1375.8 465.9,918.4 338.2,904.9 425.2,44.6 1052.9,102.3 1458.8,105.3 1438.0,1208.8 1271.7,1206.2 1274.8,1497.5 1469.0,1634.0 1287.3,1646.2 1285.3,1726.8 235.6,1749.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88550276255233,43.591308794000796]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.885496815021,43.588387679779956]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89035995379858,43.588382411822984]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89036590132991,43.59130352604382]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0059","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1600.0,1780.4 49.0,1937.0 55.0,58.4 1600.0,71.7 1600.0,1780.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88539123672655,43.592930897360404]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88139385775888,43.59263852644884]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.881882134185,43.58908689869847]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88587951315267,43.589379269610035]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0006","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1354.3,1010.9 1610.0,1013.4 1610.0,1066.3 792.6,1062.8 792.9,1003.3 237.9,994.2 247.1,559.2 1360.6,575.5 1354.3,1010.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89217366520653,43.57814041743682]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89216820641701,43.581042254572864]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88735302007383,43.58103743367189]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88735847886335,43.578135596535844]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0060","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1486.9,1638.0 78.0,1785.2 70.2,72.1 1526.9,72.2 1486.9,1638.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88156776399147,43.592652110335614]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87757034234848,43.592346345138246]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.878079394901,43.58880572775971]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88207681654399,43.58911149295708]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0061","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"168.3,391.6 1217.5,399.4 1218.5,277.4 1533.5,279.3 1534.2,1678.9 134.8,1829.2 168.3,391.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87815629450945,43.59273711651576]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87417675374333,43.59243637356722]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87467901051785,43.58890058472586]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87865855128398,43.5892013276744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0062","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"85.7,1699.6 68.8,293.0 1262.2,283.2 1370.3,1214.8 1331.4,1551.1 85.7,1699.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87450075995257,43.59248469014323]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87053402819122,43.59215126910602]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87108912197422,43.58863782480348]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87505585373557,43.58897124584069]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0063__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p63 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6400.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0063__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0063","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1600.0,1883.4 1600.0,-0.0 624.6,0.0 620.1,1000.1 159.3,1004.2 76.0,1785.4 1008.0,1784.9 1335.9,1889.5 1336.1,1949.0 1600.0,1949.0 1600.0,1925.5 1406.3,1887.9 1600.0,1883.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0063__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[889.0,1786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8714642,43.5902274]}},{"type":"Feature","properties":{"resourceCoords":[1338.0,33.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8670431,43.5894084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0064__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p64 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6420.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0064__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0064","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1517.3,1274.0 1605.0,1274.3 1605.0,506.9 905.9,506.9 904.5,0.0 70.8,-0.0 16.4,1853.2 1499.6,1850.5 1517.3,1274.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0064__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[568.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8761884,43.5856827]}},{"type":"Feature","properties":{"resourceCoords":[1099.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.876169,43.584719]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0065__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p65 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6400.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0065__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0065","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"945.8,0.0 690.5,203.9 400.1,214.1 400.0,446.9 0.0,445.8 -0.0,1590.1 1600.0,1572.5 1583.1,0.0 945.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0065__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8917154,43.5867992]}},{"type":"Feature","properties":{"resourceCoords":[426.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8925244,43.5877793]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0066","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1738.5 10.3,192.2 148.8,0.0 440.0,0.0 435.6,166.2 1538.5,198.8 1531.5,1781.3 -0.0,1738.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88960606500778,43.58898120529869]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88560007876553,43.58901697530879]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.885540530616,43.585468564849464]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88954651685825,43.58543279483936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p67","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0067","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1466.3,190.0 1482.7,1686.0 182.3,1674.6 171.9,200.2 1466.3,190.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[618.0,1144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.884664,43.5876895]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,190.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8825409,43.5893935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p68","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0068","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1477.7,195.4 1497.4,1710.3 196.8,1697.3 186.3,200.8 1477.7,195.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1046.0,1170.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8804159,43.5876462]}},{"type":"Feature","properties":{"resourceCoords":[1484.0,640.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8793245,43.5885961]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p69","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0069","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.2,1685.9 95.0,168.0 1600.0,175.0 1600.0,1716.7 99.2,1685.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[949.0,1167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8772043,43.5876136]}},{"type":"Feature","properties":{"resourceCoords":[95.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8793363,43.5893953]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p70","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0070","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1605.0,270.2 1605.0,1949.0 853.6,1949.0 855.4,1741.1 11.1,1709.3 36.5,167.6 1544.5,197.3 1538.2,465.9 1605.0,270.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8738132,43.5894146]}},{"type":"Feature","properties":{"resourceCoords":[193.0,1716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8751318,43.586631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p71","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0071","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.5,1727.4 52.0,1722.0 24.8,224.2 1476.9,232.5 1516.5,1727.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[908.0,766.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8835735,43.5857497]}},{"type":"Feature","properties":{"resourceCoords":[52.0,1722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8857251,43.584044]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p72","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0072","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1714.9 -0.0,233.1 1598.0,279.4 1598.0,1761.0 -0.0,1714.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[690.0,782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8803928,43.5857223]}},{"type":"Feature","properties":{"resourceCoords":[690.0,1736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8803536,43.58399]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0073","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.6,170.2 299.5,137.3 1466.2,109.7 1495.3,1949.0 -0.0,1949.0 -0.0,223.2 389.9,220.0 282.6,170.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8935077245018,43.58609275759764]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89359388209388,43.583142109906134]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8984935549865,43.58321823983316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89840739739442,43.586168887524664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0074","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1521.3,1429.8 1598.0,1464.8 1598.0,1949.0 -0.0,1949.0 5.5,98.2 1530.0,119.0 1521.3,1429.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8936160008923,43.58341781818371]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89362600460868,43.58049958303481]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89850500871002,43.58050848366177]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89849500499363,43.58342671881067]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p75","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0075","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,129.9 1559.5,138.4 1560.9,1846.2 381.6,1850.4 326.9,1897.5 435.9,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[706.0,1419.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8927757,43.5848887]}},{"type":"Feature","properties":{"resourceCoords":[172.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8906575,43.5858285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p76","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0076","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1525.6,141.7 1521.3,1852.8 -0.0,1846.9 -0.0,141.9 7.9,141.9 533.5,142.4 533.5,94.1 1269.0,89.3 1269.6,142.0 1525.6,141.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1524.0,574.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8907471,43.5805913]}},{"type":"Feature","properties":{"resourceCoords":[1069.0,143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8896611,43.5814009]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p77","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0077","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1610.0,1722.5 96.9,1733.5 98.5,1949.0 50.7,1949.0 50.3,63.1 1586.4,67.2 1610.0,1722.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88970702764664,43.58593312088828]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88566766938484,43.58589481491454]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88573123797434,43.58232777284595]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88977059623613,43.58236607881969]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0078","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1531.5,0.0 1557.9,1470.9 1305.3,1524.8 1037.5,1676.1 755.2,1757.0 -0.0,1757.2 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88952041623162,43.58275808995711]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88554167243831,43.58274155129838]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88556932290228,43.57920146405681]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8895480666956,43.579218002715535]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p79","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0079","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1568.7,103.3 1605.0,1813.1 89.0,1816.0 129.1,102.8 1568.7,103.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[785.0,1380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8846208,43.5827927]}},{"type":"Feature","properties":{"resourceCoords":[785.0,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8814354,43.5828139]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0080","type":"ImageService3","width":1592,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"680.3,1384.0 675.6,1815.0 -0.0,1808.1 -0.0,106.0 1524.4,132.1 1511.8,1395.8 680.3,1384.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88116882267887,43.581385666242454]}},{"type":"Feature","properties":{"resourceCoords":[1592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88106841324371,43.57848296553832]}},{"type":"Feature","properties":{"resourceCoords":[1592.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88593955084818,43.57839328794685]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88603996028334,43.581295988650986]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p81","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0081","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.5,-0.0 1497.8,-0.0 1491.4,1923.1 71.5,1919.2 118.5,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1507.0,1046.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8792145,43.5814088]}},{"type":"Feature","properties":{"resourceCoords":[92.0,1046.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8792555,43.583981]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p82","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0082","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.0,1492.4 1545.6,1492.5 1546.7,1949.0 -0.0,1941.8 0.0,-0.0 1602.0,-0.0 1602.0,1492.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8765655690937,43.58144753367995]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.87653306470963,43.57852813225689]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88140165448347,43.578499283226016]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88143415886753,43.58141868464907]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p83","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0083","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"420.8,1787.1 376.9,1949.0 -0.0,1949.0 -0.0,-0.0 428.9,0.0 432.2,224.7 918.5,217.4 952.4,139.3 1582.1,130.8 1588.5,1780.7 420.8,1787.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1182.0,699.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8966571,43.5796284]}},{"type":"Feature","properties":{"resourceCoords":[1182.0,138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8966327,43.5806413]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p84","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0084","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.8,1736.0 115.8,1566.7 -0.0,1565.4 0.0,-0.0 111.3,0.0 106.8,278.8 486.3,285.0 533.2,122.7 1402.2,132.8 1390.8,1752.4 66.8,1736.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[459.0,1739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8987896,43.5747902]}},{"type":"Feature","properties":{"resourceCoords":[1288.0,674.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8967365,43.5766979]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p85","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"27"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0085","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1493.6,1811.3 211.1,1815.3 205.5,157.2 1487.3,157.0 1493.6,1811.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[622.0,1276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8946494,43.5786189]}},{"type":"Feature","properties":{"resourceCoords":[622.0,721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.894626,43.579616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p86","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0086","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1495.5,1822.0 3.1,1805.2 17.9,160.5 702.9,164.0 689.8,1274.6 1120.6,1282.5 1128.0,729.0 1508.0,733.5 1495.5,1822.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1128.0,729.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8896922,43.579567]}},{"type":"Feature","properties":{"resourceCoords":[691.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.890794,43.577613]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p87","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0087","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1729.9 -0.0,130.2 1553.8,137.8 1552.4,1731.6 -0.0,1729.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0087/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[708.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8946885,43.5766739]}},{"type":"Feature","properties":{"resourceCoords":[708.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8946994,43.5757083]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p88","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0088","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1503.9,679.3 1377.2,678.5 1402.2,1601.9 698.3,1605.9 698.1,1740.2 -0.0,1731.0 -0.0,137.2 1505.6,146.8 1503.9,679.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1130.0,676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8897397,43.5766345]}},{"type":"Feature","properties":{"resourceCoords":[1130.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8897276,43.5776001]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0089","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1512.0,873.0 1609.0,872.1 1609.0,1803.7 401.2,1772.6 393.4,1243.4 144.6,665.7 127.2,88.6 1507.4,87.1 1512.0,873.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88436883590842,43.58031276999141]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88432831481899,43.57740881449319]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88914998551134,43.57737300607688]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88919050660077,43.5802769615751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p90","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0090","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.0,94.4 1558.6,1949.0 467.8,1949.0 472.4,1820.3 50.6,1807.7 57.8,872.5 -0.0,872.6 -0.0,84.0 1602.0,94.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1554.0,1681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.888412,43.574696]}},{"type":"Feature","properties":{"resourceCoords":[506.0,89.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8845354,43.5766177]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p91","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0091","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"9.8,1895.6 -0.0,170.9 56.9,170.8 56.9,-0.0 1609.0,-0.0 1609.0,1890.5 9.8,1895.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1088.0,613.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8813418,43.5766371]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1894.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8845354,43.5766177]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p92","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0092","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1451.1,1849.9 1451.0,1884.0 -0.0,1879.7 0.0,-0.0 1602.0,-0.0 1602.0,1849.1 1451.1,1849.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[555.0,610.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.881303,43.5746469]}},{"type":"Feature","properties":{"resourceCoords":[1451.0,1884.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8844745,43.5729822]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p93","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0093","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1482.0,167.8 1470.0,1792.8 532.4,1791.6 529.6,1949.0 -0.0,1949.0 -0.0,-0.0 1013.5,0.0 967.0,167.8 1482.0,167.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[658.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.9005661,43.572869]}},{"type":"Feature","properties":{"resourceCoords":[938.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.899882,43.5718479]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p94","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0094","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1813.5 -0.0,180.5 1498.8,168.3 1506.7,1802.6 -0.0,1813.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[686.0,712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8967846,43.5738004]}},{"type":"Feature","properties":{"resourceCoords":[1506.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8947658,43.5728122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p95","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0095","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.5,1760.1 48.6,141.4 1460.5,143.5 1465.4,673.6 1588.0,672.0 1589.1,1207.7 1470.4,1207.8 1454.3,1764.5 45.5,1760.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[476.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8936725,43.5737761]}},{"type":"Feature","properties":{"resourceCoords":[1588.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8908728,43.5737502]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0096","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1524.0,146.5 1564.2,1949.0 -0.0,1949.0 -0.0,1208.0 120.8,1209.0 124.8,667.3 -0.0,667.8 -0.0,131.6 133.9,135.2 134.3,0.0 848.1,0.0 851.3,149.8 858.6,132.2 1524.0,146.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89117585713001,43.57495470383675]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88721484080918,43.57494485490138]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.88723126370667,43.57142888788634]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8911922800275,43.57143873682171]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p97","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0097","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"571.7,1810.6 573.7,1651.4 -0.0,1646.9 -0.0,0.0 61.1,0.0 62.6,297.4 590.9,294.7 592.9,137.7 1503.7,134.6 1521.8,1794.3 571.7,1810.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1000.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8999217,43.5699151]}},{"type":"Feature","properties":{"resourceCoords":[1000.0,666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8998987,43.5708833]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0098","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1801.9 -0.0,128.4 1543.8,137.1 1532.1,1788.5 -0.0,1801.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89860864851353,43.57206639185149]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89464512334226,43.57204819480303]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89467546509599,43.568529832587764]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.89863899026726,43.568548029636226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p99","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0099","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.6,1760.1 94.9,148.4 1485.9,153.1 1546.9,1757.5 93.6,1760.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[958.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.892657,43.570811]}},{"type":"Feature","properties":{"resourceCoords":[96.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.8948054,43.5708305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Michigan | 1912 | sanborn03921_002 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1903.6"},{"label":"split_canvas_w","value":"6468.0"},{"label":"split_canvas_h","value":"5892.4"}],"created":"2026-09-21T07:04:52Z","modified":"2026-09-21T07:04:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0009","type":"ImageService3","width":1617,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"347.0,1949.0 639.0,1949.0 1617.0,1949.0 1617.0,475.9 1069.9,477.0 1068.9,913.6 526.6,1149.8 315.5,1239.5 0.0,1236.0 0.0,1441.1 0.0,1484.8 0.0,1499.5 0.0,1560.7 0.0,1562.3 0.0,1683.8 -0.0,1949.0 347.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114bm:g03921191201:03921_01_1912-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,475.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86741624151999,43.61111269199948]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,475.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86398696863657,43.61103222374099]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.86408756598468,43.608752852614046]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.8675168388681,43.608833320872535]}}]}}]}