{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03985_041.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Detroit, Michigan | 1929 | 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":"106"},{"label":"placed","value":"88"},{"label":"unplaced","value":"18"},{"label":"fit sources","value":"georef 51, georef-snap 33, snap:0 3, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 42.36870,-82.95644 +/-2397m); p101__2 (tier 1, 42.35923,-82.93142 +/-175m); p21 (tier 2, 42.36806,-82.95925 +/-2033m); p22 (tier 2, 42.37439,-82.96243 +/-100m); p28 (tier 2, 42.36989,-82.96641 +/-684m); p30 (tier 1, 42.37114,-82.96121 +/-251m); p5 (tier 2, 42.37182,-82.97336 +/-100m); p50 (tier 2, 42.36055,-82.97729 +/-173m); p6 (tier 2, 42.36901,-82.96466 +/-100m); p7 (tier 2, 42.36714,-82.96408 +/-1261m); p73__2 (tier 1, 42.35911,-82.97080 +/-100m); p74 (tier 2, 42.35938,-82.96759 +/-138m); p76__1 (tier 1, 42.35729,-82.96256 +/-248m); p76__2 (tier 1, 42.35895,-82.96381 +/-100m); p78__1 (tier 2, 42.36146,-82.94773 +/-1035m); p78__2 (tier 2, 42.36146,-82.94773 +/-1035m); p8 (tier 1, 42.37681,-82.96339 +/-255m); p93 (tier 2, 42.36029,-82.94728 +/-462m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p1","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0001","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1568.0,0.0 1554.8,1617.2 3.5,1625.2 -0.0,-0.0 1568.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[570.0,1626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.984923,42.367369]}},{"type":"Feature","properties":{"resourceCoords":[1039.0,414.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.985309,42.369703]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0010","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.2,1782.1 49.7,0.0 1496.1,0.0 1495.6,1559.3 538.4,1564.8 539.0,1777.5 46.2,1782.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96118231455982,42.37922131018517]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95766442250095,42.38049987882578]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.955586434977,42.377335727645615]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95910432703586,42.37605715900501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p100","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0100","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1193.0,0.0 1584.0,0.0 1584.0,1949.0 -0.0,1949.0 -0.0,487.2 187.5,487.1 188.2,240.4 260.7,240.2 270.5,173.8 1193.1,171.1 1193.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[270.0,487.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.934067,42.361428]}},{"type":"Feature","properties":{"resourceCoords":[1511.0,1404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.930293,42.360914]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0101__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p101 [1]","metadata":[{"label":"streets","value":"1"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3748.4"},{"label":"split_canvas_w","value":"6356.0"},{"label":"split_canvas_h","value":"4047.6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0101__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0101","type":"ImageService3","width":1589,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 1141.0,1949.0 1589.0,1949.0 1589.0,1642.0 1589.0,1228.0 1532.4,1346.5 976.0,1080.5 0.0,937.1 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0101__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,937.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93264407769561,42.35836532705822]}},{"type":"Feature","properties":{"resourceCoords":[1589.0,937.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93023251610222,42.36061247132985]}},{"type":"Feature","properties":{"resourceCoords":[1589.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.92829708958612,42.35947676549125]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93070865117951,42.35722962121962]}},{"type":"Feature","properties":{"resourceCoords":[1550.0,1109.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.929962,42.360365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0011","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1460.8,1768.0 121.3,1756.8 142.1,195.7 -0.0,193.8 -0.0,-0.0 1482.7,0.0 1460.8,1768.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95843897421743,42.38060759975828]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95494794135251,42.38191833601492]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95281762725432,42.37877841146906]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95630866011923,42.377467675212415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p12","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0012","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"72.6,1755.9 60.4,0.0 1490.4,0.0 1496.5,1725.9 72.6,1755.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[62.0,262.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.954943,42.381379]}},{"type":"Feature","properties":{"resourceCoords":[1486.0,262.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.951794,42.382489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p13","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0013","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.6,1711.7 95.3,1733.2 103.6,0.0 1524.2,0.0 1516.6,1711.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.950617,42.382904]}},{"type":"Feature","properties":{"resourceCoords":[1058.0,1718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.948133,42.38089]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p14","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0014","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1600.7,1689.0 158.3,1689.8 162.3,0.0 1612.0,0.0 1600.7,1689.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[576.0,1690.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.946215,42.381591]}},{"type":"Feature","properties":{"resourceCoords":[996.0,258.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9468188,42.3842515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0015","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.6,1949.0 -0.0,1949.0 -0.0,94.0 1543.2,87.6 1534.8,1797.4 47.1,1809.2 46.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[558.0,1566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.983225,42.3650064]}},{"type":"Feature","properties":{"resourceCoords":[1028.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.983923,42.367779]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0016","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1508.4,0.0 1489.5,1559.1 1595.4,1552.0 1588.4,1949.0 -0.0,1949.0 7.9,0.0 1508.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9840677595589,42.36417084308035]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.98061442869523,42.3655639870635]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97835074291336,42.36245719881366]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.98180407377703,42.36106405483051]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p17","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0017","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.0,241.0 1612.0,257.6 1612.0,1711.5 113.5,1727.5 104.0,241.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[626.0,1723.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9799988,42.3662885]}},{"type":"Feature","properties":{"resourceCoords":[104.0,241.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.982806,42.368223]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p18","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0018","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"269.2,1720.2 247.7,257.4 1438.2,274.5 1416.8,1690.6 269.2,1720.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[948.0,1702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9764248,42.3677084]}},{"type":"Feature","properties":{"resourceCoords":[948.0,269.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9779908,42.370004]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0019","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"33.6,269.1 969.2,275.5 963.4,1648.0 29.9,1680.5 33.6,269.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97728273206138,42.37079951138723]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97377821894916,42.37208190798262]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97169429194916,42.36892936405078]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97519880506138,42.36764696745539]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0002","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1296.2,1634.0 67.3,1632.7 56.0,0.0 1309.0,0.0 1296.2,1634.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[591.0,1626.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.981675,42.368667]}},{"type":"Feature","properties":{"resourceCoords":[1150.0,157.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.982105,42.371489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0020","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1547.9 102.7,1634.0 67.9,0.0 1612.0,0.0 1612.0,1547.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97531981391836,42.37151403770274]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97175067441374,42.37273695129845]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96976336467958,42.36952634288037]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9733325041842,42.36830342928466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0023","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1258.8,1781.6 96.7,1872.0 99.8,78.4 1288.5,74.8 1258.8,1781.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.98140776260804,42.365894009237856]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9779321290751,42.36726090438076]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97571105928589,42.36413410096783]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97918669281883,42.36276720582493]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0024","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1426.9,1626.0 -0.0,1780.3 -0.0,73.2 1451.0,43.0 1426.9,1626.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97862502802461,42.3669850668976]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97511803353046,42.36830672190822]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97297043906424,42.36515175711018]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97647743355839,42.36383010209956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0025","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1551.0,1623.9 39.6,1793.2 42.6,197.2 1556.9,142.8 1551.0,1623.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97572328406332,42.36839010204654]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97222116469872,42.36966641697564]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9701471984588,42.366515908051326]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9736493178234,42.365239593122226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0026","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1456.2,92.9 1458.2,1535.4 770.4,1543.2 84.0,1610.5 82.5,144.2 1456.2,92.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97252384959063,42.36956283560043]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96897733417373,42.370839035563975]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96690351646167,42.36764864682375]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97045003187857,42.36637244686021]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0027","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.2,150.1 -0.0,153.6 -0.0,-0.0 1612.0,0.0 1612.0,1675.7 1335.7,1617.2 125.5,1615.5 143.2,150.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96969120059869,42.370689148933224]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96622330219094,42.37198022872001]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96412526726688,42.36886061847279]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96759316567463,42.367569538686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0029","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1398.4,1949.0 -0.0,1949.0 -0.0,-0.0 1426.4,42.3 1398.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96348619458033,42.375273896735614]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9601366095723,42.37653113106499]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95809344391053,42.37351814406779]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96144302891855,42.37226090973841]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p3","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0003","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1689.1 -0.0,-0.0 1494.3,0.0 1463.0,1711.5 -0.0,1689.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[452.0,1696.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.979141,42.369594]}},{"type":"Feature","properties":{"resourceCoords":[978.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9796142,42.3723885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0031","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1949.0 0.0,0.0 1612.0,0.0 1612.0,1949.0 0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96325149361333,42.37538680339526]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95980456526121,42.376661517788754]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95773296891397,42.37356100438862]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96117989726609,42.372286289995124]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0032","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1247.9,1949.0 1078.7,1949.0 784.2,1867.1 826.9,1866.8 -0.0,1597.9 -0.0,57.1 1258.1,47.9 1247.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.961252106695,42.37244513648695]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95783790433227,42.373703263939724]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95579335326595,42.37063205376113]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95920755562868,42.369373926308356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p33","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0033","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1298.4,0.0 1266.8,1949.0 290.5,1949.0 323.1,0.0 1298.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[308.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.959272,42.374477]}},{"type":"Feature","properties":{"resourceCoords":[1286.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9571296,42.375274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0034","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1277.7,1949.0 119.8,1949.0 113.0,1641.7 122.8,1644.8 301.9,1646.1 275.6,158.3 1249.8,132.6 1277.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95894544412093,42.37283680878655]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95536237398593,42.3740826869366]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95333772486858,42.37085958001155]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95692079500357,42.369613701861496]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p35","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0035","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"329.0,419.0 1287.0,404.8 1288.5,1535.0 334.9,1555.6 329.0,419.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[822.0,1545.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.956074,42.37567]}},{"type":"Feature","properties":{"resourceCoords":[329.0,419.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.958339,42.377108]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0036","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"123.4,412.4 1456.9,433.6 1433.3,1545.0 97.9,1532.7 123.4,412.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95698284519924,42.37843840072349]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95349010312775,42.3797745165204]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95131861496048,42.376632946453505]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95481135703197,42.375296830656595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p37","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0037","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1502.7,1521.7 72.9,1542.7 77.0,424.9 1508.9,408.1 1502.7,1521.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[522.0,1534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.951182,42.377505]}},{"type":"Feature","properties":{"resourceCoords":[522.0,421.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.952373,42.379305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0038","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.1,430.4 1461.0,410.0 1459.3,1520.3 41.2,1538.0 47.1,430.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1006.0,1524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.946939,42.379089]}},{"type":"Feature","properties":{"resourceCoords":[1461.0,410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.947135,42.381262]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0039","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"287.5,1724.3 295.4,85.0 1244.9,74.0 1243.5,1949.0 776.2,1949.0 777.0,1719.8 287.5,1724.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95786711797692,42.37517684697612]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95436067957237,42.376454385557764]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95227154133129,42.373280642857665]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95577797973583,42.37200310427602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p4","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0004","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"944.0,1703.0 16.9,1705.2 18.8,0.0 1612.0,0.0 1612.0,1443.5 944.0,1432.5 944.0,1703.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[944.0,1703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.974881,42.371125]}},{"type":"Feature","properties":{"resourceCoords":[944.0,231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.976451,42.373522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p40","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0040","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"371.5,1530.8 277.0,1498.8 284.6,201.9 774.8,196.8 773.0,427.3 1240.9,426.8 1236.0,1823.3 419.3,1547.0 403.9,1949.0 356.2,1949.0 371.5,1530.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[277.0,1499.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9540111,42.3704972]}},{"type":"Feature","properties":{"resourceCoords":[1236.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.951565,42.3707349]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0041","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"128.2,77.1 1470.5,66.2 1465.3,1813.0 123.0,1824.0 128.2,77.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0041/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95542444261716,42.376071549976274]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9519408204223,42.377347840303486]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94985369179904,42.37419479676794]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9533373139939,42.372918506440726]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0042","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1441.8,0.0 1423.8,1889.5 1010.1,1869.5 80.2,1539.5 94.9,0.0 1441.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0042/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95340830809855,42.373142151422506]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94995095886642,42.37443528259085]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94783639159557,42.371305868894815]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9512937408277,42.37001273772647]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0043","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.7,1949.0 77.1,76.5 1530.4,86.9 1493.3,1949.0 41.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9524038784548,42.37719465442577]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94899029205322,42.37849595243576]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94686222905911,42.37540635539449]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95027581546069,42.3741050573845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0044","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1475.2,1806.7 47.7,1886.6 38.8,116.2 1464.5,84.6 1475.2,1806.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95039542772803,42.37429792461363]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94688228072228,42.37556489287593]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9448104433606,42.372385054450156]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94832359036634,42.371118086187856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0045","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.2,70.8 1496.2,63.4 1491.6,1949.0 48.5,1949.0 58.2,70.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94924961245121,42.378367535291446]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94578390493503,42.37964120699352]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9437009829585,42.37650449199376]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94716669047469,42.375230820291684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0046","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,124.0 1485.6,145.6 1456.4,1758.8 1150.0,1824.6 1149.0,1949.0 -0.0,1949.0 40.0,124.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9472837997102,42.37543448660735]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94385041201811,42.37674400265668]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94170897341556,42.37363639130658]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94514236110766,42.37232687525725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p47","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0047","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.7,1949.0 158.0,85.0 1602.0,81.7 1602.0,1949.0 156.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.945022,42.379788]}},{"type":"Feature","properties":{"resourceCoords":[158.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.945945,42.379455]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0048","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"271.6,1802.2 270.6,1747.8 126.8,1755.1 129.1,144.3 1571.2,152.2 1571.2,0.0 1602.0,0.0 1602.0,1949.0 1422.6,1949.0 1420.6,1716.5 567.9,1729.4 578.2,1787.2 271.6,1802.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94439403890455,42.376573779873205]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9408917044259,42.37785502009032]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93879646828823,42.374685059517006]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94229880276689,42.37340381929989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p49","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0049","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.0,421.3 1602.0,1527.8 155.6,1531.0 157.5,417.7 1602.0,421.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[576.0,1531.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.945022,42.379788]}},{"type":"Feature","properties":{"resourceCoords":[994.0,420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.945296,42.381921]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0051","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.0,373.8 1408.2,280.9 1378.0,1743.8 984.0,1736.7 565.8,1842.0 564.6,1949.0 140.8,1949.0 167.0,373.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97964141921614,42.363534176848916]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97622163064163,42.36491071187499]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97397101865204,42.361814828798515]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.97739080722654,42.36043829377244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p52","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0052","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"955.9,0.0 1344.0,0.0 1333.1,1847.9 1602.0,1854.4 1602.0,1949.0 -0.0,1949.0 0.0,0.0 129.3,0.0 128.3,224.9 955.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[546.0,1828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9743462,42.3583187]}},{"type":"Feature","properties":{"resourceCoords":[129.0,1828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.975259,42.357967]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p53","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0053","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.1,299.4 1380.0,162.6 1376.5,1877.6 1408.5,1877.7 1408.2,1949.0 195.2,1949.0 171.1,299.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.974408,42.363124]}},{"type":"Feature","properties":{"resourceCoords":[1412.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9725798,42.3637904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p54","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0054","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.2,146.4 1372.7,154.1 1373.5,82.0 1375.2,82.0 1357.8,1923.5 437.7,1932.6 436.1,1836.2 162.0,1834.0 145.2,146.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[560.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9717386,42.3592695]}},{"type":"Feature","properties":{"resourceCoords":[162.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9726006,42.3589503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p55","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0055","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"31.9,1949.0 31.9,1949.0 -0.0,1949.0 -0.0,243.7 1520.1,69.9 1512.8,1482.6 1442.1,1849.8 1394.5,1949.0 31.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,1299.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.97086,42.364414]}},{"type":"Feature","properties":{"resourceCoords":[34.0,1299.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9725798,42.3637904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p56","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0056","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1426.0,92.1 1422.2,202.1 1469.2,169.1 1516.1,217.6 1505.0,355.2 1426.4,237.5 1431.3,1870.0 1341.9,1870.0 1341.8,1949.0 -0.0,1949.0 -0.0,119.0 1426.0,92.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[418.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.969083,42.360225]}},{"type":"Feature","properties":{"resourceCoords":[1499.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.966716,42.361081]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p57","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0057","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.5,1833.2 109.4,1511.1 107.5,110.6 783.0,41.8 1602.0,29.8 1602.0,1949.0 8.9,1949.0 49.5,1833.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0057/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[940.0,1312.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.967462,42.3656699]}},{"type":"Feature","properties":{"resourceCoords":[508.0,67.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9697756,42.3673852]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0058","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1415.5,122.8 1400.2,1904.3 -0.0,1889.9 -0.0,249.2 79.0,368.1 90.6,229.8 43.4,180.7 -0.0,209.1 -0.0,103.0 1415.5,122.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96889169270308,42.364065195131865]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96543110853841,42.36534400591063]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96334025992479,42.36221121240452]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96680084408946,42.36093240162575]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0059","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.5,65.7 1330.3,86.5 1587.0,145.7 1587.0,1949.0 253.2,1949.0 311.5,65.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96813426524442,42.36815897498532]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96460736947364,42.36953634645611]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9623339406338,42.36631355526197]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96586083640457,42.36493618379118]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p60","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0060","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"64.7,123.2 1247.2,94.9 1244.9,1949.0 153.4,1949.0 153.9,1892.8 43.0,1892.0 64.7,123.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96597756974222,42.36514482159156]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96250938596019,42.366422287464765]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96038773794753,42.36327274186938]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96385592172956,42.36199527599617]}},{"type":"Feature","properties":{"resourceCoords":[43.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.963824,42.362122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0061","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"995.7,1949.0 1006.5,178.4 1018.5,0.0 1587.0,0.0 1587.0,1949.0 995.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96674696407332,42.36873731197332]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9634195943198,42.37005613024429]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96124278519842,42.36701569683636]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96457015495194,42.36569687856538]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p62","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0062","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1365.4,1949.0 -0.0,1949.0 -0.0,60.9 377.2,51.5 376.2,0.0 1587.0,0.0 1584.5,1878.5 1367.5,1876.9 1365.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96321468360614,42.36609396193324]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95974429704158,42.3673681525812]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95762808860684,42.36421660658317]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9610984751714,42.36294241593521]}},{"type":"Feature","properties":{"resourceCoords":[1513.0,1878.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.957867,42.364272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p63","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0063","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1335.7,1745.2 -0.0,1742.5 -0.0,-0.0 566.8,0.0 567.0,443.3 1368.8,700.2 1327.4,700.8 1335.7,1745.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9612955,42.3701939]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.957818,42.371456]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95572,42.368300700000006]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9591975,42.3670386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p64","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0064","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1831.8 -0.0,-0.0 1587.0,0.0 1587.0,1832.0 -0.0,1831.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[487.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.956646,42.364712]}},{"type":"Feature","properties":{"resourceCoords":[1296.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.954879,42.36535]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0065","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"511.9,440.9 925.5,459.1 926.1,411.7 528.6,393.4 622.1,127.4 1564.7,154.9 1587.0,224.8 1455.7,329.1 1432.7,1820.9 1037.4,1816.9 1035.3,1949.0 -0.0,1949.0 72.2,1691.1 380.2,1693.6 409.3,732.8 511.9,440.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95337120542165,42.37171538482173]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95161982261872,42.369133705651166]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95588119181154,42.367533396035846]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95763257461446,42.37011507520641]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p66","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0066","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1408.0,1813.3 -0.0,1813.0 -0.0,332.9 229.7,139.3 434.6,43.7 1418.4,33.8 1408.0,1813.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1408.0,849.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9521019,42.366353]}},{"type":"Feature","properties":{"resourceCoords":[1408.0,1688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.953965,42.36568]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p67","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0067","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.0,153.2 1081.1,141.8 1118.6,1949.0 163.6,1949.0 628.4,487.4 646.1,106.1 1587.0,108.2 1587.0,153.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[338.0,1396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.951565,42.3707349]}},{"type":"Feature","properties":{"resourceCoords":[628.0,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9492906,42.3709414]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p68","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0068","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"503.6,128.4 482.1,90.6 -0.0,84.7 -0.0,0.0 1330.5,-0.0 1328.0,1790.0 332.6,1799.2 64.9,1949.0 -0.0,1949.0 -0.0,114.5 503.6,128.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0068/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94778412687212,42.37056539177086]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9460781321068,42.3679929418034]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95035052284192,42.366443684717694]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95205651760723,42.369016134685154]}},{"type":"Feature","properties":{"resourceCoords":[1328.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9502804,42.3669899]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0069","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1423.4,93.4 1403.9,1949.0 257.5,1949.0 218.6,1916.0 224.2,584.2 139.1,583.5 155.3,150.9 1423.4,93.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94890373475857,42.371328996310275]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94545658615893,42.372607764328215]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94334580260329,42.36945800120528]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94679295120294,42.36817923318734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0070","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"299.0,59.6 300.7,181.7 1435.8,165.3 1446.5,1847.1 1587.0,1846.2 1587.0,1926.1 77.7,1949.0 91.2,79.2 299.0,59.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94599579934211,42.37238039490747]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94252803372919,42.37365637830855]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94042181071178,42.37048783074547]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94388957632471,42.36921184734439]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0071","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"739.2,64.9 1587.0,59.4 1586.6,1949.0 -0.0,1949.0 -0.0,153.7 443.6,80.6 444.1,134.6 749.0,122.3 739.2,64.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94298340909619,42.3737156979987]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93950830897137,42.3750147808565]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9373639071634,42.37183960463109]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94083900728822,42.370540521773286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p72","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0072","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.0,50.0 1587.0,1949.0 1207.7,1949.0 1209.1,1864.8 -0.0,1872.9 -0.0,151.2 134.8,152.6 134.5,72.5 1587.0,50.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[277.0,154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9401325,42.3706352]}},{"type":"Feature","properties":{"resourceCoords":[277.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.938297,42.367849]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0073__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p73 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3944.8"},{"label":"split_canvas_w","value":"6348.0"},{"label":"split_canvas_h","value":"3851.2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0073__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0073","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.0,1949.0 1587.0,986.5 0.0,986.2 0.0,1949.0 1587.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0073__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,1030.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9717386,42.3592695]}},{"type":"Feature","properties":{"resourceCoords":[235.0,1030.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9726006,42.3589503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p75","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0075","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.0,61.8 1587.0,1949.0 -0.0,1949.0 -0.0,62.3 1587.0,61.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[157.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.966716,42.361081]}},{"type":"Feature","properties":{"resourceCoords":[1476.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.963824,42.362122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p77","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0077","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1949.0 0.0,0.0 1587.0,0.0 1587.0,1949.0 0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96402693590852,42.36219650498111]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96055875212649,42.363473970854315]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95843710411383,42.36032442525893]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96190528789586,42.35904695938572]}},{"type":"Feature","properties":{"resourceCoords":[56.0,74.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.963824,42.362122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0079","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.3,1824.6 157.1,1741.5 34.0,1744.2 39.7,1949.0 -0.0,1949.0 -0.0,126.8 1495.5,100.2 1528.4,1805.3 1131.0,1812.4 1134.2,1949.0 163.3,1949.0 162.7,1885.3 293.2,1881.9 285.8,1820.7 160.3,1824.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.958317275924,42.364367386413434]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95477834699243,42.36558667162791]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95276597231343,42.36235268567421]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.956304901245,42.361133400459735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p80","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0080","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1222.4,1824.0 119.8,1828.6 120.6,111.6 1221.6,107.4 1222.4,1824.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[535.0,1828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.952128,42.362875]}},{"type":"Feature","properties":{"resourceCoords":[535.0,110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.953965,42.36568]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p81","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0081","type":"ImageService3","width":1587,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1385.2,1836.6 -0.0,1838.1 -0.0,112.8 1228.1,118.6 1253.1,1343.3 1361.0,1572.8 1385.2,1836.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0081/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.950266,42.363553]}},{"type":"Feature","properties":{"resourceCoords":[159.0,112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9521019,42.366353]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p82","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0082","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"117.7,1949.0 103.2,1565.8 -0.0,1334.2 -0.0,107.4 1584.0,137.0 1584.0,365.1 1286.4,358.5 1265.2,1855.7 1465.8,1859.6 1584.0,1812.3 1584.0,1949.0 117.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0082/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9498663737043,42.36735939153025]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94642175079187,42.36865937990398]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94425860771666,42.36552530600613]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94770323062909,42.364225317632396]}},{"type":"Feature","properties":{"resourceCoords":[122.0,1830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94757,42.3645168]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p83","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0083","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1426.9,128.1 1418.2,1827.1 983.3,1820.5 956.1,1845.2 955.0,1949.0 181.4,1949.0 181.8,1908.1 318.1,1906.1 316.2,1770.2 248.0,1808.5 -0.0,1818.0 -0.0,329.3 295.8,331.5 293.0,137.1 1426.9,128.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[966.0,1828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.942915,42.366172]}},{"type":"Feature","properties":{"resourceCoords":[1427.0,110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.943763,42.36934]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p84","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0084","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.2,163.3 1462.3,128.8 1463.9,1835.3 98.6,1838.9 98.2,163.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[652.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.940698,42.36698]}},{"type":"Feature","properties":{"resourceCoords":[652.0,124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.942537,42.369778]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p85","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0085","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1104.2,232.6 1104.8,94.0 1506.0,96.0 1501.1,1093.6 1584.0,1097.7 1584.0,1949.0 -0.0,1949.0 -0.0,-0.0 124.2,0.0 125.2,84.3 251.9,83.2 257.7,145.4 125.8,145.9 124.7,210.4 1104.2,232.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[699.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.954809,42.361902]}},{"type":"Feature","properties":{"resourceCoords":[1506.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.953045,42.362546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p86","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0086","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.0,88.0 1220.7,85.1 1224.5,1949.0 206.2,1948.8 200.3,1093.7 117.0,1090.2 115.0,88.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0086/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[535.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.952128,42.362875]}},{"type":"Feature","properties":{"resourceCoords":[115.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.953045,42.362546]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0087","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1402.4,1057.3 1415.5,1949.0 -0.0,1949.0 -0.0,80.3 1392.2,90.5 1419.7,1053.6 1402.4,1057.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95072051968614,42.36354796488694]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94724694293966,42.36481837768856]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9451462387773,42.36163806231993]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94861981552378,42.36036764951832]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0088","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.0,183.2 1584.0,861.4 1386.6,861.3 1399.5,1949.0 299.8,1949.0 263.8,207.7 1584.0,183.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94825222543066,42.364453475402435]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94475287727758,42.36571387614603]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94266869943137,42.362510010083305]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94616804758445,42.36124960933971]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p89","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0089","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"187.8,865.8 188.8,219.1 970.0,212.9 970.3,108.1 997.5,83.0 1451.0,86.0 1440.5,1949.0 -0.0,1949.0 -0.0,866.5 187.8,865.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0089/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[132.0,866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.943954,42.364254]}},{"type":"Feature","properties":{"resourceCoords":[934.0,1458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.94157,42.363921]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0009","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1024.7,1792.8 1025.3,1575.2 79.2,1576.0 79.4,1545.4 -0.0,1546.3 -0.0,-0.0 1522.6,0.0 1516.6,1789.0 1024.7,1792.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96438821506428,42.378056497580175]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.96088176982812,42.37933544131931]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.95880321201955,42.3761815262336]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.9623096572557,42.374902582494464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p90","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0090/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0090","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1324.4,1752.7 -0.0,1759.1 -0.0,101.2 1312.2,97.4 1324.4,1752.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0090/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1083.0,1458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.938051,42.365194]}},{"type":"Feature","properties":{"resourceCoords":[1083.0,98.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.939505,42.367408]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p91","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0091","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1746.1 -0.0,92.4 1250.0,92.0 1248.0,175.9 1584.0,178.0 1584.0,1949.0 1241.9,1949.0 1242.6,1777.1 -0.0,1746.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[312.0,1452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.936838,42.365633]}},{"type":"Feature","properties":{"resourceCoords":[1250.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.936254,42.368594]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p92","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0092/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0092","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.4,172.0 1549.1,0.0 1584.0,0.0 1584.0,1775.8 1249.0,1774.8 1202.3,1949.0 252.8,1949.0 264.6,0.0 1206.3,0.0 1529.4,172.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0092/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[268.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.935707,42.36392]}},{"type":"Feature","properties":{"resourceCoords":[1205.0,732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.933654,42.364666]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p94","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0094/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0094","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1378.7,1949.0 -0.0,1949.0 -0.0,179.6 1377.3,183.4 1378.7,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0094/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.943774,42.361014]}},{"type":"Feature","properties":{"resourceCoords":[1378.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.942508,42.361467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p95","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0095","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1495.8,158.1 1495.7,1949.0 43.5,1949.0 51.6,154.5 1495.8,158.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0095/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[989.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.940444,42.362206]}},{"type":"Feature","properties":{"resourceCoords":[1496.0,728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.939337,42.362603]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0096/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0096","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6.9,1949.0 5.4,0.0 1584.0,0.0 1584.0,1949.0 6.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.94016021294097,42.36383205087982]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93653360030534,42.36514840079092]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93435692842212,42.36182798190672]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.93798354105775,42.36051163199562]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p97","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0097","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,242.2 1584.0,230.8 1584.0,552.5 1323.4,552.4 1320.4,1948.4 -0.0,1949.0 -0.0,242.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0097/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[772.0,552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.942135,42.358519]}},{"type":"Feature","properties":{"resourceCoords":[248.0,552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.943284,42.358105]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p98","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0098","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1478.0,220.3 1478.0,544.0 1584.0,543.5 1584.0,1949.0 -0.0,1949.0 -0.0,544.8 262.1,544.3 261.5,220.7 1478.0,220.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0098/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[24.0,544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.940874,42.358974]}},{"type":"Feature","properties":{"resourceCoords":[1478.0,544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.937701,42.360111]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1929 | sanborn03985_041 p99","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:55:55Z","modified":"2026-09-21T12:55:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0099/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0099","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.3,250.7 1584.0,241.9 1584.0,490.1 1395.4,491.1 1400.0,1949.0 -0.0,1949.0 -0.0,1876.7 134.3,1876.6 133.5,497.5 29.5,498.0 29.3,250.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985192911:03985_11_1929-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[30.0,498.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.937701,42.360111]}},{"type":"Feature","properties":{"resourceCoords":[30.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.937199,42.359345]}}]}}]}