{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04023_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Grand Rapids, Michigan | 1912 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"106"},{"label":"placed","value":"88"},{"label":"unplaced","value":"18"},{"label":"fit sources","value":"georef 54, georef-snap 36"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"13 sheet(s) cut into 31 panels"},{"label":"unplaced pages","value":"p0A (tier 1, 42.96260,-85.66491 +/-126m); p0B__1 (tier 1, 42.96286,-85.66592 +/-134m); p0B__2 (tier 3, 42.96169,-85.66313 +/-535m); p13__1 (tier 2, 42.96776,-85.65802 +/-166m); p46 (tier 1, 42.96980,-85.64162 +/-252m); p49__1 (tier 2, 42.98118,-85.66626 +/-179m); p49__2 (tier 1, 42.98140,-85.66808 +/-100m); p49__3 (tier 1, 42.98198,-85.66811 +/-100m); p49__4 (tier 1, 42.98246,-85.66832 +/-100m); p49__5 (tier 1, 42.98204,-85.66765 +/-100m); p78__2 (tier 2, 42.99234,-85.66124 +/-100m); p81__2 (tier 1, 42.99640,-85.66200 +/-100m); p82__2 (tier 1, 42.99755,-85.65817 +/-100m); p82__3 (tier 1, 43.00561,-85.66910 +/-100m); p83__3 (tier 1, 42.99972,-85.66294 +/-100m); p9__2 (tier 2, 42.96650,-85.66389 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0001","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"609.9,1949.0 -0.0,1949.0 0.0,-0.0 1327.4,0.0 1325.7,525.4 1299.8,598.5 914.6,1168.3 606.2,1788.1 609.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67534684047317,42.96581549079108]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67153727250522,42.965862000800485]}},{"type":"Feature","properties":{"resourceCoords":[1584.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6714596177751,42.96240764106552]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67526918574305,42.96236113105611]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0010","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1489.7,145.9 1624.0,148.8 1624.0,1386.5 1414.8,1382.4 1402.1,1790.5 157.8,1791.0 267.6,-0.0 881.0,-0.0 951.7,51.1 1497.3,63.5 1491.4,114.0 1489.7,145.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66360221245019,42.96585965121332]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66346996378904,42.962925314746286]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6682485862594,42.96280835131445]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66838083492054,42.965742687781486]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p11","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0011","type":"ImageService3","width":1572,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1530.5,78.0 1521.5,1949.0 -0.0,1949.0 -0.0,914.7 123.0,914.0 128.5,176.4 502.0,175.8 503.6,122.8 503.9,79.2 1530.5,78.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[123.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.663731,42.967359]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.660282,42.96893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p12","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0012","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,1722.1 82.6,1728.0 83.5,1178.0 133.1,1105.7 120.1,487.5 170.9,489.8 170.8,428.5 1497.0,416.7 1501.5,1904.8 1624.0,1905.0 1624.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[844.0,522.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.661805,42.965329]}},{"type":"Feature","properties":{"resourceCoords":[844.0,1774.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6617684,42.9630842]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p13 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6424.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0013","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1528.8,1531.8 1510.2,0.0 135.7,0.0 156.9,1540.6 1528.8,1531.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.660226,42.967418]}},{"type":"Feature","properties":{"resourceCoords":[1511.0,124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65697,42.968898]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0014","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"116.1,1949.0 106.5,0.0 1457.3,0.0 1471.6,1949.0 116.1,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66048669010505,42.96638326922923]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65650477020584,42.96641337957287]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65645573472811,42.96289170315559]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66043765462732,42.962861592811954]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p15","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0015","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"454.4,44.2 1435.2,48.2 1357.9,1910.7 145.2,1912.8 217.9,-0.0 455.8,-0.0 454.4,44.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1400.0,900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.654418,42.965178]}},{"type":"Feature","properties":{"resourceCoords":[185.0,900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.654466,42.967352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p16","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0016","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1410.6,1949.0 1411.1,1891.3 122.4,1890.2 205.4,52.9 1455.1,59.4 1458.2,-0.0 1624.0,-0.0 1624.0,1949.0 1410.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[676.0,50.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6523045,42.9642885]}},{"type":"Feature","properties":{"resourceCoords":[1409.0,907.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6543914,42.9629281]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0017","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"452.3,1851.5 453.2,1806.8 214.4,1810.0 247.6,173.8 1488.7,154.1 1437.1,1842.2 452.3,1851.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64789032084771,42.967709975434374]}},{"type":"Feature","properties":{"resourceCoords":[1606.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64787962401627,42.96484866470234]}},{"type":"Feature","properties":{"resourceCoords":[1606.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65259169657655,42.96483909847267]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65260239340799,42.96770040920471]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0018","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1459.8,-0.0 1624.0,-0.0 1624.0,1949.0 1571.7,1949.0 1569.7,1779.8 1403.7,1781.8 1401.2,1841.8 149.6,1850.5 205.5,426.0 1448.5,422.7 1459.8,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6477918830667,42.965437230552645]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64776120443962,42.96249742906882]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6525486967789,42.96247029609089]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65257937540598,42.96541009757472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0019","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1454.2,1713.0 224.9,1724.7 233.4,1219.2 161.5,872.4 165.8,213.2 436.5,214.0 434.7,-0.0 884.8,-0.0 882.7,212.0 1471.2,215.2 1454.2,1713.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64410423035156,42.96770075444591]}},{"type":"Feature","properties":{"resourceCoords":[1606.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64406861432913,42.96481205023241]}},{"type":"Feature","properties":{"resourceCoords":[1606.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64882579411685,42.96478019861266]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64886141013928,42.967668902826155]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0002","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"745.9,0.0 955.4,0.0 1505.6,497.7 1624.0,1532.0 1624.0,1949.0 -0.0,1949.0 3.4,864.5 745.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67398944844055,42.965891849846344]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66999687957698,42.96600733949765]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66980880304314,42.96247621929416]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6738013719067,42.96236072964285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0020","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.9,1530.8 1424.5,1949.0 186.1,1949.0 208.1,242.5 1571.3,237.7 1573.8,-0.0 1624.0,-0.0 1600.4,1531.2 1436.9,1530.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[656.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.645436,42.96423]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6454157,42.962782]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p21","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0021","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1606.0,0.0 1606.0,895.4 1465.9,894.6 1477.0,1852.1 1606.0,1854.7 1606.0,1949.0 125.1,1949.0 103.0,0.0 1606.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[113.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644579,42.964167]}},{"type":"Feature","properties":{"resourceCoords":[953.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.642497,42.964166]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p22 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3950.4"},{"label":"split_canvas_w","value":"6496.0"},{"label":"split_canvas_h","value":"3845.6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1624.0,1000.9 0.0,987.6 -0.0,1949.0 283.0,1949.0 471.0,1949.0 1624.0,1949.0 1624.0,1000.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[462.0,1893.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.636594,42.962727]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,1893.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6337713,42.9627137]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p22 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6496.0"},{"label":"split_canvas_h","value":"4003.6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"21.4,963.7 151.2,965.6 151.4,988.9 504.5,991.7 1434.6,967.6 1415.8,0.0 4.9,0.0 21.4,963.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6412375631162,42.964485294623294]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6372389012754,42.96446729106386]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1000.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63725406730612,42.962663869623256]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1000.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64125272914693,42.96268187318269]}},{"type":"Feature","properties":{"resourceCoords":[643.0,966.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639669,42.962736]}},{"type":"Feature","properties":{"resourceCoords":[643.0,966.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639669,42.962736]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p23","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0023","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"614.2,97.0 1342.0,90.0 1365.8,827.4 1341.7,1006.3 1346.5,1949.0 -0.0,1949.0 -0.0,-0.0 479.6,0.0 481.6,83.7 614.2,97.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1342.0,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6721987,42.9672195]}},{"type":"Feature","properties":{"resourceCoords":[1342.0,90.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6721991,42.9703815]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0024","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"327.1,85.5 1190.7,78.5 1164.1,1842.8 286.7,1845.5 334.2,836.7 327.1,85.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67300110130725,42.97052142836267]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66903648823902,42.9705887995]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66892696747213,42.96708913200876]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67289158054037,42.96702176087143]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p25","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"17"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0025","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1546.5,74.0 1554.6,1831.3 93.6,1832.4 117.0,80.8 1546.5,74.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1551.0,999.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6665019,42.968824]}},{"type":"Feature","properties":{"resourceCoords":[540.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6689574,42.9672748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p26","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0026","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.1,1833.5 238.5,78.0 118.6,77.5 118.7,0.0 1213.8,0.0 1213.2,155.4 1361.8,190.7 1336.5,1839.9 238.1,1833.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[238.0,1002.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6665019,42.968824]}},{"type":"Feature","properties":{"resourceCoords":[238.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6665617,42.9704969]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p27","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0027","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1539.2,1125.2 1551.0,1852.0 515.8,1851.5 513.6,1949.0 137.0,1949.0 149.6,1034.0 -0.0,1012.4 -0.0,50.7 1442.1,73.6 1456.6,1119.5 1539.2,1125.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[139.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6637559,42.9688731]}},{"type":"Feature","properties":{"resourceCoords":[1551.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.660282,42.96893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0028","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1100.4 -0.0,72.3 467.1,89.5 470.0,0.0 1463.0,0.0 1417.2,1768.7 83.2,1725.2 81.7,1107.1 -0.0,1100.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66065449446755,42.97225941006797]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65661219570443,42.9723681718074]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65643538413532,42.968800027195094]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66047768289845,42.96869126545566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p29","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0029","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.1,1665.6 76.0,111.3 1606.0,166.9 1606.0,1712.8 78.1,1665.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[645.0,1685.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.655552,42.967368]}},{"type":"Feature","properties":{"resourceCoords":[1082.0,847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6544978,42.9688788]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p3","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0003","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"183.8,1103.7 956.2,174.3 1358.0,521.7 913.0,1035.7 901.1,1949.0 -0.0,1949.0 33.6,1229.8 183.8,1103.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1017.0,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.670036,42.963786]}},{"type":"Feature","properties":{"resourceCoords":[636.0,581.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.670989,42.964353]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p30","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0030","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.9,1728.0 52.4,187.8 1532.7,248.3 1520.7,1790.1 35.9,1728.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[62.0,880.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6531703,42.9688607]}},{"type":"Feature","properties":{"resourceCoords":[522.0,1748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.651996,42.967315]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0031","type":"ImageService3","width":1595,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1513.5,1261.1 1514.8,1693.5 1128.2,1752.7 122.8,1731.1 126.9,193.0 1595.0,229.0 1595.0,1263.9 1513.5,1261.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6498995547819,42.97039509140373]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64599314036232,42.97043629729451]}},{"type":"Feature","properties":{"resourceCoords":[1595.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64592481093126,42.96691881337878]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64983122535084,42.966877607488]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p32","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0032","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"609.4,1680.4 -0.0,1681.5 -0.0,1250.8 80.6,1253.9 83.9,225.2 609.0,239.0 612.8,0.0 1627.0,0.0 1627.0,1949.0 606.4,1949.0 609.4,1680.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[609.0,750.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644662,42.969085]}},{"type":"Feature","properties":{"resourceCoords":[609.0,239.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644684,42.970011]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0033","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1422.7,1847.3 878.3,1852.5 -0.0,1824.8 0.0,-0.0 829.1,0.0 828.0,92.0 1625.0,95.8 1625.0,724.5 1421.5,723.4 1422.7,1847.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67445794470883,42.97368227103427]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67048259379634,42.97375348549175]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67036667674411,42.97024020147452]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6743420276566,42.97016898701704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p34","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0034","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1847.4 -0.0,723.9 202.1,725.2 202.6,223.6 339.9,225.8 334.2,0.0 1539.1,0.0 1536.0,921.5 1627.0,968.6 1627.0,1845.5 -0.0,1847.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[314.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6700952,42.9704297]}},{"type":"Feature","properties":{"resourceCoords":[1538.0,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6671859,42.973629]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0035","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"689.6,1830.7 689.4,1738.9 -0.0,1749.6 -0.0,-0.0 444.0,0.0 445.3,130.6 1576.3,109.2 1597.7,1724.0 1625.0,1723.5 1625.0,1949.0 1486.9,1949.0 1485.0,1822.3 689.6,1830.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67415769221179,42.976849239204036]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6701731560054,42.97687527441182]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67013077587094,42.97335405211771]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67411531207733,42.97332801690993]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p36","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0036","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"154.1,104.5 689.1,101.3 690.0,0.0 762.3,0.0 760.4,157.0 1378.2,164.4 1372.0,1725.8 147.2,1724.7 154.1,104.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1375.0,968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6672307,42.975179]}},{"type":"Feature","properties":{"resourceCoords":[147.0,1822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6701975,42.973585]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p37","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0037","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.8,1833.4 211.4,103.0 1371.8,107.2 1339.7,1831.3 213.8,1833.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[213.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6672307,42.975179]}},{"type":"Feature","properties":{"resourceCoords":[965.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6653428,42.9736588]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0038","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1189.3,967.5 150.8,965.7 81.8,929.8 77.0,101.0 1198.1,101.0 1189.3,967.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[825.0,101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6653428,42.9736588]}},{"type":"Feature","properties":{"resourceCoords":[77.0,101.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6671859,42.973629]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0039","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.9,0.0 1625.0,0.0 1602.8,113.0 1625.0,1900.5 168.9,1904.7 169.8,1949.0 -0.0,1949.0 -0.0,1905.4 86.9,1904.0 78.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66462716842064,42.975546898160204]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66064668500117,42.97555716505731]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66062997288651,42.9720394507114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66461045630598,42.97202918381429]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0004","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"230.9,1949.0 227.4,1660.2 411.9,1655.5 401.1,1233.5 222.3,1228.7 226.6,1049.8 664.3,529.2 1145.3,921.4 1202.8,920.1 1212.0,1251.8 1624.0,1256.5 1624.0,1949.0 230.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67086454799944,42.96543090231472]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66691809717985,42.96547053355535]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66685355761571,42.96198017564316]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67080000843531,42.96194054440254]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p40","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0040","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"485.0,1895.5 -0.0,1893.2 -0.0,0.0 169.8,0.0 169.4,116.8 1584.0,122.0 1584.0,1017.6 1485.7,1013.8 1487.0,1772.1 485.1,1804.4 485.0,1853.7 485.0,1895.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[485.0,1050.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6594953,42.9736501]}},{"type":"Feature","properties":{"resourceCoords":[485.0,1896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6594859,42.9721267]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p41","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0041","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"102.4,1897.6 16.4,0.0 1625.0,0.0 1625.0,1886.3 102.4,1897.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,1887.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6551763,42.9701574]}},{"type":"Feature","properties":{"resourceCoords":[1587.0,1887.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.653201,42.970107]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p42 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4091.6"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"985.1,1924.1 978.5,492.3 1022.9,492.0 1022.9,0.0 112.5,0.0 45.0,1903.5 985.1,1924.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[981.9,1059.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.650822,42.971613]}},{"type":"Feature","properties":{"resourceCoords":[480.9,1912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.652043,42.970092]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p42 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"4090.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2273.2"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042","type":"ImageService3","width":1591,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1591.0,0.0 1022.9,0.0 1022.8,1544.1 1179.2,1545.3 1341.7,1546.6 1544.0,1502.2 1542.0,994.9 1386.8,1015.5 1338.4,645.0 1540.1,645.0 1540.7,584.9 1591.0,578.2 1591.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0042__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1062.7,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6520674,42.9751648]}},{"type":"Feature","properties":{"resourceCoords":[1540.1,645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6508585,42.9751721]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p43 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5135.2"},{"label":"split_canvas_w","value":"1694.0"},{"label":"split_canvas_h","value":"2660.8"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.3,1949.0 343.0,1949.0 423.5,1808.9 368.3,1704.7 311.9,1598.2 251.0,1483.3 0.0,1283.8 0.0,1368.6 -0.0,1730.2 62.0,1739.1 34.3,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1283.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64979198391495,42.975393514057416]}},{"type":"Feature","properties":{"resourceCoords":[423.5,1283.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64965015707165,42.974648316964974]}},{"type":"Feature","properties":{"resourceCoords":[423.5,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65123876653935,42.97448417138713]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65138059338265,42.975229368479575]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p43 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6500.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"969.4,1739.2 1017.2,1695.5 1508.5,1697.0 1503.0,230.0 1271.0,230.4 1274.4,-0.0 -0.0,0.0 0.0,1104.3 0.0,1124.1 0.0,1190.7 0.0,1283.8 22.2,1301.4 376.1,1253.4 443.6,1743.8 969.4,1739.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0043__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.649621,42.973863]}},{"type":"Feature","properties":{"resourceCoords":[792.0,235.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6471614,42.9739122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p44","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0044","type":"ImageService3","width":1584,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1429.2,1749.1 -0.0,1746.1 -0.0,235.6 1460.2,254.3 1429.2,1749.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[565.0,1746.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.650822,42.971613]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.649582,42.97005]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p45 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6500.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"989.5,303.6 985.4,201.0 672.2,204.6 675.0,625.5 15.8,625.5 32.0,1861.0 1023.0,1856.5 1018.6,1619.8 1625.0,1598.8 1625.0,297.1 989.5,303.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1012.0,1125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64468,42.97135]}},{"type":"Feature","properties":{"resourceCoords":[32.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.647163,42.970034]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p45 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2700.0"},{"label":"split_canvas_h","value":"2502.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,573.5 165.9,573.3 167.4,625.5 675.0,625.5 670.8,0.0 -0.0,0.0 -0.0,573.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0045__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64550354852665,42.97511032673377]}},{"type":"Feature","properties":{"resourceCoords":[675.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64217956000252,42.97509291557034]}},{"type":"Feature","properties":{"resourceCoords":[675.0,625.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64220159279472,42.97284090586374]}},{"type":"Feature","properties":{"resourceCoords":[0.0,625.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64552558131885,42.97285831702717]}},{"type":"Feature","properties":{"resourceCoords":[164.0,30.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644697,42.974998]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0047","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.7,22.6 67.9,-0.0 1537.7,-0.0 1539.4,92.7 1625.0,131.2 1625.0,1949.0 -0.0,1949.0 -0.0,1637.5 110.9,1636.7 38.7,22.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66826538671508,42.98232246639361]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66828382595085,42.97929854960941]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6732066198971,42.97931484324665]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67318818066133,42.98233876003085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p48","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0048","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1563.2,1949.0 81.3,1949.0 123.3,133.1 328.9,226.5 1444.8,231.6 1445.3,302.2 1545.6,303.3 1563.2,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[694.0,836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6703371,42.9782383]}},{"type":"Feature","properties":{"resourceCoords":[1545.0,417.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6692565,42.9767052]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p5","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0005","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"275.3,1286.2 340.9,1949.0 -0.0,1949.0 -0.0,0.0 77.5,0.0 126.0,588.0 729.0,538.3 809.9,1233.1 275.3,1286.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1175.0,845.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6732468,42.9664179]}},{"type":"Feature","properties":{"resourceCoords":[1175.0,1405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6733502,42.9654995]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p50","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0050","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"834.8,156.2 1530.0,158.4 1533.0,1326.0 1594.0,1325.5 1594.0,1949.0 290.5,1949.0 -0.0,1812.7 -0.0,0.0 46.3,-0.0 51.0,119.6 123.3,157.9 797.5,156.3 797.8,-0.0 837.0,-0.0 834.8,156.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1533.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6660605,42.976748]}},{"type":"Feature","properties":{"resourceCoords":[1533.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6672775,42.9767355]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0051","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"934.6,1871.6 881.3,1834.9 876.4,1715.6 830.5,1715.7 830.9,1949.0 181.2,1949.0 196.7,1353.9 -0.0,1353.2 30.2,177.8 1568.8,182.2 1578.8,166.0 1621.0,166.5 1621.0,1870.1 934.6,1871.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65992740640483,42.98103753630142]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65987880998759,42.978118396646664]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66464265909812,42.978075348072046]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66469125551536,42.980994487726804]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0052","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1874.7 -0.0,162.8 1379.7,162.1 1374.8,1869.1 -0.0,1874.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65988971426765,42.978011366383164]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65988883166878,42.97515553779664]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66462807714746,42.975154742675414]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66462895974632,42.97801057126194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p53","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0053","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 1621.0,-0.0 1621.0,1949.0 78.2,1949.0 96.4,1629.8 -0.0,1628.7 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1132.0,620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6570733,42.9791088]}},{"type":"Feature","properties":{"resourceCoords":[118.0,620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6570965,42.9809299]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0054","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1594.0,-0.0 1594.0,1949.0 -0.0,1949.0 -0.0,0.0 1594.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65553716055305,42.978193334543555]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65553419404742,42.975331808239176]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66028290612302,42.97532913576126]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66028587262865,42.978190662065636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p55","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0055","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1621.0,1888.8 -0.0,1949.0 -0.0,-0.0 52.6,0.0 54.0,196.7 689.6,192.2 692.9,91.2 1532.2,98.5 1538.4,485.7 1562.8,545.8 1621.0,546.7 1621.0,1888.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[673.0,536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6707426,42.9846993]}},{"type":"Feature","properties":{"resourceCoords":[1204.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6694131,42.9822355]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0056","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.0,1949.0 34.0,1949.0 -0.0,1921.6 -0.0,552.5 1560.2,553.2 1599.0,1238.1 1415.4,1255.1 1200.0,1346.7 1564.0,1831.4 1078.0,1858.1 1079.8,1949.0 34.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66825107968991,42.98566845362421]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66438791680484,42.98557573921147]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66454131341166,42.98210676341655]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66840447629673,42.98219947782929]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0057","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.1,535.4 1525.2,496.8 1551.7,1744.3 1064.6,1750.8 1069.0,1949.0 -0.0,1949.0 -0.0,1042.7 484.8,1025.2 131.1,535.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66575810409884,42.98416149331751]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66182741620565,42.984121774492024]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66189223792055,42.980639988362626]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66582292581374,42.98067970718811]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p58","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0058","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.0,1750.0 128.4,512.7 1075.8,523.9 1073.7,1297.3 1599.0,1305.0 1599.0,1684.8 1140.2,1687.7 1139.7,1783.8 134.0,1750.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66239605637203,42.98415958002729]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6584588923509,42.984167945585384]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65844495681105,42.98065653688439]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66238212083219,42.980648171326294]}},{"type":"Feature","properties":{"resourceCoords":[134.0,1750.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6620536,42.9810074]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0059","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1146.5,1192.5 -0.0,1179.3 269.1,384.4 392.8,144.2 1621.0,163.4 1621.0,1190.0 1583.4,1190.2 1588.4,1933.2 1621.0,1949.0 829.8,1949.0 991.7,1883.3 1173.4,1869.6 1146.5,1192.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6672849480826,42.98677531871896]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66331855833195,42.986729657673365]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66339308084336,42.98321638865636]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66735947059401,42.983262049701956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p6","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0006","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"844.5,1223.5 -0.0,1209.2 -0.0,538.8 852.5,567.4 844.5,1223.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[852.0,918.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67216,42.96638]}},{"type":"Feature","properties":{"resourceCoords":[852.0,429.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6721987,42.9672195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p60","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0060","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,1203.0 37.5,1203.0 44.2,172.4 1558.0,176.2 1569.7,1210.3 1525.4,1210.0 1512.4,1209.9 1519.1,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1061.0,174.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.660829,42.986416]}},{"type":"Feature","properties":{"resourceCoords":[560.0,1205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6620814,42.9845727]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0061","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1330.5,1810.8 180.3,1831.9 199.0,-0.0 361.4,27.5 360.2,147.9 433.0,148.9 483.4,95.7 1325.3,584.1 1330.5,1810.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66423139046822,42.989784555131116]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6642114265491,42.986857862115976]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66898828310256,42.986840179829535]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66900824702168,42.989766872844676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p62","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0062","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.8,1718.0 1516.4,1777.3 1455.8,1802.7 -0.0,1838.0 6.0,601.1 738.9,1005.0 1527.8,1280.7 1517.0,1678.9 1599.0,1681.1 1599.0,1717.3 1516.8,1718.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0062/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66418167410977,42.98739110806759]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66420418448591,42.98452038495895]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66895397289031,42.984540597762035]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66893146251417,42.98741132087068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p63","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0063","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"165.2,1789.5 917.8,432.7 863.1,382.8 862.7,309.2 984.4,308.2 1009.1,142.1 1405.7,142.2 1434.5,1811.4 165.2,1789.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0063/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66667222412862,42.989705911925334]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66274014267351,42.989667427164875]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66280295594115,42.986184715218705]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66673503739625,42.986223199979165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p64","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0064","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1491.8,1817.2 14.7,1807.3 -0.0,153.1 1465.1,156.1 1491.8,1817.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6613865,42.988952]}},{"type":"Feature","properties":{"resourceCoords":[997.0,1813.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.660829,42.986416]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p65","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0065","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.9,1852.1 35.8,72.6 1603.3,89.3 1601.5,1872.6 29.9,1852.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1037.0,1563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6571396,42.98594]}},{"type":"Feature","properties":{"resourceCoords":[1037.0,80.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6571598,42.9886076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0066","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.8,1871.4 72.0,1871.3 32.8,1871.0 24.8,98.8 1273.1,104.2 1278.8,1358.2 1599.0,1368.5 1599.0,1949.0 81.9,1949.0 81.8,1871.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65582778063292,42.988775391409305]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65189866800442,42.988775272438396]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65189886485462,42.98524729198787]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65582797748311,42.98524741095878]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0067","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1621.0,1949.0 -0.0,1930.1 -0.0,476.0 55.4,476.9 52.0,15.7 1621.0,27.7 1621.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6597439372639,42.985439289591056]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65562685932464,42.98543978349576]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65562605325061,42.98179295811697]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65974313118987,42.98179246421227]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p68","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0068","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"388.9,1949.0 389.1,1874.3 68.9,1863.2 66.1,600.1 -0.0,600.0 -0.0,-0.0 1599.0,0.0 1599.0,1949.0 388.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[927.0,1362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6505801,42.987221]}},{"type":"Feature","properties":{"resourceCoords":[927.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6505843,42.9885761]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p69","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0069","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1590.4,1949.0 -0.0,1949.0 -0.0,396.4 1539.1,383.7 1590.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6705616,42.9919055]}},{"type":"Feature","properties":{"resourceCoords":[1532.0,168.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.668783,42.99189]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0007","type":"ImageService3","width":1597,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.4,987.7 195.6,1000.4 199.5,277.6 1092.8,281.4 1030.4,736.6 1014.4,1292.2 1528.4,1314.3 1522.8,1690.3 1391.1,1856.7 398.4,987.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67269615909262,42.967698241296574]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6688752554163,42.96778388687076]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66873341806443,42.96434756175448]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67255432174076,42.96426191618029]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0070","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1479.9,0.0 1494.1,1860.9 646.2,1847.7 642.2,1949.0 -0.0,1949.0 0.0,0.0 1479.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67233143274734,42.98883780855622]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66840416904697,42.98886790186608]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.668354376854,42.98534155103815]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67228164055437,42.98531145772829]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p71","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0071","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1444.1,1766.2 104.4,1746.5 126.5,767.5 -0.0,685.5 136.3,691.5 153.3,131.1 1486.5,143.4 1444.1,1766.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0071/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66030881720503,42.99209285855149]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6602424076108,42.989161110963714]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66502769247548,42.989102293369655]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66509410206972,42.99203404095743]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p72","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0072","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.4,142.3 1435.7,132.4 1436.7,1806.8 81.2,1840.0 93.4,142.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,1825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.668755,42.990657]}},{"type":"Feature","properties":{"resourceCoords":[764.0,134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.664581,42.9906405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p73","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"19"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0073","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.8,1407.8 123.7,66.3 1448.6,89.3 1450.9,0.0 1483.3,0.0 1483.4,90.0 1524.8,157.8 1535.0,1847.2 533.2,1846.2 519.4,1407.3 134.8,1407.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[528.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.659633,42.989967]}},{"type":"Feature","properties":{"resourceCoords":[1528.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6571752,42.9899653]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p74","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0074/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0074","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.5,1847.9 40.8,196.8 -0.0,130.4 -0.0,0.0 1599.0,0.0 1599.0,1858.0 49.5,1847.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0074/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65728246383324,42.99200667846089]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65328967561379,42.992006137908284]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65329057005312,42.98842113008531]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65728335827257,42.98842167063791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p75","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0075","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1460.5,1747.5 1465.5,1949.0 -0.0,1949.0 -0.0,-0.0 768.9,0.0 763.0,247.9 1627.0,250.4 1627.0,746.6 1584.3,745.2 1562.9,1748.4 1460.5,1747.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1460.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.668783,42.99189]}},{"type":"Feature","properties":{"resourceCoords":[747.0,1248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6705378,42.9927947]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p76","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0076","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1551.0,241.8 1596.6,1746.0 -0.0,1766.4 -0.0,763.2 42.7,763.7 32.1,267.9 1551.0,241.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0076/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[906.0,1758.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.666296,42.991861]}},{"type":"Feature","properties":{"resourceCoords":[480.0,1259.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6673156,42.9927802]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p77 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6508.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1627.0,721.1 1317.8,639.5 1406.4,303.8 63.2,292.9 73.6,1800.0 1049.9,1804.2 1230.8,1484.3 1230.9,1446.4 1252.2,1446.4 1627.0,783.6 1627.0,721.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[70.0,798.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6645974,42.9936566]}},{"type":"Feature","properties":{"resourceCoords":[70.0,1300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6645994,42.9927522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p77 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4917.2"},{"label":"split_canvas_y","value":"5784.8"},{"label":"split_canvas_w","value":"1590.8"},{"label":"split_canvas_h","value":"2011.2"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1230.4,1601.7 1229.3,1949.0 1580.8,1949.0 1627.0,1774.2 1627.0,1500.7 1230.4,1601.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0077__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1229.3,1446.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66120527823946,42.994814393176334]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1446.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66025816292094,42.99463023446218]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66057624755445,42.99375439951202]}},{"type":"Feature","properties":{"resourceCoords":[1229.3,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66152336287297,42.993938558226176]}},{"type":"Feature","properties":{"resourceCoords":[1698.0,1504.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6601249,42.9944962]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0078__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p78 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3621.6"},{"label":"split_canvas_w","value":"6456.0"},{"label":"split_canvas_h","value":"4174.4"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0078__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0078","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.7 1614.0,1898.2 1614.0,1020.1 691.5,1020.3 504.4,905.4 431.9,1021.9 407.6,1021.5 -0.0,1784.9 -0.0,1913.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0078__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[453.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6606994,42.991812]}},{"type":"Feature","properties":{"resourceCoords":[-65.0,1908.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6621879,42.9918409]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0079","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"757.4,1932.1 758.2,1686.9 -0.0,1693.8 -0.0,-0.0 1627.0,0.0 1627.0,925.8 1565.3,925.4 1567.2,1927.0 757.4,1932.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67230304236186,42.99813959535043]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66827451752532,42.99810146896103]}},{"type":"Feature","properties":{"resourceCoords":[1627.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66833652485447,42.99454697916577]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67236504969101,42.99458510555517]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0008","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"567.2,1550.8 696.2,1389.5 703.8,1023.3 203.3,999.1 221.9,458.1 285.1,15.3 1106.8,25.8 1090.8,1949.0 1034.1,1949.0 567.2,1550.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67076272081917,42.96726977159828]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66677337327236,42.96737525519654]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66660158779789,42.96384706491935]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.67059093534469,42.96374158132109]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p80","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0080","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1546.5,0.0 1570.6,1926.2 -0.0,1931.3 -0.0,925.3 62.0,925.8 63.8,0.0 1546.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0080/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66843182183591,42.99809534716746]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66445293946008,42.998063261656974]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66450554240163,42.99452429361419]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66848442477746,42.994556379124674]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0081__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p81 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6508.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0081__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0081","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,1551.4 193.7,1671.0 214.7,1740.3 188.8,1765.4 1627.0,1789.0 1627.0,336.5 40.0,311.3 40.0,1551.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0081__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[40.0,231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6646217,42.9972838]}},{"type":"Feature","properties":{"resourceCoords":[40.0,1763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.664612,42.9945665]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0082__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p82 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6456.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0082__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0082","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"110.7,1796.5 302.2,1808.9 265.4,1949.0 710.0,1949.0 949.0,1949.0 1050.5,1949.0 1051.3,1470.7 1051.9,1102.3 1614.0,1102.0 1614.0,0.0 107.1,0.0 110.7,1796.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0082__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[537.0,763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6597325,42.9963401]}},{"type":"Feature","properties":{"resourceCoords":[537.0,1280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6597362,42.9954324]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p83 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6508.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.2,1234.3 137.5,1369.0 521.4,1361.0 556.9,1860.5 480.6,1862.0 521.5,1949.0 534.6,1949.0 551.0,1949.0 651.0,1949.0 694.0,1949.0 798.0,1949.0 920.0,1949.0 1186.0,1949.0 1187.0,1540.1 1627.0,1535.5 1627.0,0.0 -0.0,-0.0 0.0,1063.2 0.0,1096.0 0.0,1129.3 15.7,1156.7 59.3,1153.5 60.2,1234.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[584.0,857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6633113,42.9991028]}},{"type":"Feature","properties":{"resourceCoords":[50.0,857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.664631,42.9991156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p83 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4517.2"},{"label":"split_canvas_w","value":"2086.0"},{"label":"split_canvas_h","value":"3278.8"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.4,1844.6 483.4,1868.0 461.8,1822.1 460.9,1820.9 392.9,1733.5 234.6,1548.5 215.6,1505.3 126.2,1349.4 59.4,1346.0 65.6,1243.7 0.0,1129.3 0.0,1292.3 0.0,1409.7 55.3,1413.5 29.4,1844.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0083__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1129.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66479544738344,42.998571798108905]}},{"type":"Feature","properties":{"resourceCoords":[521.5,1129.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66351667902109,42.99862648632749]}},{"type":"Feature","properties":{"resourceCoords":[521.5,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66340003844773,42.99714695994815]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66467880681009,42.997092271729564]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p84","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0084","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1614.0,1949.0 -0.0,1949.0 -0.0,-0.0 1614.0,-0.0 1614.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0084/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65642306961742,43.01843913269969]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65633620928288,43.01553195789843]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66113404039685,43.01545521038664]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66122090073138,43.0183623851879]}},{"type":"Feature","properties":{"resourceCoords":[970.0,730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6581679,43.0166632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1912 | sanborn04023_007 p9 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6320.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T18:46:43Z","modified":"2026-09-23T18:46:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0009","type":"ImageService3","width":1580,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1308.1,-0.0 1309.3,213.6 264.6,219.6 272.4,1850.3 473.7,1848.4 475.3,1737.6 469.5,1736.3 475.4,1734.2 517.1,1719.1 581.4,1735.4 661.3,1755.7 674.2,1763.1 719.4,1789.2 778.5,1823.3 686.9,1806.8 694.4,1846.3 1289.4,1840.8 1369.5,-0.0 1308.1,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023191201:04023_01_1912-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[269.0,1202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6664492,42.9673186]}},{"type":"Feature","properties":{"resourceCoords":[269.0,597.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.664963,42.967335]}}]}}]}