{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04023_016.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Grand Rapids, Michigan | 1950 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"105"},{"label":"placed","value":"87"},{"label":"unplaced","value":"18"},{"label":"fit sources","value":"georef-snap 65, georef 20, snap:0 1, georef-street 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"10 sheet(s) cut into 29 panels"},{"label":"unplaced pages","value":"p0__1 (tier 1, 42.78444,-85.51414 +/-243m); p0__2 (tier 2, 42.92981,-85.63071 +/-2261m); p610__2 (tier 2, 42.94642,-85.62584 +/-315m); p628__2 (tier 1, 42.94556,-85.63766 +/-121m); p629__2 (tier 1, 42.94405,-85.64357 +/-131m); p648__2 (tier 1, 42.92658,-85.63574 +/-100m); p721__1 (tier 1, 42.90530,-85.65693 +/-118m); p721__3 (tier 4, 42.93545,-85.63618 +/-3998m); p721__4 (tier 4, 42.93545,-85.63618 +/-3998m); p721__5 (tier 4, 42.93545,-85.63618 +/-3998m); p722__2 (tier 4, 42.93545,-85.63618 +/-3998m); p722__3 (tier 4, 42.93545,-85.63618 +/-3998m); p722__4 (tier 4, 42.93545,-85.63618 +/-3998m); p722__5 (tier 4, 42.93545,-85.63618 +/-3998m); p723__2 (tier 4, 42.93545,-85.63618 +/-3998m); p725__1 (tier 2, 42.90934,-85.66082 +/-683m); p725__2 (tier 1, 42.90857,-85.66152 +/-100m); p725__3 (tier 1, 42.90759,-85.65261 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0601/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 | 1950 | sanborn04023_016 p601","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0601/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0601","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1292.2,0.0 1293.0,62.1 1162.8,63.0 1204.3,1949.0 776.9,1949.0 771.1,1574.8 53.6,1573.7 56.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0601/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63473036065743,42.9519944345211]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63073798000865,42.95199088986113]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63074370190512,42.94848932311263]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6347360825539,42.9484928677726]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0602/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 | 1950 | sanborn04023_016 p602","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0602/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0602","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,25.4 1531.8,0.0 1531.4,60.8 1437.8,57.2 1416.3,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0602/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1046.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.629285,42.950039]}},{"type":"Feature","properties":{"resourceCoords":[1425.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.628358,42.950053]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0603/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 | 1950 | sanborn04023_016 p603","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0603/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0603","type":"ImageService3","width":1650,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1650.0,0.0 1650.0,544.9 1506.5,544.5 1523.2,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0603/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63951041998453,42.94924319916342]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63546681357107,42.94924663817515]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63546130283858,42.94572577624975]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63950490925204,42.945722337238024]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0604/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 | 1950 | sanborn04023_016 p604","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0604/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0604","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"344.5,520.9 488.3,522.1 491.5,0.0 791.0,0.0 787.6,396.3 843.5,396.8 844.3,22.5 1559.9,29.6 1562.5,402.9 1635.0,403.5 1635.0,536.2 1563.1,535.9 1628.8,827.6 1593.8,972.8 1503.1,1114.2 1344.5,981.5 1351.8,1949.0 352.7,1949.0 344.5,520.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0604/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63666774312618,42.949196501249524]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63267243546649,42.94921778572204]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63263801593875,42.94570706423996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63663332359845,42.945685779767445]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0605/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 | 1950 | sanborn04023_016 p605","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0605/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0605","type":"ImageService3","width":1650,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1735.1 -0.0,151.7 1500.5,144.2 1527.8,1746.8 -0.0,1735.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0605/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6394567288784,42.945997024459885]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63540320182975,42.94598555759973]}},{"type":"Feature","properties":{"resourceCoords":[1650.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63542157556213,42.94245587223039]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63947510261079,42.94246733909055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0606/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 | 1950 | sanborn04023_016 p606","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0606/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0606","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1524.0,1743.0 550.2,1742.0 538.9,161.2 1523.8,159.9 1524.0,1743.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0606/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[548.0,737.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6357392,42.944646]}},{"type":"Feature","properties":{"resourceCoords":[1524.0,1743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633306,42.9428318]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0607/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 | 1950 | sanborn04023_016 p607","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0607/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0607","type":"ImageService3","width":1644,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.9,740.2 207.0,873.0 297.9,732.8 328.1,500.1 269.7,298.1 341.2,298.8 341.9,166.8 1470.0,195.3 1458.2,1414.3 1644.0,1406.5 1644.0,1949.0 51.9,1949.0 49.9,740.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0607/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63351050066953,42.94878532556134]}},{"type":"Feature","properties":{"resourceCoords":[1644.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62947159919884,42.94882268978676]}},{"type":"Feature","properties":{"resourceCoords":[1644.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62941150800327,42.945293065742334]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63345040947397,42.94525570151691]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0608/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 | 1950 | sanborn04023_016 p608","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0608/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0608","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1620.4,1577.1 977.4,1781.3 77.6,1738.5 91.6,398.8 1393.1,402.7 1635.0,436.2 1635.0,1949.0 1611.3,1949.0 1620.4,1577.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0608/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63356302822791,42.94597597030939]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62954915676319,42.946022035803715]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62947466728605,42.9424948167216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63348853875077,42.942448751227275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0609/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 | 1950 | sanborn04023_016 p609","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0609/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0609","type":"ImageService3","width":1644,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,0.0 1644.0,-0.0 1644.0,326.6 1554.2,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0609/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[106.0,1443.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.627139,42.958094]}},{"type":"Feature","properties":{"resourceCoords":[30.0,534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.624932,42.95823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0610__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 | 1950 | sanborn04023_016 p610 [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":"3946.8"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0610__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0610","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"475.3,1228.2 478.4,1949.0 903.5,1949.0 919.2,227.2 49.4,231.2 48.3,697.8 76.2,814.6 300.0,1228.9 475.3,1228.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0610__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":[-85.6270994696831,42.94954763167641]}},{"type":"Feature","properties":{"resourceCoords":[986.7,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62464081776199,42.94956347993809]}},{"type":"Feature","properties":{"resourceCoords":[986.7,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62459836346905,42.945984605655724]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62705701539016,42.94596875739404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0611/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 | 1950 | sanborn04023_016 p611","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0611/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0611","type":"ImageService3","width":1644,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"62.9,0.0 63.1,36.4 1489.0,57.3 1509.0,1654.4 1644.0,1652.0 1644.0,1879.8 1511.9,1887.5 1512.6,1949.0 1276.6,1949.0 945.1,1810.0 712.3,1640.3 629.6,1641.8 634.7,1949.0 -0.0,1949.0 -0.0,-0.0 62.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0611/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62851752279201,42.95558616910712]}},{"type":"Feature","properties":{"resourceCoords":[1644.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6245205877693,42.9555712175262]}},{"type":"Feature","properties":{"resourceCoords":[1644.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6245446363772,42.95207865399967]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62854157139991,42.95209360558059]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0612/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 | 1950 | sanborn04023_016 p612","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0612/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0612","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.7,415.8 141.3,418.7 141.2,358.3 -0.0,359.3 -0.0,294.0 613.2,305.3 613.7,0.0 695.9,0.0 924.2,172.9 1251.0,317.1 1485.5,321.4 1488.2,1949.0 41.1,1949.0 47.7,415.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0612/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6285082707291,42.9526234727017]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62450889277044,42.95266294686439]}},{"type":"Feature","properties":{"resourceCoords":[1635.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6244450548273,42.94914884250901]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62844443278597,42.94910936834632]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0613/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 | 1950 | sanborn04023_016 p613","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0613/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0613","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,680.6 634.5,669.4 631.9,325.9 1190.8,320.1 1192.5,793.4 1221.4,911.7 1477.4,1377.0 1123.3,1616.3 734.3,1791.4 548.0,1853.3 -0.0,1900.2 -0.0,680.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0613/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.629898039313,42.94969696561385]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6258166182439,42.949705750481506]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6258026427549,42.94617764751052]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62988406382401,42.946168862642864]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0614/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 | 1950 | sanborn04023_016 p614","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0614/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0614","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"135.5,1949.0 133.4,1128.6 -0.0,1095.5 183.4,1095.7 183.6,550.0 548.1,516.2 886.5,403.4 1321.9,166.9 1487.2,46.9 1461.2,0.0 1640.0,0.0 1640.0,1949.0 135.5,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0614/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62989423109025,42.947261633189804]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62588827998366,42.94730003906739]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62582636442131,42.943790585521235]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6298323155279,42.943752179643646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0615/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 | 1950 | sanborn04023_016 p615","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0615/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0615","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"129.6,1614.7 133.6,1289.0 -0.0,1287.4 0.0,-0.0 1156.0,-0.0 1336.2,99.3 1446.6,-0.0 1594.0,80.9 1662.0,81.3 1662.0,1817.0 67.6,1808.0 129.6,1614.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0615/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62049695025499,42.955633658770154]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62044423308409,42.952650292856696]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62519079593713,42.95260472684449]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62524351310803,42.95558809275795]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0616/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 | 1950 | sanborn04023_016 p616","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0616/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0616","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.4,1608.2 89.6,338.8 175.1,335.4 705.8,183.5 717.6,183.3 574.5,221.1 971.0,221.4 971.9,766.7 1125.4,827.0 1585.2,1086.6 1478.5,1304.7 1468.6,1622.8 79.4,1608.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0616/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62531751378826,42.953384468581426]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61744554002375,42.95346412269959]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61731711737009,42.94656829797085]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6251890911346,42.94648864385268]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0617/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 | 1950 | sanborn04023_016 p617","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0617/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0617","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1562.0,1795.6 518.6,1801.2 -0.0,1694.7 -0.0,-0.0 1662.0,0.0 1662.0,808.1 1568.2,868.7 1562.0,1795.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0617/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61877972674972,42.95587912404133]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61525852130728,42.9544936800863]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61746276689395,42.95145011925803]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62098397233639,42.95283556321306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0618/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 | 1950 | sanborn04023_016 p618","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0618/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0618","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1562.7,1879.5 505.6,1884.4 517.0,860.4 476.1,543.0 1459.7,0.0 1632.8,0.0 1570.6,365.2 1562.7,1879.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0618/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62234184268598,42.950417500701775]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62043532243382,42.953058699891685]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61617697498241,42.951388619155736]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61808349523457,42.94874741996583]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0619/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 | 1950 | sanborn04023_016 p619","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0619/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0619","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.8,1815.2 114.0,907.9 205.1,848.6 200.8,57.6 -0.0,57.5 -0.0,0.0 1373.0,0.0 1372.8,114.4 1504.8,113.4 1662.0,194.5 1662.0,1827.4 112.8,1815.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0619/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[875.0,408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6142023,42.9533615]}},{"type":"Feature","properties":{"resourceCoords":[617.0,1827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6164188,42.9513236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0620/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 | 1950 | sanborn04023_016 p620","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0620/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0620","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1329.3,1770.2 1160.2,1843.3 295.4,1843.2 292.0,202.1 166.4,129.8 -0.0,124.0 -0.0,-0.0 1640.0,0.0 1640.0,1949.0 1446.4,1949.0 1329.3,1770.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0620/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61263231360361,42.9535984866374]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60911477168426,42.95218928280409]}},{"type":"Feature","properties":{"resourceCoords":[1640.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61138681799973,42.94910799759268]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61490435991908,42.95051720142598]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0621/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 | 1950 | sanborn04023_016 p621","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0621/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0621","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"101.0,173.0 1662.0,166.7 1662.0,1297.3 117.2,1237.6 101.0,173.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0621/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1115.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.615513,42.948698]}},{"type":"Feature","properties":{"resourceCoords":[101.0,173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6164188,42.9513236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0622/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 | 1950 | sanborn04023_016 p622","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0622/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0622","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"335.8,1298.9 211.6,1294.4 207.0,164.2 545.0,169.1 711.9,96.5 829.9,274.1 1020.3,274.1 1018.7,0.0 1642.0,0.0 1642.0,793.0 1603.9,815.0 1517.0,655.6 335.8,1298.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0622/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6132735,42.9504291]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6097137,42.9490031]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61202619999999,42.9459103]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.615586,42.9473363]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0623/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 | 1950 | sanborn04023_016 p623","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0623/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0623","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.9,1802.5 40.4,396.4 219.3,0.0 310.4,0.0 1662.0,778.0 1662.0,806.5 1413.7,808.5 1422.8,1949.0 607.7,1949.0 606.5,1803.0 45.9,1802.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0623/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61822340619086,42.94955067985529]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61418524993861,42.949520866599315]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61423267857163,42.94603015828671]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61827083482387,42.94605997154269]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0624/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 | 1950 | sanborn04023_016 p624","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0624/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0624","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1483.3,919.5 1495.9,1924.5 231.4,1942.1 211.9,949.5 46.2,952.4 28.1,0.0 585.6,0.0 587.0,145.2 1397.7,144.5 1404.5,920.4 1483.3,919.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0624/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61822451770075,42.946322156593794]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61421313052685,42.94628990587337]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6142650589727,42.94277991449558]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61827644614661,42.942812165216004]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0625/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 | 1950 | sanborn04023_016 p625","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0625/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0625","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1662.0,0.0 1662.0,183.1 1636.2,183.7 1662.0,206.0 1662.0,805.5 1518.3,721.4 1499.3,1907.0 -0.0,1917.3 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0625/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6148082213545,42.94807738653623]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61076252180318,42.9480712918855]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6107722172854,42.944573977498436]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61481791683671,42.944580072149165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0626/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 | 1950 | sanborn04023_016 p626","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0626/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0626","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"154.4,312.7 161.9,18.6 147.7,0.0 1642.0,0.0 1642.0,1917.1 952.9,1900.3 955.0,1949.0 -0.0,1949.0 -0.0,862.7 58.6,864.7 83.2,268.9 154.4,312.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0626/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61154890364126,42.94772938673523]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60360408800112,42.94786527618083]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60338528688487,42.940913474246805]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61133010252502,42.94077758480121]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0627/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 | 1950 | sanborn04023_016 p627","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0627/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0627","type":"ImageService3","width":1655,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1655.0,1949.0 115.6,1949.0 109.3,664.5 1655.0,631.4 1655.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0627/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1120.0,1434.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.613349,42.942823]}},{"type":"Feature","properties":{"resourceCoords":[106.0,86.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.610023,42.944659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__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 | 1950 | sanborn04023_016 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":"4394.4"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1051.8,937.7 63.7,927.8 64.6,0.0 0.0,-0.0 -0.0,1896.1 1069.0,1901.3 1051.8,937.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[93.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639405,42.941041]}},{"type":"Feature","properties":{"resourceCoords":[93.0,928.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.639398,42.9428542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__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 | 1950 | sanborn04023_016 p628 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4345.6"},{"label":"split_canvas_y","value":"4221.6"},{"label":"split_canvas_w","value":"2222.4"},{"label":"split_canvas_h","value":"3574.4"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1642.0,1949.0 1642.0,1055.4 1086.4,1055.4 1098.6,1949.0 1642.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0628__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1086.4,1055.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62579409922758,42.93445500857034]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1055.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62441908990142,42.934499044008064]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62432232217282,42.93288132581792]}},{"type":"Feature","properties":{"resourceCoords":[1086.4,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62569733149897,42.93283729038019]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1133.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.62447,42.934356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__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 | 1950 | sanborn04023_016 p629 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2380.4"},{"label":"split_canvas_h","value":"2030.8"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 0.0,507.7 591.0,498.4 582.0,-0.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__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":[-85.6081200178075,42.934550044728745]}},{"type":"Feature","properties":{"resourceCoords":[595.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60666019828132,42.93440691712357]}},{"type":"Feature","properties":{"resourceCoords":[595.1,507.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60682720565768,42.93349494741617]}},{"type":"Feature","properties":{"resourceCoords":[0.0,507.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60828702518386,42.93363807502135]}},{"type":"Feature","properties":{"resourceCoords":[580.1,36.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.606709,42.934345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__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 | 1950 | sanborn04023_016 p629 [3]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1993.2"},{"label":"split_canvas_w","value":"6648.0"},{"label":"split_canvas_h","value":"5802.8"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.0,1830.8 1556.3,1830.4 1576.4,1470.9 1642.2,1105.5 1643.0,815.4 158.5,822.2 178.0,1830.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0629__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[669.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635701,42.941018]}},{"type":"Feature","properties":{"resourceCoords":[158.0,822.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63694,42.942831]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0630/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 | 1950 | sanborn04023_016 p630","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0630/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0630","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1642.0,1818.0 20.5,1818.8 38.9,1462.6 102.9,1100.4 102.4,813.0 1003.6,833.6 1642.0,613.6 1642.0,1818.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0630/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63353935407679,42.94430366329723]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62951126659495,42.944277136100524]}},{"type":"Feature","properties":{"resourceCoords":[1642.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62955397790385,42.94075241511952]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6335820653857,42.94077894231622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0631/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 | 1950 | sanborn04023_016 p631","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0631/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0631","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1824.1 -0.0,0.0 430.1,0.0 435.9,158.9 1462.3,127.2 1610.0,1790.0 -0.0,1824.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0631/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64068504788723,42.94135363015064]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63665596606432,42.941238556652145]}},{"type":"Feature","properties":{"resourceCoords":[1662.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63683900697289,42.937755224563944]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6408680887958,42.937870298062435]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0632/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 | 1950 | sanborn04023_016 p632","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0632/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0632","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"294.8,0.0 282.4,131.3 1642.0,231.0 1642.0,1464.0 697.7,1749.9 402.9,1101.2 -0.0,1075.8 -0.0,-0.0 294.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0632/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[423.0,1132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.640369,42.936293]}},{"type":"Feature","properties":{"resourceCoords":[1150.0,1615.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.638501,42.935489]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0633/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 | 1950 | sanborn04023_016 p633","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0633/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0633","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1623.2,1844.2 142.6,1843.0 40.3,181.6 1529.4,170.4 1623.2,1844.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0633/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63724498938805,42.94135149899795]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63320883625614,42.941317049794336]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63326373178808,42.93782129686645]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63729988491998,42.93785574607007]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0634/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 | 1950 | sanborn04023_016 p634","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0634/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0634","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1651.0,1847.4 178.0,1839.0 91.6,185.1 1651.0,185.7 1651.0,1847.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0634/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1050.0,190.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.631152,42.940991]}},{"type":"Feature","properties":{"resourceCoords":[140.0,947.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633423,42.93963]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0635/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 | 1950 | sanborn04023_016 p635","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0635/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0635","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"26.5,71.8 1637.9,181.4 1649.8,1949.0 21.4,1949.0 26.5,71.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0635/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63754648668917,42.938176355481936]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63346463207478,42.938342106845454]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63320051727264,42.934806590849966]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63728237188704,42.93464083948645]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0636/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 | 1950 | sanborn04023_016 p636","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0636/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0636","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1651.0,1730.0 55.4,1722.3 47.0,196.6 1651.0,308.5 1651.0,1730.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0636/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63363294821218,42.938357761371876]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62962804403814,42.93852445570775]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62936113856375,42.93503879570942]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63336604273779,42.93487210137354]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0637/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 | 1950 | sanborn04023_016 p637","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0637/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0637","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1804.0 -0.0,-0.0 1472.8,0.0 1457.6,1780.7 1111.3,1776.7 1112.9,1949.0 93.2,1949.0 91.0,1802.5 -0.0,1804.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0637/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65153206068086,42.936690709706525]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64751255337946,42.93685500020569]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64725077255632,42.93337340441782]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65127027985773,42.93320911391866]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0638/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 | 1950 | sanborn04023_016 p638","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0638/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0638","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1651.0,0.0 1651.0,384.7 1651.0,384.7 1651.0,1948.4 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0638/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64796633043669,42.93687805234832]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64390011501645,42.93701855441786]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64367515326457,42.93347944531993]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6477413686848,42.93333894325039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0639/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 | 1950 | sanborn04023_016 p639","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0639/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0639","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1659.0,1076.1 1172.9,1247.0 1345.5,1746.3 710.2,1949.0 227.6,1949.0 201.2,1599.2 179.4,1607.2 91.8,0.0 1503.1,0.0 1659.0,283.6 1659.0,1076.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0639/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64408187647484,42.9363665894088]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64004486942937,42.93634390028752]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64008102209276,42.93284712444966]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64411802913823,42.93286981357094]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0640/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 | 1950 | sanborn04023_016 p640","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0640/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0640","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"490.8,815.4 545.7,41.4 704.7,395.6 1649.3,118.4 1646.3,872.6 1371.0,858.0 1369.8,1854.9 1342.5,1798.0 189.1,1707.4 -0.0,949.8 490.8,815.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0640/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64139876832262,42.93583539276625]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63733821009271,42.93602491751281]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6370347618403,42.932490673276774]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6410953200702,42.932301148530215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0641/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 | 1950 | sanborn04023_016 p641","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0641/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0641","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1640.0,134.8 1526.1,1949.0 267.1,1949.0 266.2,1672.5 226.0,1672.8 -0.0,1675.1 -0.0,0.0 1415.5,-0.0 1414.8,136.9 1640.0,134.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0641/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62918660583614,42.935438325673424]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62897799542709,42.93246185466627]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63372061978826,42.932281158137535]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63392923019731,42.93525762914469]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0642/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 | 1950 | sanborn04023_016 p642","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0642/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0642","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"360.5,309.0 1612.3,322.1 1620.2,214.9 1651.0,215.6 1651.0,1856.1 1450.5,1949.0 447.9,1949.0 462.4,1672.2 350.9,1671.7 360.5,309.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0642/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63319459638548,42.935462988475614]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63294380795665,42.93248585010157]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63771048570314,42.93226756693028]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63796127413197,42.93524470530432]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0643/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 | 1950 | sanborn04023_016 p643","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0643/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0643","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1448.6,1812.4 1446.8,1949.0 -0.0,1949.0 -0.0,-0.0 94.0,0.0 94.0,147.1 1118.0,163.5 1119.0,0.0 1466.8,0.0 1481.0,1815.0 1448.6,1812.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0643/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65129616018018,42.93346778129012]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64729820323775,42.93367860955274]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64696228636946,42.93021550155137]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65096024331189,42.93000467328875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0644/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 | 1950 | sanborn04023_016 p644","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0644/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0644","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1651.0,233.7 1651.0,1949.0 -0.0,1814.4 -0.0,206.9 1651.0,233.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0644/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64771504997024,42.93371578652322]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64366055128716,42.93391764517413]}},{"type":"Feature","properties":{"resourceCoords":[1651.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6433373667698,42.93038854883009]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64739186545289,42.930186690179184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0645/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 | 1950 | sanborn04023_016 p645","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0645/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0645","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"229.8,1861.2 218.9,1638.8 289.8,1638.2 277.8,250.2 749.5,281.6 1409.8,121.9 1465.7,379.3 1462.4,1949.0 972.1,1949.0 894.0,1907.5 229.8,1861.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0645/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64427294091645,42.93328449847724]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64025372547908,42.93345888918207]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63997586547038,42.92997736448785]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64399508090774,42.92980297378302]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0646/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 | 1950 | sanborn04023_016 p646","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0646/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0646","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1063.0,1484.0 1060.7,1678.0 64.1,1674.4 79.4,339.1 1247.8,436.6 1657.0,1342.7 1657.0,1542.2 1063.0,1484.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0646/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64091672633698,42.933357941490335]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63689631165245,42.933560102886865]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63657381554444,42.93007333318772]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64059423022897,42.92987117179119]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0647/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 | 1950 | sanborn04023_016 p647","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0647/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0647","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1639.0,275.1 1316.3,282.0 1322.0,549.0 1639.0,546.0 1562.2,1862.3 125.8,1851.7 224.3,151.5 -0.0,154.7 0.0,-0.0 1639.0,-0.0 1639.0,275.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0647/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6289638717851,42.932900352796516]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62877610468354,42.92994748991872]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63353833204961,42.929782856336786]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63372609915118,42.932735719214584]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0648__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 | 1950 | sanborn04023_016 p648 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6628.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0648__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0648","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.5,1651.8 885.2,1324.7 1077.2,1309.0 1068.0,1881.0 1553.6,1847.0 1529.2,-0.0 165.8,72.2 286.5,1651.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0648__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[651.0,34.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633391,42.93156]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,1881.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6380921,42.9308328]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0649/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 | 1950 | sanborn04023_016 p649","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0649/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0649","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,224.4 1431.3,215.7 1419.8,1816.4 -0.0,1710.0 -0.0,224.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0649/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6509775867893,42.93040682391851]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64700442200014,42.93059834224024]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64669556371983,42.92711454053434]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65066872850899,42.92692302221261]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0650/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 | 1950 | sanborn04023_016 p650","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0650/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0650","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1805.0 -0.0,88.4 1636.6,210.6 1626.1,1934.3 -0.0,1805.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0650/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64750540437812,42.93059138476596]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64344000304567,42.93076563224877]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64316204915734,42.92723968471459]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6472274504898,42.92706543723178]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0651/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 | 1950 | sanborn04023_016 p651","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0651/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0651","type":"ImageService3","width":1639,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1441.5,1760.4 207.6,1667.8 210.1,151.0 871.6,197.2 949.4,238.4 1437.6,238.4 1441.5,1760.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0651/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64398358732849,42.93023277159668]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63999646593462,42.93040561957883]}},{"type":"Feature","properties":{"resourceCoords":[1639.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63971771804063,42.92690956705508]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6437048394345,42.92673671907293]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0652/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 | 1950 | sanborn04023_016 p652","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0652/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0652","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.5,1748.2 65.0,0.0 1057.2,0.0 1054.8,308.6 1505.5,342.6 1496.4,1866.8 58.5,1748.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0652/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64064270584434,42.93036275547503]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63660333065899,42.930554910102586]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63629681277601,42.927051524950336]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64033618796137,42.92685937032278]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0653/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 | 1950 | sanborn04023_016 p653","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0653/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0653","type":"ImageService3","width":1646,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.4,1662.3 -0.0,1656.7 -0.0,125.6 1495.5,209.2 1500.5,1765.0 1415.8,1758.7 1417.7,1949.0 62.3,1949.0 67.4,1662.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0653/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63693648858487,42.930146485475476]}},{"type":"Feature","properties":{"resourceCoords":[1646.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63294047051359,42.93031888499133]}},{"type":"Feature","properties":{"resourceCoords":[1646.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63266362854232,42.92682992837722]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6366596466136,42.92665752886136]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0654/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 | 1950 | sanborn04023_016 p654","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0654/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0654","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,1755.3 84.2,1762.5 94.3,214.0 1385.9,317.4 1389.7,0.0 1657.0,0.0 1657.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0654/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63354153891042,42.930301732736105]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62950218254718,42.93050505323771]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6291778537721,42.92700167908464]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63321721013534,42.926798358583035]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0655/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 | 1950 | sanborn04023_016 p655","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0655/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0655","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1626.0,1949.0 -0.0,1949.0 -0.0,17.8 10.7,0.0 1585.0,0.0 1583.4,417.0 1626.0,416.5 1626.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0655/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61109945652849,42.93735231845828]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60318077338788,42.93727283095876]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6033099969972,42.93027453138279]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61122868013781,42.93035401888231]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0656/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 | 1950 | sanborn04023_016 p656","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0656/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0656","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"96.6,1949.0 112.6,1856.1 107.8,857.9 -0.0,858.3 -0.0,475.6 105.5,475.1 102.0,0.0 1463.7,0.0 1465.9,860.9 1548.6,860.6 1551.3,1355.9 1657.0,1355.8 1657.0,1858.2 1292.8,1858.5 1292.2,1949.0 96.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0656/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62532980600011,42.947697135863216]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61721463704373,42.94771640840277]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6171838865082,42.940679814467636]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62529905546458,42.94066054192808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0657/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 | 1950 | sanborn04023_016 p657","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0657/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0657","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 0.0,0.0 1626.0,0.0 1626.0,1949.0 1348.4,1949.0 1349.6,1690.2 374.8,1685.7 373.6,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0657/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63023254270468,42.96430569245936]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62233836847658,42.96433760252022]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62228646916526,42.95736402969776]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63018064339336,42.9573321196369]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0658/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 | 1950 | sanborn04023_016 p658","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0658/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0658","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1221.5,1949.0 266.7,1949.0 247.2,1123.8 199.0,1127.2 199.4,443.3 -0.0,449.0 -0.0,-0.0 1657.0,-0.0 1657.0,448.9 1241.3,441.9 1221.5,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0658/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60121811014166,42.94174456716039]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60122249227241,42.93577663910527]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61074385683332,42.935780439147116]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61073947470257,42.94174836720224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0659/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 | 1950 | sanborn04023_016 p659","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0659/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0659","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1626.0,1949.0 931.5,1949.0 903.7,1912.5 854.5,1949.0 629.0,1949.0 626.3,1579.7 116.9,1583.2 113.5,1050.6 386.6,1049.2 383.1,375.2 686.7,367.1 683.4,245.0 1626.0,242.2 1626.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0659/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60954548360183,42.94321785701691]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.60957285354779,42.93742856998737]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61898554246326,42.93745275620253]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.61895817251731,42.943242043232075]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0660/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 | 1950 | sanborn04023_016 p660","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0660/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0660","type":"ImageService3","width":1657,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.8,1002.4 202.1,1002.6 217.5,229.8 974.6,225.1 973.2,0.0 1189.9,0.0 1191.3,1007.0 1174.8,1100.7 1657.0,1102.4 1657.0,1949.0 194.5,1949.0 179.1,1845.3 167.2,1845.3 179.8,1002.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0660/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63056456380625,42.944572655544434]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62252122494591,42.944612220241865]}},{"type":"Feature","properties":{"resourceCoords":[1657.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.62245810014319,42.93763756344723]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63050143900352,42.9375979987498]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0701/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 | 1950 | sanborn04023_016 p701","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0701/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0701","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 0.0,0.0 1268.8,21.6 1271.2,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0701/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66724449003607,42.92758794466536]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66326766680606,42.92768446724042]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66311076947076,42.92416941151329]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66708759270077,42.924072888938234]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0702/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 | 1950 | sanborn04023_016 p702","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0702/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0702","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 32.6,0.0 31.2,189.7 1308.8,199.4 1308.7,237.3 1653.0,239.0 1653.0,1618.4 259.9,1550.1 260.7,1484.3 198.5,1483.6 193.4,1949.0 -0.0,1949.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0702/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66718220022793,42.9244109490321]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66316097874243,42.924531122644254]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66296883719728,42.921034700985054]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66699005868279,42.9209145273729]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0703/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 | 1950 | sanborn04023_016 p703","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0703/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0703","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.8,1949.0 137.9,0.0 1638.0,0.0 1638.0,1943.3 134.8,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0703/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66447958456793,42.92761538085368]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66044063634466,42.92772180278405]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66026891487941,42.92417799044534]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66430786310268,42.92407156851497]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0704/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 | 1950 | sanborn04023_016 p704","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0704/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0704","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"481.6,235.1 1090.3,225.6 1100.1,588.9 1247.9,1202.8 1272.4,1949.0 726.3,1949.0 723.0,1613.0 510.2,1603.6 481.6,235.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0704/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66433000819106,42.92451063458875]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66027507590483,42.924569217704004]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6601814092092,42.92104348941578]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66423634149542,42.920984906300525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0705/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 | 1950 | sanborn04023_016 p705","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0705/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0705","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 61.2,0.0 61.0,65.1 1638.0,128.1 1638.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0705/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[533.0,1436.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.665126,42.9191848]}},{"type":"Feature","properties":{"resourceCoords":[578.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.665113,42.921653]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0706/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 | 1950 | sanborn04023_016 p706","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0706/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0706","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1604.4,0.0 1620.9,1949.0 136.1,1949.0 136.1,1727.7 136.2,1680.7 131.7,984.0 -0.0,364.4 0.0,-0.0 1604.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0706/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6616445307769,42.92414112626964]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65760519917346,42.9242795348972]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6573839030975,42.920767353585]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66142323470093,42.920628944957436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0707/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 | 1950 | sanborn04023_016 p707","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0707/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0707","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1573.6,102.7 1568.5,1949.0 48.9,1949.0 49.2,1748.3 -0.0,1747.9 -0.0,-0.0 1638.0,0.0 1638.0,107.1 1573.6,102.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0707/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6580749420242,42.92739798528442]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65410143167503,42.92755800606122]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65384322421053,42.924071601243014]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6578167345597,42.92391158046622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0708/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 | 1950 | sanborn04023_016 p708","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0708/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0708","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"56.4,1949.0 64.5,157.0 1584.1,164.6 1577.8,1949.0 56.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0708/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6578762758465,42.924190257213674]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65386835637294,42.92436653889055]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65358650637535,42.92088167278928]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65759442584891,42.9207053911124]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0709/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 | 1950 | sanborn04023_016 p709","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0709/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0709","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1424.8,1107.3 1602.9,1105.8 1557.6,1840.5 3.9,1836.9 116.8,-0.0 1499.2,-0.0 1424.8,1107.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0709/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6453207824613,42.92750954948907]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64512544828638,42.92454570779188]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64990788314358,42.924374319931765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6501032173185,42.92733816162896]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0710/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 | 1950 | sanborn04023_016 p710","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0710/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0710","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"13.1,1861.0 -0.0,433.4 82.5,431.4 102.3,76.2 1646.7,69.2 1609.7,746.2 1653.0,745.9 1653.0,1844.3 13.1,1861.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0710/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6496498232471,42.92753306461306]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64947969702531,42.92452310593446]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65429247665904,42.9243751904007]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65446260288083,42.9273851490793]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0711/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 | 1950 | sanborn04023_016 p711","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0711/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0711","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1496.3,1671.8 1484.0,1875.5 6.9,1889.3 116.8,-0.0 1638.0,-0.0 1638.0,1671.8 1496.3,1671.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0711/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63654834159132,42.92738753389883]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63638596350042,42.92444770183674]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64112964698676,42.92430522963604]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64129202507766,42.92724506169813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0712/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 | 1950 | sanborn04023_016 p712","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0712/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0712","type":"ImageService3","width":1653,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1464.5,1305.8 1436.5,1739.2 53.4,1742.6 165.2,51.5 1630.6,45.7 1653.0,1304.6 1464.5,1305.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0712/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64103834050633,42.92754021724276]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64085131732818,42.92455026876984]}},{"type":"Feature","properties":{"resourceCoords":[1653.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64563209603729,42.9243876620586]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64581911921543,42.927377610531515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0713/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 | 1950 | sanborn04023_016 p713","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0713/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0713","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"702.5,1785.4 701.4,1949.0 234.1,1949.0 243.1,181.4 1638.0,179.3 1638.0,1695.8 1334.1,1693.7 1333.5,1786.2 702.5,1785.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0713/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65465126585858,42.92468170195436]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65067217424085,42.92485994599087]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65038457441581,42.92136849288566]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65436366603353,42.92119024884916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0714/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 | 1950 | sanborn04023_016 p714","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0714/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0714","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1414.6,1572.5 292.9,1560.1 276.6,58.5 1414.8,130.1 1414.6,1572.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0714/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65133194494061,42.92461969606892]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64725955950234,42.92476952054893]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64702087561426,42.92124143215657]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65109326105252,42.921091607676566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0715/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 | 1950 | sanborn04023_016 p715","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0715/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0715","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1638.0,1803.0 82.1,1684.2 85.9,50.3 1638.0,161.2 1638.0,1803.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0715/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64808361399159,42.924916195482254]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64409658603321,42.92507169473488]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64384568449977,42.921573289172244]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64783271245814,42.921417789919616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0716/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 | 1950 | sanborn04023_016 p716","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0716/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0716","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1659.0,1876.2 207.2,1792.4 189.8,342.9 1659.0,326.2 1659.0,1876.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0716/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6445486591358,42.92504440804869]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64050169362206,42.925166484885956]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64030721302841,42.92166044052008]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64435417854214,42.921538363682814]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0717/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 | 1950 | sanborn04023_016 p717","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0717/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0717","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1638.0,1569.8 1638.0,1949.0 -0.0,1949.0 -0.0,204.9 54.0,235.2 1575.2,231.5 1561.5,1565.0 1638.0,1569.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0717/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65762133462393,42.92112667623819]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6536485368047,42.9212941880323]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65337826951739,42.917808052602076]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65735106733662,42.917640540807966]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0718/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 | 1950 | sanborn04023_016 p718","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0718/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0718","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"698.3,164.3 699.2,0.0 1333.0,0.0 1321.7,1928.4 287.5,1949.0 288.1,1698.6 211.4,1693.7 228.8,164.9 698.3,164.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0718/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65437233930837,42.92148548770522]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65035986618881,42.92166173378046]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65007910433975,42.918185376512525]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65409157745931,42.918009130437284]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0719/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 | 1950 | sanborn04023_016 p719","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0719/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0719","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1391.4,16.2 1381.7,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0719/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65116045686813,42.9217928329384]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64705041163914,42.921955533497844]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64678790460694,42.91834899486499]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65089794983592,42.91818629430555]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0720/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 | 1950 | sanborn04023_016 p720","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"22"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0720/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0720","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1104.9 126.6,1094.4 49.0,88.7 1564.4,76.0 1559.1,0.0 1659.0,0.0 1659.0,1949.0 -0.0,1949.0 -0.0,1104.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0720/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[661.0,1577.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644906,42.916556]}},{"type":"Feature","properties":{"resourceCoords":[482.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.645639,42.920042]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0721__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 | 1950 | sanborn04023_016 p721 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"2525.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4026.4"},{"label":"split_canvas_h","value":"6540.8"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0721__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0721","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1638.0,-0.0 935.3,0.0 933.8,635.9 632.4,635.9 631.9,951.1 631.4,1225.1 1163.9,1225.2 1164.5,1635.2 1638.0,1628.5 1638.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0721__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[631.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.6546283328476,42.90623188472188]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65461635485187,42.90440796636328]}},{"type":"Feature","properties":{"resourceCoords":[1638.0,1635.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65866359694569,42.9043937362965]}},{"type":"Feature","properties":{"resourceCoords":[631.4,1635.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65867557494141,42.9062176546551]}},{"type":"Feature","properties":{"resourceCoords":[949.3,794.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65659,42.905649]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0722__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 | 1950 | sanborn04023_016 p722 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6636.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0722__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0722","type":"ImageService3","width":1659,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1659.0,-0.0 -0.0,0.0 -0.0,1949.0 672.6,1949.0 672.7,1639.0 838.8,1640.1 839.0,1610.5 1071.2,1610.5 1074.2,1254.9 762.6,1253.0 755.4,822.4 753.9,734.6 815.6,734.9 1659.0,738.4 1659.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0722__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":[-85.65104209783352,42.913995126191296]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65095302187672,42.910990951811776]}},{"type":"Feature","properties":{"resourceCoords":[1659.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65577645313246,42.91091438149444]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65586552908927,42.91391855587396]}},{"type":"Feature","properties":{"resourceCoords":[622.0,1140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65383,42.912824]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0723__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 | 1950 | sanborn04023_016 p723 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3216.8"},{"label":"split_canvas_w","value":"6552.0"},{"label":"split_canvas_h","value":"4579.2"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0723__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0723","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1257.1,1949.0 1638.0,1949.0 1638.0,823.8 949.4,811.1 949.2,828.3 103.2,824.8 100.2,1467.9 200.7,1475.3 165.6,1949.0 1257.1,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0723__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1068.0,1067.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635763,42.923626]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,1605.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.635646,42.921733]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__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 | 1950 | sanborn04023_016 p724 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3972.8"},{"label":"split_canvas_w","value":"6672.0"},{"label":"split_canvas_h","value":"3823.2"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724","type":"ImageService3","width":1668,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.6,1864.0 -0.0,1861.3 -0.0,1949.0 1668.0,1949.0 1668.0,993.2 371.6,1006.3 370.9,1863.8 282.6,1864.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1284.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6655593,42.9040453]}},{"type":"Feature","properties":{"resourceCoords":[143.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.665758,42.9081797]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__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 | 1950 | sanborn04023_016 p724 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6672.0"},{"label":"split_canvas_h","value":"4040.4"}],"created":"2026-09-23T19:35:30Z","modified":"2026-09-23T19:35:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724","type":"ImageService3","width":1668,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1010.1 1291.2,997.0 1291.1,928.7 1668.0,928.4 1668.0,-0.0 -0.0,0.0 -0.0,1010.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195006:04023_06_1950-0724__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,927.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6658705,42.9104385]}},{"type":"Feature","properties":{"resourceCoords":[552.0,927.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6659127,42.9113354]}}]}}]}