{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04023_011.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Grand Rapids, Michigan | 1930 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"126"},{"label":"placed","value":"81"},{"label":"unplaced","value":"45"},{"label":"fit sources","value":"georef 41, georef-snap 35, snap:0 5"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"28 sheet(s) cut into 76 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 42.93645,-85.63720 +/-2874m); p601__3 (tier 2, 42.94891,-85.63262 +/-100m); p602__3 (tier 1, 42.94842,-85.62962 +/-100m); p605__2 (tier 1, 42.94561,-85.63496 +/-100m); p607__2 (tier 1, 42.94845,-85.62415 +/-100m); p609__2 (tier 2, 42.95545,-85.62660 +/-100m); p610__1 (tier 1, 42.94775,-85.62581 +/-224m); p611__2 (tier 4, 42.93645,-85.63720 +/-2874m); p611__3 (tier 4, 42.93645,-85.63720 +/-2874m); p621__2 (tier 2, 42.95009,-85.61611 +/-105m); p621__3 (tier 1, 42.95209,-85.61216 +/-100m); p621__4 (tier 1, 42.94982,-85.61270 +/-100m); p621__5 (tier 1, 42.95304,-85.61202 +/-100m); p626__2 (tier 2, 42.94474,-85.61046 +/-100m); p626__3 (tier 1, 42.94545,-85.60684 +/-100m); p626__4 (tier 1, 42.94662,-85.60966 +/-102m); p628__2 (tier 1, 42.94123,-85.64279 +/-124m); p629__2 (tier 1, 42.92648,-85.63681 +/-135m); p634__2 (tier 1, 42.94536,-85.63470 +/-100m); p634__3 (tier 1, 42.94007,-85.62712 +/-100m); p639__1 (tier 2, 42.93368,-85.64288 +/-750m); p639__2 (tier 1, 42.93041,-85.65065 +/-100m); p642__2 (tier 2, 42.93414,-85.63539 +/-158m); p642__3 (tier 2, 42.93414,-85.63539 +/-158m); p648__2 (tier 1, 42.92975,-85.63425 +/-127m); p652__2 (tier 1, 42.92994,-85.63704 +/-100m); p702__2 (tier 1, 42.92186,-85.65949 +/-100m); p702__3 (tier 1, 42.91934,-85.66784 +/-100m); p708__2 (tier 1, 42.92137,-85.65592 +/-100m); p708__3 (tier 1, 42.92002,-85.64988 +/-100m); p712__2 (tier 1, 42.92350,-85.66672 +/-100m); p712__3 (tier 1, 42.92519,-85.66653 +/-100m); p715__2 (tier 1, 42.92246,-85.64759 +/-108m); p718__2 (tier 1, 42.91582,-85.65898 +/-100m); p720__2 (tier 1, 42.92329,-85.64678 +/-100m); p720__3 (tier 2, 42.92117,-85.64687 +/-113m); p721__2 (tier 1, 42.90526,-85.65807 +/-100m); p721__3 (tier 1, 42.90601,-85.65632 +/-235m); p721__4 (tier 1, 42.91915,-85.64846 +/-151m); p722__1 (tier 1, 42.91325,-85.65427 +/-255m); p722__2 (tier 1, 42.91211,-85.65433 +/-105m); p723__1 (tier 1, 42.90509,-85.61964 +/-100m); p723__2 (tier 1, 42.90740,-85.62111 +/-167m); p723__3 (tier 1, 42.90492,-85.62134 +/-100m); p723__4 (tier 1, 42.90431,-85.62009 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__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 | 1930 | sanborn04023_011 p601 [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":"6456.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,655.3 546.8,653.0 549.5,1307.3 -0.0,1309.7 -0.0,1544.2 770.5,1576.5 772.7,1949.0 1221.2,1949.0 1202.6,446.7 1155.5,388.4 958.0,295.9 958.0,0.0 897.0,0.0 -0.0,-0.0 -0.0,655.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[770.0,1576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6328555,42.9491634]}},{"type":"Feature","properties":{"resourceCoords":[770.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6328864,42.9518817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__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 | 1930 | sanborn04023_011 p601 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3832.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2624.0"},{"label":"split_canvas_h","value":"2237.2"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1614.0,0.0 958.0,-0.0 958.0,295.9 1155.5,388.4 1293.7,559.3 1307.9,545.1 1366.1,486.9 1614.0,289.0 1614.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0601__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[958.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63479396471662,42.94963890547791]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63481422858854,42.95083387338692]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,559.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63343278125032,42.95084660139016]}},{"type":"Feature","properties":{"resourceCoords":[958.0,559.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6334125173784,42.94965163348115]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__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 | 1930 | sanborn04023_011 p602 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4784.8"},{"label":"split_canvas_h","value":"1200.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.1,34.8 1193.0,80.8 1191.6,0.2 221.1,34.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6309143928278,42.95191143592338]}},{"type":"Feature","properties":{"resourceCoords":[1196.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62795922098599,42.952018745970065]}},{"type":"Feature","properties":{"resourceCoords":[1196.2,300.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62792270353759,42.95147235583481]}},{"type":"Feature","properties":{"resourceCoords":[0.0,300.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63087787537943,42.95136504578812]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__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 | 1930 | sanborn04023_011 p602 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"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":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1377.3,1949.0 1394.7,417.9 1143.0,416.0 1132.8,405.8 1027.0,300.0 714.0,219.9 627.8,197.9 524.4,171.4 528.3,157.5 97.6,29.1 97.5,34.3 -0.0,33.1 -0.0,1949.0 1377.3,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0602__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1009.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.629285,42.950039]}},{"type":"Feature","properties":{"resourceCoords":[1386.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.628358,42.950053]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0603/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 | 1930 | sanborn04023_011 p603","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0603/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0603","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1490.8,1949.0 -0.0,1949.0 0.0,0.0 1614.0,0.0 1614.0,552.1 1489.9,550.2 1490.8,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0603/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63953529297837,42.949236550048454]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63552546217906,42.94927308273786]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63546561582636,42.94570375339973]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63947544662567,42.94566722071032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0604/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 | 1930 | sanborn04023_011 p604","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0604/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0604","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"448.3,519.9 451.8,0.0 1541.3,41.2 1539.5,418.1 1614.0,418.9 1614.0,547.8 1538.5,546.5 1600.6,838.4 1564.0,982.9 1471.8,1123.0 1315.0,988.7 1311.0,1949.0 313.6,1949.0 322.4,517.1 448.3,519.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0604/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63663017161349,42.949184639526514]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63267944285147,42.94924022703905]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63258838160091,42.94572350970747]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63653911036293,42.945667922194936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0605__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 | 1930 | sanborn04023_011 p605 [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":"6456.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0605__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0605","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,189.1 -0.0,1745.7 1520.0,1752.0 1499.7,761.2 1250.6,476.4 1225.9,443.6 1169.2,368.5 1124.1,308.7 1490.4,312.1 1487.3,159.6 -0.0,189.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0605__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[512.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6381899,42.9446616]}},{"type":"Feature","properties":{"resourceCoords":[1520.0,1752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63572,42.942823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0606/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 | 1930 | sanborn04023_011 p606","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0606/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0606","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1489.0,1745.0 515.5,1740.0 510.8,167.2 1495.3,158.2 1489.0,1745.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0606/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[518.0,736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6357392,42.944646]}},{"type":"Feature","properties":{"resourceCoords":[1489.0,1745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633306,42.9428318]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0607__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 | 1930 | sanborn04023_011 p607 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"25"},{"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":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0607__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0607","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.9,888.6 56.5,752.7 50.6,1896.0 114.2,1813.9 284.1,1770.0 658.3,1842.0 596.1,1567.7 1614.0,1572.6 1614.0,989.0 1614.0,939.6 1614.0,349.0 1614.0,330.2 1526.5,328.6 1527.4,214.0 1439.6,211.2 1395.6,216.8 1353.5,223.8 1276.7,236.5 1243.8,271.5 1180.0,339.4 1107.2,301.6 1067.8,281.2 1035.6,264.5 1035.3,264.1 981.6,196.6 960.0,195.9 939.8,214.8 905.8,197.2 908.7,194.3 357.4,176.7 357.2,307.0 281.4,305.6 333.2,551.8 306.6,747.0 213.9,888.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0607__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[56.0,753.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633365,42.947446]}},{"type":"Feature","properties":{"resourceCoords":[1276.0,1428.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.630361,42.946285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0608/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 | 1930 | sanborn04023_011 p608","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0608/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0608","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"950.0,1789.8 56.8,1747.6 71.0,326.1 133.3,244.9 271.4,195.4 669.5,269.9 599.4,0.0 1614.0,0.0 1602.7,1583.7 950.0,1789.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0608/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[649.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6318398,42.9427675]}},{"type":"Feature","properties":{"resourceCoords":[670.0,270.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.631846,42.945524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0609__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 | 1930 | sanborn04023_011 p609 [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":"6456.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0609__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0609","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 1533.8,1949.0 1531.0,540.0 1614.0,537.7 1614.0,501.4 1614.0,404.3 1614.0,360.5 1614.0,-0.0 940.7,0.0 899.5,275.4 714.7,210.4 637.0,183.1 490.3,0.0 258.2,0.0 -0.0,-0.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0609__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1531.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.624898,42.95547]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,1871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6282302,42.9555205]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0610__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 | 1930 | sanborn04023_011 p610 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3502.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2954.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0610__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0610","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1505.0,0.0 1086.5,0.0 1139.3,1298.2 881.2,1308.8 875.5,1949.0 1614.0,1949.0 1614.0,776.0 1614.0,748.5 1614.0,700.3 1614.0,0.0 1505.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0610__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[875.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62633989502743,42.94616616183099]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6245068094769,42.946133025159035]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6246262472758,42.94259562140309]}},{"type":"Feature","properties":{"resourceCoords":[875.5,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62645933282633,42.942628758075045]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,1131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.624782,42.944084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0611__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 | 1930 | sanborn04023_011 p611 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6456.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0611__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0611","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1483.3,477.7 1334.3,379.3 1300.8,348.2 1136.0,195.0 1246.6,50.5 0.0,0.0 -0.0,1949.0 261.0,1949.0 483.0,1949.0 1488.1,1949.0 1483.3,477.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0611__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[563.0,1517.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.627147,42.952836]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,60.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.624898,42.95547]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0612/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 | 1930 | sanborn04023_011 p612","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0612/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0612","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.1,335.7 -0.0,340.9 -0.0,312.3 1317.9,338.7 1317.7,370.9 1453.4,433.4 1444.4,1523.4 1614.0,1524.8 1614.0,1949.0 12.3,1949.0 35.3,410.3 208.2,416.5 206.1,335.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0612/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62848993793752,42.952622819870804]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62449090756749,42.9526936929469]}},{"type":"Feature","properties":{"resourceCoords":[1614.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62437479980348,42.949134173737455]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6283738301735,42.94906330066136]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0613/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 | 1930 | sanborn04023_011 p613","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0613/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0613","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"605.1,680.2 605.8,353.4 1614.0,341.6 1614.0,1338.1 1413.2,1338.8 1448.8,1403.2 845.9,1763.9 298.0,1905.8 301.8,1949.0 96.0,1949.0 87.6,800.9 -0.0,799.9 -0.0,685.1 605.1,680.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0613/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[846.0,1764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.627716,42.946556]}},{"type":"Feature","properties":{"resourceCoords":[298.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.629045,42.946291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0614/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 | 1930 | sanborn04023_011 p614","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0614/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0614","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.8,594.9 308.4,595.6 304.8,553.1 847.3,415.6 1444.9,63.4 1409.9,0.0 1616.0,0.0 1616.0,1949.0 108.2,1949.0 104.8,594.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0614/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62981650294601,42.94728494928384]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62584163483932,42.94733197984042]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.625764689036,42.943798042309076]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6297395571427,42.9437510117525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0615/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 | 1930 | sanborn04023_011 p615","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0615/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0615","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1204.2,1757.7 -0.0,1529.7 -0.0,0.0 1251.8,-0.0 1333.1,72.0 1424.7,9.8 1507.3,75.8 1204.2,1757.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0615/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1544.0,113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6206455,42.9527984]}},{"type":"Feature","properties":{"resourceCoords":[1544.0,1822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.624865,42.9521901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0616/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 | 1930 | sanborn04023_011 p616","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0616/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0616","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 44.9,-0.0 43.5,98.0 1193.1,99.0 1229.5,-0.0 1616.0,-0.0 1616.0,1813.0 515.2,1812.4 453.1,1949.0 420.6,1949.0 422.2,1811.3 -0.0,1807.6 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0616/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[51.0,613.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6219178,42.9527694]}},{"type":"Feature","properties":{"resourceCoords":[1193.0,99.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.620602,42.950719]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0617/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 | 1930 | sanborn04023_011 p617","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0617/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0617","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1527.2,897.6 1508.8,1814.0 477.1,1805.8 -0.0,1705.4 -0.0,-0.0 1616.0,0.0 1616.0,841.9 1527.2,897.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0617/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61873383036583,42.955897877514886]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61524716036877,42.954569767017915]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61742034882491,42.95147028850598]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62090701882197,42.95279839900295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0618/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 | 1930 | sanborn04023_011 p618","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0618/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0618","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,632.2 106.1,827.5 444.1,643.8 428.5,539.3 1422.7,0.0 1594.5,0.0 1528.5,368.9 1509.3,1888.9 0.0,1900.6 0.0,632.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0618/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62226969305901,42.95048276667745]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6204242496663,42.95308546692986]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61616564913119,42.95144488114817]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6180110925239,42.94884218089576]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0619/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 | 1930 | sanborn04023_011 p619","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0619/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0619","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.4,915.7 164.9,859.6 150.9,27.8 -0.0,29.5 -0.0,0.0 1384.5,6.8 1391.5,1835.2 75.7,1821.4 78.4,915.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0619/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6164188,42.9513236]}},{"type":"Feature","properties":{"resourceCoords":[579.0,592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.614972,42.9533041]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0620/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 | 1930 | sanborn04023_011 p620","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0620/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0620","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1378.9,1949.0 1266.8,1774.9 1097.3,1846.6 -0.0,1839.5 -0.0,-0.0 1616.0,0.0 1616.0,1949.0 1378.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0620/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61253430415545,42.95355118010677]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.609051283046,42.952181505390726]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61129239248311,42.94908514540521]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61477541359255,42.95045482012126]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0621__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 | 1930 | sanborn04023_011 p621 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6464.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0621__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0621","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.0,1280.5 1616.0,1291.5 1616.0,989.0 1616.0,938.1 1406.5,705.1 1616.0,551.7 1616.0,521.0 1616.0,436.3 1381.0,387.4 1412.9,247.7 1316.3,246.0 1200.5,243.9 1205.0,292.3 973.0,256.0 924.6,248.4 750.1,180.6 34.2,205.9 84.0,1280.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0621__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[582.0,1280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6165849,42.9491681]}},{"type":"Feature","properties":{"resourceCoords":[84.0,1280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.617637,42.949617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0622/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 | 1930 | sanborn04023_011 p622","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0622/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0622","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"235.2,1292.9 115.6,1284.7 188.7,172.4 517.9,188.1 685.8,122.0 792.5,295.4 1023.8,301.1 1031.3,0.0 1612.0,0.0 1612.0,1030.8 1430.8,678.3 235.2,1292.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0622/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61323550004118,42.95042290636591]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60964601646563,42.94909467459495]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61182459846049,42.94589559144767]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61541408203604,42.94722382321863]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0623/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 | 1930 | sanborn04023_011 p623","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0623/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0623","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,805.8 1612.0,1570.0 1545.0,1617.8 1540.9,1798.0 24.2,1790.2 23.4,1949.0 -0.0,1949.0 -0.0,371.9 31.5,388.5 218.7,0.0 1612.0,805.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0623/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61819693412136,42.949590239734206]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61421473014012,42.94959732652502]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6142031063738,42.946048213352135]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61818531035503,42.94604112656132]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0624/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 | 1930 | sanborn04023_011 p624","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0624/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0624","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1516.0,0.0 1511.9,925.4 1424.0,925.6 1429.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0624/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61812639904376,42.94633039036022]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61414238996494,42.94632240401657]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61415548845936,42.94277148688706]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61813949753818,42.94277947323071]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0625/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 | 1930 | sanborn04023_011 p625","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0625/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0625","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"228.1,0.0 1612.0,0.0 1612.0,825.1 1479.5,745.5 1447.1,1919.0 134.1,1913.6 155.1,802.4 222.7,755.0 228.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0625/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61477058110373,42.948102588132365]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61080765618246,42.948130531390824]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61076182472014,42.94459851442215]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61472474964141,42.94457057116369]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0626__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 | 1930 | sanborn04023_011 p626 [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":"6448.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0626__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0626","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"576.0,1949.0 1612.0,1949.0 1612.0,1002.0 1612.0,947.5 1612.0,924.9 1502.6,866.6 1418.7,752.3 1426.6,756.5 1407.1,736.5 1221.3,483.6 1219.3,480.9 1210.3,475.9 1119.9,413.3 952.6,297.4 814.5,252.8 544.4,112.8 429.2,0.0 238.6,0.0 197.4,0.0 197.6,84.4 66.8,6.0 37.0,1171.5 496.3,1170.1 499.2,1417.2 579.0,1415.9 576.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0626__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[37.0,1172.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.611168,42.94465]}},{"type":"Feature","properties":{"resourceCoords":[1292.0,743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6080465,42.9454491]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0627/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 | 1930 | sanborn04023_011 p627","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0627/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0627","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,-0.0 1612.0,1949.0 80.8,1949.0 72.5,85.0 322.6,80.7 320.9,-0.0 1612.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0627/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[76.0,550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.611168,42.94465]}},{"type":"Feature","properties":{"resourceCoords":[1085.0,1869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.614411,42.942827]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__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 | 1930 | sanborn04023_011 p628 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4089.2"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"25.7,0.0 -0.0,-0.0 -0.0,1874.5 988.3,1892.0 982.6,944.7 10.5,923.5 25.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[39.0,924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639398,42.9428542]}},{"type":"Feature","properties":{"resourceCoords":[988.3,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.636903,42.941024]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__3/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 | 1930 | sanborn04023_011 p628 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4086.4"},{"label":"split_canvas_y","value":"4237.6"},{"label":"split_canvas_w","value":"2361.6"},{"label":"split_canvas_h","value":"3558.4"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1949.0 1612.0,1067.3 1021.6,1059.4 1022.3,1949.0 1612.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0628__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1021.6,1059.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62577276271858,42.934461477651666]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1059.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62430774564776,42.93450839563743]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62421118339545,42.932894112505096]}},{"type":"Feature","properties":{"resourceCoords":[1021.6,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62567620046627,42.93284719451933]}},{"type":"Feature","properties":{"resourceCoords":[1543.1,1140.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.62447,42.934356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0629__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 | 1930 | sanborn04023_011 p629 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6448.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0629__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0629","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1601.2,823.1 1597.4,821.4 122.8,829.3 143.0,1833.2 1612.0,1831.6 1601.2,823.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0629__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[632.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635701,42.941018]}},{"type":"Feature","properties":{"resourceCoords":[1103.0,828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6345306,42.9428244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0630/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 | 1930 | sanborn04023_011 p630","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0630/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0630","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.7,815.9 960.1,840.8 1612.0,622.5 1612.0,1949.0 1558.0,1949.0 1559.0,1825.0 71.6,1818.3 61.7,815.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0630/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63344952329183,42.944312166584446]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62948307629645,42.94429997136097]}},{"type":"Feature","properties":{"resourceCoords":[1612.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6295030772071,42.940764598271834]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63346952420248,42.94077679349531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0631/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 | 1930 | sanborn04023_011 p631","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0631/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0631","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1626.2 -0.0,-0.0 548.4,0.0 541.2,178.3 1470.7,232.8 1470.8,1865.8 570.5,1807.5 569.7,1614.9 -0.0,1626.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0631/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[570.0,933.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639311,42.939665]}},{"type":"Feature","properties":{"resourceCoords":[570.0,1808.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639203,42.938068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0632/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 | 1930 | sanborn04023_011 p632","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0632/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0632","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1577.8,1829.8 1580.6,1475.4 641.2,1745.5 505.6,1439.0 -0.0,1577.3 0.0,-0.0 912.8,0.0 910.0,192.4 1607.0,250.9 1607.0,1829.9 1577.8,1829.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0632/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64148901068441,42.93830496107578]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63750987232993,42.938506756519345]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6371779176989,42.934948693887286]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64115705605339,42.93474689844372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0633/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 | 1930 | sanborn04023_011 p633","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0633/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0633","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1573.0,1854.3 110.1,1849.8 12.4,196.5 1483.7,188.7 1573.0,1854.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0633/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[537.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635878,42.939647]}},{"type":"Feature","properties":{"resourceCoords":[1534.0,956.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633423,42.93963]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0634__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 | 1930 | sanborn04023_011 p634 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6428.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0634__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0634","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"122.3,1667.7 1607.0,1499.4 1607.0,1028.0 1607.0,536.4 1607.0,489.0 1607.0,336.5 1607.0,328.5 1241.9,328.5 1241.1,290.1 1239.2,185.4 39.0,190.1 122.3,1667.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0634__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[996.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.631152,42.940991]}},{"type":"Feature","properties":{"resourceCoords":[91.0,950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633423,42.93963]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0635/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 | 1930 | sanborn04023_011 p635","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0635/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0635","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,77.4 1604.5,197.1 1607.0,1683.2 1584.0,1683.0 1582.9,1949.0 -0.0,1949.0 -0.0,77.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0635/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63742837709442,42.93818896159791]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63346199547959,42.93836966178903]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63316474350559,42.93482299583809]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63713112512042,42.93464229564697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__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 | 1930 | sanborn04023_011 p636 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6428.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1607.0,1267.2 1492.0,1257.1 1489.2,1305.2 1157.3,1262.3 1222.4,756.9 1607.0,806.5 1607.0,222.0 1269.4,506.4 1193.0,430.0 1108.1,345.1 1201.7,252.7 1300.8,154.7 1338.4,58.9 1347.1,0.0 1341.8,0.0 1293.2,0.0 1226.8,0.0 1144.0,0.0 813.0,0.0 635.2,0.0 559.9,0.0 520.0,0.0 47.1,0.0 37.1,177.1 -0.0,173.0 -0.0,1949.0 270.0,1949.0 279.3,1949.0 290.1,1719.7 1047.0,1754.2 1036.2,1949.0 1607.0,1949.0 1607.0,1267.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[748.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63162,42.937997]}},{"type":"Feature","properties":{"resourceCoords":[1127.0,306.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.630697,42.937977]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__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 | 1930 | sanborn04023_011 p636 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4432.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1995.6"},{"label":"split_canvas_h","value":"2025.6"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1607.0,-0.0 1406.8,0.0 1347.1,0.0 1338.4,58.9 1300.8,154.7 1201.7,252.7 1124.3,329.1 1155.1,326.9 1157.9,394.9 1193.0,430.0 1269.4,506.4 1607.0,222.0 1607.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0636__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1108.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6303920483048,42.936299419975946]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63035821403894,42.93720041891194]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,506.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62911900363183,42.93717512383958]}},{"type":"Feature","properties":{"resourceCoords":[1108.1,506.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62915283789769,42.93627412490358]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0637/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 | 1930 | sanborn04023_011 p637","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0637/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0637","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1607.0,0.0 1607.0,298.3 1468.6,287.7 1481.7,1949.0 1059.6,1949.0 1059.6,1760.3 -0.0,1764.3 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0637/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65148161635709,42.936699461214424]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64755779081267,42.93689430851699]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64723727444134,42.933385612083484]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65116109998576,42.93319076478092]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0638/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 | 1930 | sanborn04023_011 p638","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0638/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0638","type":"ImageService3","width":1607,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1607.0,0.0 1607.0,1949.0 -0.0,1949.0 -0.0,274.1 136.6,285.7 138.9,0.0 1607.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0638/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64789946459018,42.93685897130991]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64392863270854,42.93707934053638]}},{"type":"Feature","properties":{"resourceCoords":[1607.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64356613262967,42.933528621841965]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64753696451132,42.9333082526155]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0640/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 | 1930 | sanborn04023_011 p640","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"25"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0640/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0640","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.0,1432.5 -0.0,1135.2 -0.0,-0.0 27.8,0.0 26.2,231.8 525.4,97.3 654.0,401.4 1577.0,139.9 1565.2,879.3 1278.2,860.7 1273.0,1365.4 1273.0,1365.4 1268.5,1804.9 1258.6,1783.3 342.6,1698.1 337.0,1374.4 87.0,1432.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0640/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[654.0,401.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639604,42.935199]}},{"type":"Feature","properties":{"resourceCoords":[1304.0,1882.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.637683,42.932553]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0641/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 | 1930 | sanborn04023_011 p641","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0641/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0641","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1644.5 -0.0,1595.9 233.2,1585.2 220.9,1316.8 -0.0,1316.5 -0.0,587.5 187.7,589.2 162.6,40.6 -0.0,48.0 -0.0,0.0 1599.0,-0.0 1519.6,1630.0 -0.0,1644.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0641/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1540.0,1372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6322923,42.9325083]}},{"type":"Feature","properties":{"resourceCoords":[495.0,1673.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633191,42.934396]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0642__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 | 1930 | sanborn04023_011 p642 [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":"6396.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0642__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0642","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"290.4,1614.5 -0.0,1613.6 -0.0,1652.2 398.6,1655.1 382.6,1949.0 1091.0,1949.0 1281.0,1949.0 1348.7,1949.0 1427.2,1911.7 1552.5,226.4 1599.0,228.1 1556.7,214.8 1562.7,142.6 1331.8,312.0 1305.3,0.0 1242.1,337.9 1068.9,261.8 926.7,199.3 1076.0,0.0 702.0,0.0 663.9,0.0 587.3,0.0 355.8,0.0 342.9,0.0 26.8,-0.0 26.5,30.0 294.2,32.0 290.4,1614.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0642__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[472.0,756.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.634983,42.934415]}},{"type":"Feature","properties":{"resourceCoords":[956.0,1173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635935,42.933491]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0643/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 | 1930 | sanborn04023_011 p643","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0643/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0643","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1476.4,225.6 1516.5,225.4 1528.6,1834.7 1435.4,1827.0 1434.7,1949.0 0.6,1949.0 -0.0,-0.0 1056.7,0.0 1055.8,189.3 1476.3,190.9 1476.4,225.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0643/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[548.0,1465.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.649594,42.930965]}},{"type":"Feature","properties":{"resourceCoords":[1057.0,18.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.648601,42.933627]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0644/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 | 1930 | sanborn04023_011 p644","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0644/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0644","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1853.2 -0.0,199.9 1623.0,205.4 1623.0,400.5 1570.1,394.4 1535.8,686.6 1623.0,724.8 1623.0,1949.0 990.8,1949.0 -0.0,1853.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0644/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1540.0,206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6437666,42.9335164]}},{"type":"Feature","properties":{"resourceCoords":[1520.0,1448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.643581,42.931345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__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 | 1930 | sanborn04023_011 p645 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6492.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1447.2,1949.0 1316.0,531.5 956.1,267.6 981.2,85.0 1011.5,54.5 1016.0,0.0 986.0,0.0 729.8,0.0 598.2,0.0 507.2,0.0 427.0,0.0 374.1,0.0 0.0,-0.0 164.4,1949.0 1447.2,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[157.0,1865.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.643451,42.929984]}},{"type":"Feature","properties":{"resourceCoords":[924.0,1865.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.641655,42.929936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__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 | 1930 | sanborn04023_011 p645 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3824.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2667.6"},{"label":"split_canvas_h","value":"2526.4"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1623.0,402.9 1623.0,76.0 1433.4,26.5 1231.6,274.6 1011.5,54.5 981.2,85.0 956.1,267.6 1424.3,611.0 1623.0,402.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[956.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64189014632781,42.933382553735946]}},{"type":"Feature","properties":{"resourceCoords":[1623.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64023768406338,42.933496097118606]}},{"type":"Feature","properties":{"resourceCoords":[1623.0,631.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6400917732302,42.932341612022945]}},{"type":"Feature","properties":{"resourceCoords":[956.1,631.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64174423549463,42.932228068640285]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__3/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 | 1930 | sanborn04023_011 p645 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4046.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1774.0"},{"label":"split_canvas_h","value":"1098.4"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645","type":"ImageService3","width":1623,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1386.4,84.3 1455.0,0.0 1058.8,0.0 1076.8,119.8 1127.0,170.1 1139.2,174.1 1386.4,84.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0645__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1011.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64382850728963,42.93294111458803]}},{"type":"Feature","properties":{"resourceCoords":[1455.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64272810936617,42.932889535668245]}},{"type":"Feature","properties":{"resourceCoords":[1455.0,274.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64277143614785,42.932387002164475]}},{"type":"Feature","properties":{"resourceCoords":[1011.5,274.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6438718340713,42.93243858108427]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0646/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 | 1930 | sanborn04023_011 p646","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0646/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0646","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"981.4,1594.5 26.9,1561.4 48.5,312.0 1171.1,415.0 1603.0,1398.2 1603.0,1493.5 984.7,1427.7 981.4,1594.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0646/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1449.0,1053.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.636993,42.93159]}},{"type":"Feature","properties":{"resourceCoords":[1008.0,402.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.638231,42.932731]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0647/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 | 1930 | sanborn04023_011 p647","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0647/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0647","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1276.8,269.4 1273.7,951.9 1578.2,952.4 1501.2,1909.1 74.2,1850.8 174.8,-0.0 1603.0,-0.0 1603.0,270.6 1276.8,269.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0647/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62894222544358,42.932854604948524]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62870381431186,42.92995353891079]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63348757616144,42.92973980608547]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63372598729316,42.93264087212321]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0648__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 | 1930 | sanborn04023_011 p648 [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":"6412.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0648__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0648","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1720.2 912.0,1266.9 1010.6,1262.3 972.9,1904.8 1478.0,1891.0 1511.1,764.6 1197.4,377.1 1126.7,277.7 1041.6,236.1 944.9,208.2 795.3,108.2 708.3,0.0 567.7,0.0 342.0,0.0 82.0,-0.0 -0.0,1720.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0648__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[47.0,976.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635889,42.932536]}},{"type":"Feature","properties":{"resourceCoords":[1478.0,1891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6380228,42.9299304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0649/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 | 1930 | sanborn04023_011 p649","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0649/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0649","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,236.6 1437.4,235.0 1430.8,1836.2 311.8,1776.9 312.5,1748.2 -0.0,1721.7 -0.0,236.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0649/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6508907985974,42.930452930390615]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64697207621035,42.93065531384631]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64663836610238,42.92714208227199]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65055708848944,42.9269396988163]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0650/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 | 1930 | sanborn04023_011 p650","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0650/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0650","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1554.4,1949.0 -0.0,1832.3 -0.0,101.9 1056.9,189.7 1558.9,183.3 1554.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0650/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64737270785159,42.930615099425324]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64343646672309,42.93080626510395]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6431212527538,42.92727733712184]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6470574938823,42.927086171443214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0651/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 | 1930 | sanborn04023_011 p651","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0651/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0651","type":"ImageService3","width":1589,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1311.0,294.4 1419.7,1705.4 188.0,1704.6 83.5,268.8 1311.0,294.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0651/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[902.0,1202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.641473,42.928143]}},{"type":"Feature","properties":{"resourceCoords":[152.0,1202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.643309,42.928164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0652__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 | 1930 | sanborn04023_011 p652 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6412.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0652__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0652","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 29.4,1758.1 1471.8,1844.0 1436.8,602.1 1190.7,402.8 1318.8,411.7 1419.9,418.8 1422.4,347.7 967.7,323.9 963.0,0.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0652__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[480.0,823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639193,42.928977]}},{"type":"Feature","properties":{"resourceCoords":[994.0,1820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.637801,42.927187]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0653/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 | 1930 | sanborn04023_011 p653","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0653/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0653","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1652.2 -0.0,139.8 1424.2,235.8 1401.4,1947.4 40.2,1949.0 48.0,1656.6 -0.0,1652.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0653/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63688646796336,42.93017470832751]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63294521524672,42.93037878686585]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63260871165978,42.92684534009109]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63654996437643,42.92664126155275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0654/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 | 1930 | sanborn04023_011 p654","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0654/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0654","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"925.9,304.5 925.2,0.0 1603.0,0.0 1603.0,1949.0 -0.0,1949.0 -0.0,233.2 925.9,304.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_06_1930-0654/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[795.0,1830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.631156,42.92712]}},{"type":"Feature","properties":{"resourceCoords":[795.0,1262.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6312352,42.9281482]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0701/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 | 1930 | sanborn04023_011 p701","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0701/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0701","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1249.8,1949.0 -0.0,1949.0 0.0,-0.0 1002.1,0.0 1006.0,101.0 1253.4,114.2 1249.8,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0701/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66721051721765,42.92759621169009]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6632848173073,42.927699715008885]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66311415874864,42.92418006132089]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.667039858659,42.92407655800209]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0702__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 | 1930 | sanborn04023_011 p702 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6412.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0702__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0702","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3.8,198.3 -0.0,1949.0 186.5,1949.0 183.3,1548.7 1246.1,1580.7 1240.1,320.8 1194.6,275.6 1240.0,294.0 1239.5,194.4 3.8,198.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0702__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[737.0,538.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.665196,42.923505]}},{"type":"Feature","properties":{"resourceCoords":[737.0,1558.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.665113,42.921653]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0703/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 | 1930 | sanborn04023_011 p703","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0703/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0703","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"161.6,93.5 163.3,0.0 1603.0,0.0 1603.0,1937.6 107.7,1949.0 120.6,90.8 161.6,93.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0703/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6644382538643,42.927627634088836]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66047491645723,42.927746878822916]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66027830310028,42.9241934806811]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66424164050736,42.92407423594702]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0704/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 | 1930 | sanborn04023_011 p704","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0704/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0704","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"96.7,254.7 1201.0,234.0 1165.8,1094.5 1188.2,1223.0 1204.7,1949.0 632.5,1949.0 628.9,1623.5 107.7,1595.3 96.7,254.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0704/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66423271971816,42.924540446972735]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66027689297985,42.924627049655854]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66013410760931,42.92108021021025]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66408993434761,42.92099360752713]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0705/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 | 1930 | sanborn04023_011 p705","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0705/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0705","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,56.0 1603.0,135.1 1603.0,1949.0 -0.0,1949.0 -0.0,56.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0705/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66649123646836,42.92174503901255]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66257531804249,42.92186324277918]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66238043944361,42.918352027666444]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66629635786948,42.91823382389981]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__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 | 1930 | sanborn04023_011 p706 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6376.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 1589.3,1949.0 1495.2,593.9 1429.8,601.8 1327.7,392.8 1303.7,343.6 1336.3,311.4 1300.7,299.2 1436.0,160.6 1453.8,142.4 1463.2,132.9 1454.0,0.0 1157.0,0.0 858.0,0.0 490.4,0.0 -0.0,-0.0 -0.0,872.3 81.9,1789.0 -0.0,1781.7 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1522.0,975.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.657587,42.92245]}},{"type":"Feature","properties":{"resourceCoords":[79.0,1742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.661121,42.9211238]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__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 | 1930 | sanborn04023_011 p706 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"5202.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1173.2"},{"label":"split_canvas_h","value":"2407.2"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1594.0,106.0 1594.0,0.0 1453.8,142.4 1436.0,160.6 1300.7,299.2 1336.3,311.4 1303.7,343.6 1327.7,392.8 1355.0,448.7 1594.0,470.9 1594.0,106.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0706__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1300.7,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66481788965186,42.92827558106108]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6641021724348,42.92831458075865]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,601.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66399387757114,42.927233910581094]}},{"type":"Feature","properties":{"resourceCoords":[1300.7,601.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6647095947882,42.927194910883514]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0707/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 | 1930 | sanborn04023_011 p707","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0707/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0707","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1538.5,121.6 1524.3,1949.0 25.0,1949.0 26.1,1786.6 -0.0,1784.7 -0.0,-0.0 1594.0,0.0 1594.0,125.7 1538.5,121.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0707/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.658043352082,42.92742214351072]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65412527991033,42.9275943557885]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65383973000536,42.92406169801891]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65775780217703,42.92388948574113]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0708__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 | 1930 | sanborn04023_011 p708 [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":"6376.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0708__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0708","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"203.0,1949.0 425.0,1949.0 1593.7,1949.0 1505.5,652.9 1404.7,490.0 1392.0,431.1 1392.5,431.0 1417.0,424.0 1383.0,389.6 1353.2,359.4 1338.5,344.5 1252.9,257.8 1067.0,162.8 32.3,237.6 147.0,1949.0 203.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0708__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[518.0,300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.656454,42.923765]}},{"type":"Feature","properties":{"resourceCoords":[36.0,300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.657688,42.923776]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0709/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 | 1930 | sanborn04023_011 p709","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0709/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0709","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"708.1,1841.3 -0.0,1841.7 69.3,178.6 1437.4,270.0 1383.3,1111.7 1594.0,1109.6 1594.0,1949.0 709.6,1949.0 708.1,1841.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0709/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64528190941661,42.92744239114541]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6451021806125,42.924543204507074]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64990941912406,42.92438115592589]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65008914792817,42.92728034256423]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0710/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 | 1930 | sanborn04023_011 p710","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0710/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0710","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1594.0,1396.2 1406.0,1393.0 1409.1,1858.4 -0.0,1856.4 -0.0,385.2 42.8,384.5 64.0,74.6 799.0,79.8 799.7,187.2 1594.0,193.2 1594.0,1396.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0710/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64965176500294,42.92746482557507]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64944198891695,42.92456085340572]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65425716020306,42.92437171325465]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65446693628905,42.927275685424]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0711/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 | 1930 | sanborn04023_011 p711","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0711/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0711","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1886.8 96.2,-0.0 1594.0,-0.0 1594.0,1876.0 -0.0,1886.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0711/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63649272486178,42.92735244254246]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63632143784596,42.92445500501941]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64112576426899,42.92430056741367]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64129705128481,42.92719800493671]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0712__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 | 1930 | sanborn04023_011 p712 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6376.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0712__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0712","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1491.2,802.2 1490.0,656.5 1194.9,348.2 1072.9,173.3 1059.9,172.3 1163.0,21.9 41.0,98.5 25.0,1949.0 274.0,1949.0 1404.7,1949.0 1402.3,805.7 1491.2,802.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0712__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[512.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.643079,42.92638]}},{"type":"Feature","properties":{"resourceCoords":[512.0,1856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64551,42.9264171]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0713/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 | 1930 | sanborn04023_011 p713","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0713/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0713","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"198.6,1949.0 207.9,0.0 680.0,0.0 675.5,190.7 1598.0,197.0 1598.0,641.3 1365.2,623.5 1362.0,1949.0 198.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0713/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65456361058612,42.92469490790817]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65067361516584,42.92486723267168]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6503886062546,42.921368518450016]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65427860167487,42.921196193686505]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0714/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 | 1930 | sanborn04023_011 p714","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0714/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0714","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,508.8 227.1,522.0 226.1,92.2 516.6,93.5 515.6,180.8 1344.6,190.7 1328.5,1949.0 -0.0,1949.0 -0.0,508.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0714/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65122228408981,42.92465931550008]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64723402361616,42.92482884551872]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64695363748402,42.92124174354649]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65094189795767,42.92107221352785]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0715__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 | 1930 | sanborn04023_011 p715 [1]","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":"6392.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0715__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0715","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1598.0,841.9 1038.6,71.5 62.7,7.8 69.0,1727.5 1598.0,1835.9 1598.0,841.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0715__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[69.0,1082.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.647737,42.923003]}},{"type":"Feature","properties":{"resourceCoords":[69.0,1728.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.647667,42.921901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0716/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 | 1930 | sanborn04023_011 p716","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0716/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0716","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"38.8,162.9 576.9,193.7 575.1,282.9 1387.2,324.8 1389.5,480.4 1598.0,479.4 1598.0,1949.0 -0.0,1949.0 -0.0,1793.8 52.2,1797.2 38.8,162.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0716/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64439083296759,42.92507631959296]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64048098060267,42.92518762353051]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64029689356585,42.92167106533884]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64420674593076,42.92155976140129]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0717/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 | 1930 | sanborn04023_011 p717","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0717/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0717","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,246.0 1536.0,375.2 1537.0,60.8 1598.0,60.8 1598.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0717/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65757844244861,42.92116154053074]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65365435005695,42.921334345122695]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65336856431253,42.917804756671174]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65729265670419,42.91763195207922]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0718__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 | 1930 | sanborn04023_011 p718 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6392.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0718__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0718","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1598.0,1949.0 1598.0,1915.3 1328.2,1914.9 1332.2,400.2 1270.6,399.3 1104.8,341.9 1091.4,326.5 1070.4,302.5 1012.3,282.5 1017.9,242.5 1022.5,209.6 1023.5,202.6 259.5,198.7 248.3,1949.0 1598.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0718__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[674.0,828.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6525184,42.9201334]}},{"type":"Feature","properties":{"resourceCoords":[172.0,1705.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.653617,42.918487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0719/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 | 1930 | sanborn04023_011 p719","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0719/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0719","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1346.0,1680.7 1341.2,1949.0 -0.0,1949.0 -0.0,419.8 1362.4,394.1 1357.5,1030.9 945.4,990.4 910.3,1666.5 1346.0,1680.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0719/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6510283759184,42.92176913389736]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64710993777561,42.921952836228314]}},{"type":"Feature","properties":{"resourceCoords":[1598.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64680612652222,42.918428365287355]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65072456466501,42.9182446629564]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0720__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 | 1930 | sanborn04023_011 p720 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6392.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0720__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0720","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"12.9,1949.0 1598.0,1949.0 1598.0,849.0 1598.0,407.4 1166.7,512.7 1153.1,516.4 1171.5,333.2 1364.0,145.1 1364.0,129.5 4.9,36.4 12.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0720__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[623.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.646099,42.921856]}},{"type":"Feature","properties":{"resourceCoords":[623.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64599,42.920046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0721__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 | 1930 | sanborn04023_011 p721 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2444.8"},{"label":"split_canvas_h","value":"3865.6"}],"created":"2026-09-21T22:40:26Z","modified":"2026-09-21T22:40:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0721__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0721","type":"ImageService3","width":1598,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,966.4 437.9,966.1 428.2,313.6 13.2,286.3 -0.0,966.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023193006:04023_07_1930-0721__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64860976170061,42.92060233386641]}},{"type":"Feature","properties":{"resourceCoords":[611.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64711554067725,42.92063654839028]}},{"type":"Feature","properties":{"resourceCoords":[611.2,966.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6470421900311,42.91889436755643]}},{"type":"Feature","properties":{"resourceCoords":[0.0,966.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64853641105447,42.91886015303257]}}]}}]}