{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04023_023.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Grand Rapids, Michigan | 1953 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"90"},{"label":"placed","value":"69"},{"label":"unplaced","value":"21"},{"label":"fit sources","value":"georef-snap 50, georef 19"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"17 sheet(s) cut into 41 panels"},{"label":"unplaced pages","value":"p721__2 (tier 1, 42.92664,-85.63346 +/-100m); p721__3 (tier 1, 42.91224,-85.64761 +/-113m); p721__4 (tier 1, 42.92578,-85.63249 +/-166m); p722__1 (tier 1, 42.91306,-85.62677 +/-266m); p723__1 (tier 1, 42.90477,-85.61454 +/-208m); p723__2 (tier 1, 42.90476,-85.61712 +/-199m); p725__2 (tier 2, 42.90881,-85.66057 +/-540m); p819__1 (tier 1, 42.91892,-85.74598 +/-445m); p819__2 (tier 1, 42.93706,-85.70709 +/-225m); p826__1 (tier 1, 42.92594,-85.73254 +/-100m); p826__3 (tier 1, 42.92578,-85.73242 +/-100m); p833 (tier 3, 42.94209,-85.70297 +/-665m); p834__2 (tier 2, 42.92177,-85.71303 +/-432m); p834__3 (tier 2, 42.92177,-85.71303 +/-432m); p837__2 (tier 1, 42.90492,-85.76789 +/-100m); p840__2 (tier 1, 42.92165,-85.73031 +/-100m); p841__2 (tier 2, 42.91920,-85.72173 +/-163m); p844__1 (tier 1, 42.94048,-85.70034 +/-271m); p844__2 (tier 1, 42.93818,-85.70121 +/-147m); p844__3 (tier 1, 42.93793,-85.70094 +/-100m); p845__1 (tier 1, 42.91107,-85.76633 +/-195m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0701/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 | 1953 | sanborn04023_023 p701","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0701/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0701","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"585.5,89.8 1232.5,66.4 1308.6,116.6 1308.8,1223.2 1311.4,1854.6 1059.2,1853.5 1059.1,1844.6 812.0,1834.6 812.1,1844.3 558.3,1837.2 558.3,1846.5 305.5,1828.6 305.2,1682.0 301.6,1518.8 305.1,1335.5 302.1,895.8 306.1,607.9 305.9,67.9 585.5,89.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0701/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66529255139167,42.92555892151908]}},{"type":"Feature","properties":{"resourceCoords":[1318.0,1154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66402576202401,42.92558852447775]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0702/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 | 1953 | sanborn04023_023 p702","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0702/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0702","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"808.8,1560.0 295.1,1543.5 298.1,1171.3 296.0,806.2 299.1,586.3 298.7,252.9 301.6,134.7 301.6,99.2 555.5,118.2 555.6,109.0 810.5,117.2 810.5,107.5 1058.7,118.6 1058.8,127.5 1312.0,129.8 1312.0,527.9 1313.8,1583.8 808.8,1560.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0702/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[810.0,546.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66520196360796,42.9235069719586]}},{"type":"Feature","properties":{"resourceCoords":[810.0,1544.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66511145439655,42.921682425752394]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0703/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 | 1953 | sanborn04023_023 p703","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0703/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0703","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1006.3,1891.2 1008.9,1822.9 144.2,1774.7 147.2,1207.3 157.3,97.8 174.7,109.5 442.4,46.9 1245.0,57.9 1577.8,204.2 1556.7,358.1 1505.0,363.3 1493.1,650.1 1571.1,1080.6 1502.7,1490.3 1567.3,1529.8 1588.8,1722.2 1540.5,1882.1 1006.3,1891.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0703/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[155.0,1178.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66402663109196,42.92551523130739]}},{"type":"Feature","properties":{"resourceCoords":[607.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66300255803397,42.92743543938899]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0704/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 | 1953 | sanborn04023_023 p704","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0704/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0704","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.2,519.8 203.8,61.6 1059.8,100.4 1058.0,168.0 1586.3,153.6 1577.1,185.3 1249.9,574.6 1217.0,573.1 1131.5,593.4 1148.3,674.4 1182.8,774.9 1222.0,914.8 1241.0,1011.0 1268.6,1197.7 1283.3,1876.0 1202.1,1872.7 1203.3,1861.2 758.9,1827.3 757.5,1592.8 213.7,1562.6 206.2,519.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0704/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[763.0,1844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66243900420709,42.921153363495726]}},{"type":"Feature","properties":{"resourceCoords":[194.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66397711962382,42.92347611936065]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0705/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 | 1953 | sanborn04023_023 p705","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0705/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0705","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"613.4,88.3 1116.1,110.3 1664.0,141.8 1664.0,378.0 1629.4,375.3 1627.0,896.5 1522.5,1172.1 1513.3,1898.7 1028.0,1919.5 635.0,1811.1 157.0,1832.2 92.5,1786.0 66.6,564.1 100.5,564.7 102.0,73.7 613.4,88.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0705/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[572.0,1432.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6651060483805,42.91918184203325]}},{"type":"Feature","properties":{"resourceCoords":[614.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66511040411474,42.92163158679932]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0706/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 | 1953 | sanborn04023_023 p706","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0706/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0706","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1574.4,2017.0 1584.0,2017.0 1598.2,2017.0 1595.3,1799.8 1593.6,1021.5 1589.4,462.2 1589.6,300.1 1582.1,101.1 747.4,66.5 471.5,8.7 461.6,1.0 459.4,1.0 145.3,360.5 112.1,358.4 25.7,377.1 41.1,459.0 73.8,560.7 110.6,702.2 127.8,799.5 152.0,987.7 153.5,1670.5 71.9,1665.5 49.5,1836.3 221.5,1918.3 1559.0,1875.4 1574.4,2017.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0706/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1576.0,966.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6576381028982,42.92255048791043]}},{"type":"Feature","properties":{"resourceCoords":[149.0,1710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6611273334855,42.92105072281597]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0707/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 | 1953 | sanborn04023_023 p707","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0707/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0707","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1628.8,174.7 1620.7,1903.5 1132.0,1866.4 633.6,1857.9 633.6,1859.7 139.1,1840.6 139.3,1781.0 128.8,1721.3 102.0,910.8 184.3,500.7 162.0,107.0 424.5,47.7 1327.6,54.0 1585.1,83.3 1629.0,136.6 1628.8,174.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0707/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[642.0,108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65670338371562,42.927318245496004]}},{"type":"Feature","properties":{"resourceCoords":[160.0,108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65790249623659,42.92726887057312]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0708/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 | 1953 | sanborn04023_023 p708","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0708/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0708","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.4,978.0 69.3,411.5 69.0,247.3 68.0,63.0 564.5,77.5 564.5,75.8 1064.9,79.8 1555.7,112.5 1556.4,273.1 1557.1,382.9 1570.4,1835.6 1070.4,1806.3 1070.0,1754.5 80.1,1798.7 79.6,1766.2 75.4,978.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0708/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1067.0,302.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65520712585715,42.92376197877243]}},{"type":"Feature","properties":{"resourceCoords":[89.0,1715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65746728093875,42.92111289182165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0709/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 | 1953 | sanborn04023_023 p709","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0709/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0709","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1459.9,1100.9 1636.0,1099.4 1592.0,1821.3 54.7,1818.3 55.5,1803.5 73.0,1775.3 117.5,228.4 198.2,115.9 863.6,118.5 1524.8,124.0 1462.2,1065.0 1459.9,1100.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0709/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[597.0,1105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64798125947067,42.926411680895065]}},{"type":"Feature","properties":{"resourceCoords":[1594.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64962787546168,42.92452644543453]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0710/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 | 1953 | sanborn04023_023 p710","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0710/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0710","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.9,1836.4 30.1,1836.5 77.1,1797.1 65.5,166.8 127.6,66.5 126.9,81.2 1657.0,82.8 1644.9,282.9 1621.7,671.5 1579.3,1374.2 1593.2,1374.2 1551.9,1829.6 67.9,1836.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0710/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1606.0,1336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65280215914404,42.92451484821217]}},{"type":"Feature","properties":{"resourceCoords":[108.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65417319625575,42.927226370593196]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0711/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 | 1953 | sanborn04023_023 p711","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0711/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0711","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.9,1833.9 188.0,1833.2 98.4,1577.8 106.2,1578.2 132.6,1306.7 119.5,1305.8 93.5,1066.0 87.2,1065.6 84.6,814.5 83.2,568.4 80.6,331.0 79.2,89.8 23.3,86.4 23.5,45.1 137.2,86.7 252.3,69.4 365.6,92.7 603.5,47.4 1071.8,48.8 1374.4,131.6 1543.9,135.1 1579.5,176.6 1551.7,175.1 1554.7,304.5 1560.6,576.2 1597.6,578.3 1608.5,1048.7 1584.3,1099.3 1578.9,1401.5 1625.7,1429.2 1583.7,1549.2 1585.7,1851.7 1549.3,1927.5 236.9,1868.4 201.9,1833.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0711/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1335.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63476797767645,42.9256198367998]}},{"type":"Feature","properties":{"resourceCoords":[1571.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63358901047219,42.92565632168921]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0712/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 | 1953 | sanborn04023_023 p712","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0712/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0712","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1578.8,864.5 1490.7,862.0 1488.0,901.3 1425.1,1846.2 762.0,1840.6 94.8,1838.0 101.0,1829.3 83.9,181.4 166.7,182.3 174.3,70.2 657.9,70.1 1134.0,67.6 1627.4,67.5 1578.8,864.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0712/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[592.0,874.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64309823418127,42.926404942757074]}},{"type":"Feature","properties":{"resourceCoords":[592.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64548434423054,42.92632127452374]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0713/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 | 1953 | sanborn04023_023 p713","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0713/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0713","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"718.6,1844.3 718.6,1854.9 265.6,1819.4 258.1,621.3 257.7,512.8 257.1,123.6 712.3,166.2 712.3,152.4 1414.6,196.8 1562.0,206.1 1503.9,649.6 1506.3,1137.5 1486.7,1136.3 1479.5,1618.9 1490.0,1619.5 1442.0,1818.4 718.6,1844.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0713/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.0,1597.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6526555818102,42.92190775053919]}},{"type":"Feature","properties":{"resourceCoords":[242.0,610.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6540242393176,42.9236762817314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0714/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 | 1953 | sanborn04023_023 p714","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0714/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0714","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.2,1682.5 117.0,1681.7 164.4,1486.3 154.1,1485.7 161.8,1011.6 181.0,1012.8 179.2,533.5 236.9,97.8 473.6,113.0 670.1,125.7 1375.6,171.1 1375.8,977.7 1373.0,1566.6 1371.3,1781.9 222.6,1761.0 90.2,1682.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0714/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1385.0,989.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64771199130988,42.92298273397005]}},{"type":"Feature","properties":{"resourceCoords":[1385.0,412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64778749642856,42.92406218550718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0715/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 | 1953 | sanborn04023_023 p715","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0715/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0715","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.9,1085.5 154.0,269.2 151.6,95.1 187.2,97.2 1568.4,182.3 1584.7,589.8 1577.8,589.3 1572.4,972.9 1565.0,972.5 1576.0,1344.4 1579.8,1344.6 1575.4,1776.4 781.6,1732.2 241.5,1698.7 163.0,1681.3 160.9,1085.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0715/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[170.0,1086.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.64771399915813,42.923002653190146]}},{"type":"Feature","properties":{"resourceCoords":[170.0,142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.647816420853,42.924748648775676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0716/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 | 1953 | sanborn04023_023 p716","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0716/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0716","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"665.1,1815.6 584.9,1811.2 102.8,1787.2 104.8,1345.5 100.9,1345.3 87.4,965.0 95.0,965.4 98.3,573.0 105.3,573.4 86.3,156.8 579.4,184.3 619.1,186.7 617.5,275.6 1422.0,316.0 1429.8,823.9 1442.6,824.5 1497.7,1309.5 1524.0,1311.1 1473.5,1860.7 665.1,1815.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0716/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[361.0,1358.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.643491,42.922631]}},{"type":"Feature","properties":{"resourceCoords":[1422.0,316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.640966,42.924587]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0717/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 | 1953 | sanborn04023_023 p717","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0717/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0717","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1578.1,1927.8 559.4,1961.5 138.9,1871.8 136.9,1672.8 144.8,691.9 100.9,324.0 100.8,323.0 124.8,322.8 120.2,136.7 1102.4,85.3 1103.2,136.7 1599.7,161.9 1607.1,602.7 1610.5,1546.8 1543.4,1543.0 1611.0,1832.1 1578.1,1927.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0717/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[594.0,1019.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65620892404593,42.91937978173781]}},{"type":"Feature","properties":{"resourceCoords":[1119.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65498807903217,42.921113836084544]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0718/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 | 1953 | sanborn04023_023 p718","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0718/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0718","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.3,1663.1 241.7,1668.1 254.7,733.8 255.0,61.9 705.4,100.3 705.4,89.8 1398.0,69.7 1531.6,149.8 1549.0,150.2 1521.7,376.4 1477.6,860.1 1487.8,860.9 1500.3,1320.0 1485.2,1319.0 1513.6,1759.9 1547.5,1762.6 1610.5,1805.3 1598.6,1904.7 1523.7,1936.9 255.1,1901.4 237.3,1950.4 175.3,1663.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0718/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[746.0,822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65246609225802,42.92010295467509]}},{"type":"Feature","properties":{"resourceCoords":[250.0,1675.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65359515653681,42.91847510870874]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0719/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 | 1953 | sanborn04023_023 p719","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0719/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0719","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"268.2,1828.0 234.3,1825.6 202.7,1385.8 217.8,1386.8 201.9,928.7 191.7,928.0 232.0,445.0 257.6,219.1 1400.7,237.6 1399.2,512.4 1403.5,1013.7 1227.5,2017.0 1197.5,2017.0 1175.5,2017.0 1185.6,1851.8 333.3,1853.5 331.4,1870.2 268.2,1828.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0719/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[427.0,968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65001493117471,42.920056681755526]}},{"type":"Feature","properties":{"resourceCoords":[1405.0,65.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6476538768968,42.921818159732]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0720/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 | 1953 | sanborn04023_023 p720","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0720/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0720","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.0,111.1 139.2,117.4 413.1,117.2 1054.4,112.4 1094.2,112.3 1487.0,111.7 1592.4,361.2 1606.4,361.1 1643.5,393.4 1634.5,393.6 1643.0,1739.8 1613.0,1899.0 569.5,1923.6 167.2,1913.2 96.2,1870.4 58.4,1638.8 54.5,1128.9 80.8,1127.1 134.6,613.5 114.8,360.2 99.0,111.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0720/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[681.0,1561.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.644906,42.916556]}},{"type":"Feature","properties":{"resourceCoords":[1548.0,1347.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.640555,42.917275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Grand Rapids, Michigan | 1953 | sanborn04023_023 p721 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2772.8"},{"label":"split_canvas_h","value":"3896.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"692.1,548.2 682.5,54.2 620.8,205.2 514.5,100.9 152.5,62.9 64.0,409.2 119.0,534.0 110.8,867.9 544.1,951.2 662.9,845.2 614.1,764.1 665.5,743.6 692.1,548.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64839580178382,42.91337830557858]}},{"type":"Feature","properties":{"resourceCoords":[693.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64663630957632,42.913410253063354]}},{"type":"Feature","properties":{"resourceCoords":[693.2,974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64657494356496,42.911600798976224]}},{"type":"Feature","properties":{"resourceCoords":[0.0,974.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.64833443577245,42.91156885149145]}},{"type":"Feature","properties":{"resourceCoords":[509.1,325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.647083,42.912798]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__5/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 | 1953 | sanborn04023_023 p721 [5]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.45"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4714.4"},{"label":"split_canvas_y","value":"3228.0"},{"label":"split_canvas_w","value":"1945.6"},{"label":"split_canvas_h","value":"4844.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1635.4,1803.4 1634.8,1764.0 1597.4,1767.5 1616.4,1354.8 1543.5,1015.4 1551.6,893.5 1531.2,866.6 1362.1,848.1 1229.3,867.8 1225.8,1798.3 1210.1,1814.0 1210.5,1843.7 1635.4,1803.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0721__5/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1417.3,1826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.633718232684,42.9264397712254]}},{"type":"Feature","properties":{"resourceCoords":[1610.1,1334.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.63143655121499,42.92572588716898]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0722__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 | 1953 | sanborn04023_023 p722 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2948.0"},{"label":"split_canvas_y","value":"2991.6"},{"label":"split_canvas_w","value":"3712.0"},{"label":"split_canvas_h","value":"2044.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0722__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0722","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1502.8,874.3 860.4,867.9 829.6,1049.2 901.0,1137.1 1026.7,1167.6 1042.1,1202.8 1008.4,1225.3 1556.8,1252.6 1575.7,802.4 1502.8,874.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0722__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[737.0,747.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63418959557555,42.914266093708605]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,747.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63416611583921,42.91253209817791]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,1258.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63546182263173,42.912522553902825]}},{"type":"Feature","properties":{"resourceCoords":[737.0,1258.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.63548530236807,42.91425654943352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__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 | 1953 | sanborn04023_023 p724 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.71"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4000.8"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"4071.2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.7,1863.8 226.4,1828.2 551.1,1818.2 995.5,1837.2 1014.5,1878.1 1017.9,1837.0 1309.0,1827.3 1384.0,1795.0 1386.9,1583.2 1392.2,1193.7 1196.4,1008.6 1196.5,1000.2 799.1,1000.2 798.4,1022.0 463.0,1037.2 154.5,1051.0 143.3,1051.5 147.1,1863.8 151.7,1863.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[988.0,1829.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6656163,42.905052]}},{"type":"Feature","properties":{"resourceCoords":[463.0,1037.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6616891,42.9069272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__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 | 1953 | sanborn04023_023 p724 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"4000.8"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"834.0,117.8 816.5,124.3 804.9,146.3 128.8,435.9 131.7,389.7 102.9,418.9 115.2,472.4 66.5,769.2 104.8,918.4 317.8,945.2 584.2,922.6 859.3,963.0 1402.5,940.3 1439.7,924.8 1435.1,924.6 1469.4,122.9 1458.3,122.8 1130.2,119.9 834.0,117.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0724__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[777.0,928.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66590432423222,42.91049782531741]}},{"type":"Feature","properties":{"resourceCoords":[1433.0,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66180533941849,42.908214347380834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__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 | 1953 | sanborn04023_023 p725 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.7,1809.8 1325.0,1747.9 1579.1,1783.0 1579.2,1787.9 1579.6,1797.2 1610.1,1781.0 1607.5,1780.2 1624.6,1239.3 1594.0,1143.5 1607.6,1037.8 1532.2,96.0 1211.2,66.1 998.4,93.8 325.6,95.4 256.9,112.3 286.4,140.5 240.4,138.3 537.6,804.5 559.6,815.7 566.3,833.0 566.6,869.4 568.6,1126.8 570.6,1452.1 570.8,1474.1 574.5,1776.5 1325.7,1809.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,178.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66039000996355,42.912850744921094]}},{"type":"Feature","properties":{"resourceCoords":[571.0,1135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66178674516951,42.90929326203334]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__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 | 1953 | sanborn04023_023 p725 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3686.4"},{"label":"split_canvas_w","value":"1993.6"},{"label":"split_canvas_h","value":"1988.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"459.9,1195.0 456.8,1118.0 202.5,1082.4 202.9,1143.8 206.2,1414.5 282.4,1413.4 459.2,1225.9 459.9,1195.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0725__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,921.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65895389291924,42.90767843586817]}},{"type":"Feature","properties":{"resourceCoords":[498.4,921.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65644729853254,42.907729918231226]}},{"type":"Feature","properties":{"resourceCoords":[498.4,1418.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65637750428101,42.9058809779615]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1418.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65888409866771,42.90582949559845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__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 | 1953 | sanborn04023_023 p726 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"784.6,1735.8 1186.0,1754.9 1186.0,1754.2 1186.0,1735.2 1083.9,1733.8 1186.0,1670.5 1186.0,1665.6 1186.0,1429.5 1378.4,1429.5 1574.8,1429.5 1582.9,1424.5 1587.7,1226.5 1598.6,1187.7 1510.7,1183.5 1522.5,168.2 875.5,177.7 873.7,211.3 758.1,100.8 758.6,255.3 204.6,255.0 114.1,1777.5 780.9,1779.1 784.6,1735.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[167.0,1781.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66169255435848,42.90683072156945]}},{"type":"Feature","properties":{"resourceCoords":[833.0,1781.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66162668078324,42.90562015176112]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__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 | 1953 | sanborn04023_023 p726 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.71"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4744.0"},{"label":"split_canvas_y","value":"5718.0"},{"label":"split_canvas_w","value":"1916.0"},{"label":"split_canvas_h","value":"2354.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1186.0,1578.8 1186.0,1701.4 1194.0,1701.2 1194.2,1731.4 1186.0,1731.6 1186.0,1740.8 1186.0,1758.3 1371.0,1941.5 1370.9,1945.0 1656.7,1775.9 1658.0,1722.6 1664.0,1698.9 1645.0,1473.4 1190.9,1463.0 1186.0,1482.0 1186.0,1578.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0726__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1186.0,1429.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65990895056709,42.90429167226594]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,1429.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.65987062394608,42.902511615280325]}},{"type":"Feature","properties":{"resourceCoords":[1665.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66286205631955,42.90247713150464]}},{"type":"Feature","properties":{"resourceCoords":[1186.0,2018.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-85.66290038294056,42.904257188490256]}},{"type":"Feature","properties":{"resourceCoords":[1379.0,1727.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.661407,42.903557]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0727/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 | 1953 | sanborn04023_023 p727","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.67"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0727/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0727","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"862.5,1775.3 861.3,1809.2 355.0,1342.7 161.9,1348.1 128.8,1286.0 182.6,1128.3 137.2,806.8 173.4,144.0 672.5,169.4 794.2,52.6 988.4,34.4 1591.8,61.9 1619.6,159.4 1555.1,389.2 1502.8,395.6 1512.7,1753.5 862.5,1775.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0727/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[877.0,1349.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.65659,42.905649]}},{"type":"Feature","properties":{"resourceCoords":[143.0,1349.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.656628,42.906977]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__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 | 1953 | sanborn04023_023 p728 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3888.4"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"535.4,1842.3 936.7,1863.8 935.4,1736.7 914.6,1735.7 945.3,1185.0 924.0,759.6 928.9,751.0 874.1,749.1 704.0,453.6 319.4,434.4 108.2,423.8 116.8,445.9 93.3,747.0 41.1,749.2 38.0,983.9 39.1,1077.1 87.4,1082.2 99.6,1175.7 117.2,1731.4 92.8,1742.8 93.1,1805.8 440.9,1837.4 535.4,1842.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[443.1,1829.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6636093553164,42.898567780594234]}},{"type":"Feature","properties":{"resourceCoords":[930.1,456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66139722959588,42.90358898943493]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__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 | 1953 | sanborn04023_023 p728 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.81"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3818.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2841.6"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1025.1,1180.7 1000.8,1182.5 1000.9,1208.0 1006.8,1234.4 1016.5,1478.3 1011.8,1478.1 1016.4,1724.5 1023.9,1724.8 985.1,1792.2 1004.9,1793.4 1010.3,1859.0 1310.8,1900.6 1616.4,1891.4 1613.5,381.6 1551.8,379.8 1535.0,332.0 1550.7,45.1 1476.9,32.4 1478.0,156.5 1086.6,135.3 1010.1,131.3 1025.1,1180.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0728__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1483.2,1251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6609762,42.8944351]}},{"type":"Feature","properties":{"resourceCoords":[1483.2,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6609396,42.8935229]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__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 | 1953 | sanborn04023_023 p729 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.04"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3402.8"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"718.5,2017.0 761.8,2017.0 828.6,155.9 800.7,153.0 202.1,67.7 154.6,1157.0 143.0,1459.0 140.5,1571.3 134.3,1694.1 131.2,1754.6 730.3,1750.9 718.5,2017.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[147.9,1315.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6652131,42.8960069]}},{"type":"Feature","properties":{"resourceCoords":[800.7,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.663619,42.898537]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__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 | 1953 | sanborn04023_023 p729 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.66"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3334.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3325.2"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1541.6,1816.6 1616.9,1680.6 1602.0,1680.2 1584.8,1187.7 1594.2,1188.0 1567.1,700.6 1554.5,648.1 1546.8,295.6 873.6,344.5 874.8,418.4 885.7,1164.6 887.8,1394.1 896.0,1662.3 895.6,1837.2 927.4,1809.7 1363.4,1808.2 1541.6,1816.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_07_1953-0729__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1539.1,683.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66346340284039,42.89447660129554]}},{"type":"Feature","properties":{"resourceCoords":[891.6,1179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66508723577053,42.893540583017]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0809/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 | 1953 | sanborn04023_023 p809","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0809/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0809","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1414.2,1833.5 1561.8,1843.0 1603.3,1705.0 1577.1,1491.9 1588.0,1492.4 1568.2,1140.8 1572.0,1139.0 1571.4,1080.7 1587.0,1072.5 1574.0,186.1 1187.1,171.8 987.1,165.3 759.7,152.8 759.4,118.7 743.2,72.2 743.1,86.8 533.7,86.6 167.8,147.0 268.4,209.4 244.9,454.7 118.2,608.1 130.8,770.3 174.4,782.9 169.7,915.0 116.3,968.1 94.2,1073.9 99.1,1346.0 133.0,1424.3 116.3,1684.6 1.0,1678.6 1.0,1715.4 595.9,1852.4 601.7,1846.9 605.2,1843.7 622.0,1827.9 1005.5,1789.9 1005.2,1812.7 1414.3,1829.1 1414.2,1833.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0809/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1002.0,853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70592623820758,42.93038689921469]}},{"type":"Feature","properties":{"resourceCoords":[1200.0,179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70505451805091,42.93288761427942]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0810/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 | 1953 | sanborn04023_023 p810","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"25"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0810/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0810","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"122.5,1616.8 133.2,1617.4 117.6,1271.9 121.3,1270.1 121.3,1212.9 136.8,1205.0 133.4,334.2 361.3,347.3 517.6,210.0 517.4,112.8 709.8,110.6 709.8,111.7 902.8,118.2 902.9,116.4 1096.9,115.8 1202.2,110.3 1202.3,125.7 1288.3,158.5 1480.5,152.3 1480.6,133.5 1503.7,134.5 1527.2,136.1 1510.2,511.9 1506.0,548.1 1504.9,619.8 1501.6,620.5 1488.7,648.0 1486.8,879.2 1487.2,1079.7 1487.2,1099.3 1504.4,1100.3 1495.2,1343.0 1486.9,1706.6 1439.2,1703.4 1546.1,1901.7 1535.5,1916.5 1201.5,1955.0 776.5,1935.2 547.3,1895.6 538.6,1848.2 402.9,1816.6 150.4,1812.0 146.0,1826.3 122.5,1616.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0810/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[961.0,1671.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6986358,42.9280609]}},{"type":"Feature","properties":{"resourceCoords":[518.0,357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70121,42.932893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0811/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 | 1953 | sanborn04023_023 p811","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0811/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0811","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"335.4,1077.1 336.6,932.0 344.6,858.5 373.6,96.5 1179.2,142.9 1236.7,146.2 1234.8,471.4 1244.6,1604.3 1246.6,1865.4 304.4,1800.5 302.7,1603.4 302.9,1134.7 328.8,1078.7 335.4,1077.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0811/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1240.0,1096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.69383113684702,42.93211494450066]}},{"type":"Feature","properties":{"resourceCoords":[1240.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.69378258339329,42.931215073286644]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0812/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 | 1953 | sanborn04023_023 p812","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0812/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0812","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.6,1533.8 229.8,1540.6 249.1,814.2 269.6,329.3 235.2,327.1 235.3,287.9 235.7,81.7 1163.9,156.0 1163.2,343.9 1163.2,386.9 1203.9,389.6 1558.7,413.4 1486.3,1622.9 1470.2,1621.8 1121.8,1919.3 1123.5,1871.0 410.6,1842.1 346.6,1930.9 134.6,1533.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0812/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[770.0,1570.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.69456062459727,42.92801607459143]}},{"type":"Feature","properties":{"resourceCoords":[1162.0,349.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.69371777702656,42.930335744298674]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0813/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 | 1953 | sanborn04023_023 p813","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0813/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0813","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1549.0,344.5 1545.4,216.3 1560.3,216.7 1610.7,556.8 1593.9,1184.3 1621.8,1613.5 1596.4,1945.3 1145.3,1965.5 795.2,1924.8 399.9,1927.7 302.4,1825.9 121.7,1811.0 82.3,1751.1 73.2,1654.8 77.3,948.3 251.3,790.6 259.6,790.9 278.3,170.3 445.5,176.5 517.4,178.2 667.9,185.6 878.2,192.2 1033.5,200.1 1074.6,207.8 1086.4,220.6 1088.2,250.5 1169.9,232.4 1168.5,227.2 1549.0,344.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0813/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1193.0,1332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.68801295698647,42.92608054327494]}},{"type":"Feature","properties":{"resourceCoords":[948.0,811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.68928937116898,42.9279644053569]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0814/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 | 1953 | sanborn04023_023 p814","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0814/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0814","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"818.0,1672.1 759.6,1669.9 613.2,1661.9 543.2,1659.9 203.3,1645.3 182.9,1644.5 182.5,1623.0 177.9,1400.9 165.9,843.9 164.8,684.0 159.0,467.5 155.3,247.1 207.3,207.1 207.2,172.0 603.9,141.4 1170.2,210.4 1342.1,100.0 1468.5,81.7 1543.5,98.1 1542.5,137.7 1552.7,142.8 1412.0,194.2 1358.3,214.4 1308.4,229.8 1260.7,241.0 1172.2,255.2 1056.6,259.6 1044.6,826.5 1026.7,893.3 1248.0,1718.3 1168.4,1735.5 1166.8,1706.4 1155.4,1693.8 1115.4,1686.0 964.3,1677.5 818.0,1672.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0814/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[975.0,1664.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.68964928208838,42.930270745664096]}},{"type":"Feature","properties":{"resourceCoords":[146.0,256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.69408862598176,42.935469380557336]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0815/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 | 1953 | sanborn04023_023 p815","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0815/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0815","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1442.6,1863.9 1442.4,1779.4 322.4,1786.8 264.4,1563.1 301.9,1428.0 335.8,279.1 570.4,272.1 624.6,263.9 749.8,244.9 846.8,222.9 871.8,215.5 948.2,192.7 956.1,189.8 1057.4,152.5 1343.4,50.9 1444.6,102.9 1523.1,980.6 1442.7,1400.8 1519.3,1709.7 1522.5,1867.4 1442.6,1863.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0815/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1441.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.686522,42.93336]}},{"type":"Feature","properties":{"resourceCoords":[1441.0,520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.686609,42.935173]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0816/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 | 1953 | sanborn04023_023 p816","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0816/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0816","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1450.0,1644.0 1453.9,1895.1 712.0,1656.4 338.6,226.7 1449.7,217.2 1450.0,301.0 1529.2,304.3 1545.9,1067.1 1465.1,1541.8 1479.1,1645.2 1450.0,1644.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0816/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1450.0,301.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6864856,42.9326869]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,1644.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.686372,42.930182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0817/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 | 1953 | sanborn04023_023 p817","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0817/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0817","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1572.7,1817.8 1564.5,976.3 1516.6,974.4 1518.4,736.3 1514.0,44.0 910.8,19.0 420.8,1.0 354.1,1.0 352.4,227.1 348.5,926.9 170.6,918.0 170.8,970.2 176.7,1829.1 568.8,1823.0 568.9,1825.2 962.5,1836.5 962.5,1832.9 1358.0,1830.0 1572.7,1817.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0817/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[563.0,937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7003985,42.9354705]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.698112,42.937181]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0818/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 | 1953 | sanborn04023_023 p818","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0818/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0818","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.7,921.0 21.2,919.0 23.9,687.4 22.4,14.1 637.9,35.2 1136.2,41.6 1343.9,51.3 1519.5,123.8 1558.1,834.4 1664.0,828.3 1664.0,898.0 1559.0,975.5 1557.7,1414.0 1560.7,1844.7 1504.5,1841.0 670.0,1787.2 624.4,1785.2 624.2,1822.5 243.0,1835.5 72.5,1770.0 67.7,921.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0818/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[627.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6964447,42.9354816]}},{"type":"Feature","properties":{"resourceCoords":[1319.0,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.694771,42.937238]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__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 | 1953 | sanborn04023_023 p820 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.0,1671.1 221.6,1717.8 221.7,1751.8 448.7,1766.7 648.2,1775.2 1034.5,1793.3 1266.2,1806.5 1425.1,1666.7 1423.5,1139.5 1423.5,1113.5 1512.2,1118.3 1515.5,769.2 1516.8,654.6 1521.0,409.6 1508.5,416.8 1429.0,391.1 1376.3,418.1 410.7,344.2 425.0,671.5 330.9,960.9 310.9,996.7 79.0,1088.8 126.2,1340.7 209.1,1531.7 206.0,1671.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[649.0,1771.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70511790946337,42.93292777471579]}},{"type":"Feature","properties":{"resourceCoords":[1032.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70345776719286,42.93715578583931]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__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 | 1953 | sanborn04023_023 p820 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1982.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4678.0"},{"label":"split_canvas_h","value":"1582.4"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"529.8,307.5 550.0,309.3 566.5,309.6 814.6,323.9 1123.3,342.4 1447.2,358.2 1623.4,360.1 1624.0,39.7 567.9,39.6 537.9,56.2 529.8,307.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0820__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1125.2,319.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.6981091845036,42.937262898691564]}},{"type":"Feature","properties":{"resourceCoords":[544.5,90.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.70101367130252,42.93795503405866]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0821/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 | 1953 | sanborn04023_023 p821","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0821/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0821","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1354.5,175.9 1395.3,1422.2 1408.3,1767.6 1414.2,1875.6 327.2,1874.8 365.4,179.6 423.8,193.8 1265.5,93.3 1350.6,51.0 1354.5,175.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0821/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1382.0,1410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66526321247065,42.89635961435824]}},{"type":"Feature","properties":{"resourceCoords":[1382.0,171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66527330714085,42.89862444224316]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0822/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 | 1953 | sanborn04023_023 p822","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0822/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0822","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"247.9,1350.0 259.2,1350.2 293.7,91.2 1362.0,97.1 1363.0,117.2 1365.8,255.2 1368.8,397.0 1383.5,1141.1 1386.8,1369.9 1396.4,1637.4 1397.0,1811.7 1362.8,1841.6 1072.4,1868.3 499.9,1812.9 453.4,1824.9 294.3,1820.5 247.9,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0822/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1374.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66513738165239,42.894502754086304]}},{"type":"Feature","properties":{"resourceCoords":[541.0,1363.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66723748547852,42.8931416510354]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0823/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 | 1953 | sanborn04023_023 p823","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.37"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0823/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0823","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1526.7,901.4 1505.2,902.1 1095.2,1415.1 1095.7,1429.3 1098.0,1486.2 1098.6,1503.0 1100.7,1574.8 1108.2,1776.3 1109.4,1808.0 1196.0,1807.1 1408.7,1881.8 1362.9,1886.4 930.8,1892.0 134.2,1839.9 84.3,1543.1 116.9,169.5 138.0,136.4 333.5,106.8 841.5,81.5 1205.0,99.2 1371.5,70.2 1525.0,103.6 1526.7,901.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0823/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1091.0,360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67003827451848,42.89768467343936]}},{"type":"Feature","properties":{"resourceCoords":[1091.0,90.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67000916162596,42.89868748954747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0824/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 | 1953 | sanborn04023_023 p824","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0824/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0824","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"425.6,1731.2 593.2,1734.3 1000.9,1891.0 1224.8,1875.0 1222.5,1745.8 1283.5,1747.5 1238.6,1291.4 1249.5,1291.5 1284.9,1.0 1242.6,1.0 420.4,969.8 420.7,997.3 420.9,1013.5 421.8,1107.6 421.8,1108.5 422.1,1140.0 422.1,1279.2 425.6,1731.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0824/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[921.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66881374278064,42.89318781283974]}},{"type":"Feature","properties":{"resourceCoords":[426.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67010985520525,42.89318012103531]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0825/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 | 1953 | sanborn04023_023 p825","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.24"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0825/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0825","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1590.0,250.1 1602.7,254.9 1606.8,277.9 1616.0,911.0 1616.0,1742.4 1549.8,1868.5 1166.3,1853.7 592.4,1950.9 166.5,1884.5 45.9,665.7 136.6,110.0 507.0,52.1 1499.0,50.1 1583.4,97.8 1590.0,250.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0825/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1616.0,911.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.679111,42.926211]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.679066,42.924551]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0826__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 | 1953 | sanborn04023_023 p826 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1298.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5361.2"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0826__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0826","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"612.8,1795.4 614.2,1792.5 869.7,1854.5 1443.7,1802.8 1454.4,1806.2 1418.5,940.4 1386.0,180.9 1378.6,143.4 626.6,67.2 533.1,148.6 524.2,143.9 536.0,296.8 549.0,301.1 553.9,324.1 579.9,864.2 584.5,960.0 612.8,1795.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0826__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[972.4,960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.678129,42.926201]}},{"type":"Feature","properties":{"resourceCoords":[584.6,960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.679111,42.926211]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0827/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 | 1953 | sanborn04023_023 p827","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0827/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0827","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"203.7,929.8 172.1,176.6 164.8,139.4 170.4,140.0 624.0,54.7 1086.3,77.5 1412.1,152.7 1534.3,115.0 1602.6,188.1 1632.1,899.3 1664.0,1524.5 1664.0,1816.8 1429.6,1815.0 1235.1,1813.5 951.8,1815.9 750.8,1812.5 671.4,1813.6 358.2,1826.6 238.6,1788.4 203.7,929.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0827/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1165.0,1816.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67457463149435,42.924546261233246]}},{"type":"Feature","properties":{"resourceCoords":[685.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67574373257315,42.927695730107516]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0828/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 | 1953 | sanborn04023_023 p828","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.45"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0828/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0828","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"765.0,65.0 1054.2,62.9 1469.5,66.5 1523.8,128.9 1562.8,1875.8 1485.7,1916.8 1316.3,1933.6 1072.4,1870.2 431.4,1892.5 194.4,1799.6 135.1,1770.8 43.4,1491.8 56.4,732.5 162.2,340.6 159.1,75.3 521.2,60.6 765.0,65.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0828/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1506.0,70.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67326672559021,42.92452631853574]}},{"type":"Feature","properties":{"resourceCoords":[537.0,70.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67568874235523,42.9245475010344]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0829/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 | 1953 | sanborn04023_023 p829","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0829/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0829","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"166.7,128.1 894.6,50.0 1664.0,71.6 1625.5,83.4 1647.0,600.6 1603.6,600.8 1575.5,1072.4 1581.8,1072.4 1568.7,1546.2 1552.1,1546.4 1580.5,1790.7 971.8,1793.4 977.5,1904.4 263.7,1850.1 262.6,1812.2 209.0,1751.4 231.3,1751.5 229.8,1459.1 194.8,834.0 161.8,122.8 166.7,128.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0829/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[201.0,820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67333548133917,42.92627386297499]}},{"type":"Feature","properties":{"resourceCoords":[936.0,1553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67149387478689,42.92487967384792]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0830/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 | 1953 | sanborn04023_023 p830","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0830/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0830","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.4,1768.8 166.6,1523.8 183.2,1523.6 197.6,1048.5 191.2,1048.5 220.6,575.6 264.1,575.5 243.9,56.8 282.5,45.0 1429.4,80.2 1454.8,612.2 1464.3,896.1 1487.8,1329.0 1493.0,1509.8 1504.1,1670.5 1508.9,1766.5 194.4,1768.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0830/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1477.0,1127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66657172783465,42.92557258576008]}},{"type":"Feature","properties":{"resourceCoords":[248.0,87.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66965780212003,42.927545584450904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0831/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 | 1953 | sanborn04023_023 p831","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0831/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0831","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"929.1,239.1 922.1,126.9 1542.3,117.9 1575.2,353.2 1583.7,353.1 1581.2,843.4 1576.1,843.5 1562.2,1267.2 1568.1,1267.0 1582.7,1606.5 1565.3,1606.9 1583.6,1831.3 904.0,1904.0 814.0,1818.9 616.3,1795.3 419.3,1800.8 272.1,1882.1 207.0,191.5 929.1,239.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0831/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[202.0,96.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67322861626211,42.924523979877826]}},{"type":"Feature","properties":{"resourceCoords":[968.0,1268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.67137910549394,42.92231840214619]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0832/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 | 1953 | sanborn04023_023 p832","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0832/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0832","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1479.2,1884.0 719.1,1888.1 215.3,1766.5 153.4,1772.2 138.4,1551.4 155.5,1551.3 145.6,1217.6 139.8,1217.6 159.1,801.5 164.1,801.5 173.0,319.8 164.7,319.9 135.5,88.2 1432.6,86.8 1436.6,169.2 1439.7,284.2 1456.6,607.9 1464.5,821.6 1484.7,1176.0 1500.2,1537.7 1521.5,2017.0 1488.4,2017.0 1479.2,1884.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0832/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1485.0,1536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66643614933346,42.92165267978287]}},{"type":"Feature","properties":{"resourceCoords":[1485.0,1215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.66642396176265,42.922256513524744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0834__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 | 1953 | sanborn04023_023 p834 [1]","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.93"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0834__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0834","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1586.0,1779.2 1615.8,671.5 1579.9,369.1 1531.0,275.9 1528.5,95.7 1405.2,33.6 1162.3,41.7 1138.5,145.5 1135.2,206.6 1132.9,247.8 310.8,281.2 190.9,279.9 159.7,274.9 123.6,260.1 79.2,230.5 26.5,367.7 47.0,368.2 35.0,676.7 94.4,928.3 97.1,1101.2 131.5,1190.3 284.8,1231.2 285.4,1232.5 288.0,1232.5 288.0,1237.4 319.7,1298.3 349.5,1420.4 343.7,1637.2 303.2,1639.8 287.6,1808.4 256.7,1807.3 256.9,1823.6 551.9,1857.2 576.8,1857.3 566.4,1833.3 1041.0,1846.7 1040.8,1850.2 1040.6,1854.4 1566.6,1862.7 1571.4,1779.1 1586.0,1779.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0834__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[294.0,1857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7184007,42.9238567]}},{"type":"Feature","properties":{"resourceCoords":[1094.0,926.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.713627,42.921013]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0835/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 | 1953 | sanborn04023_023 p835","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.72"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0835/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0835","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1620.4,181.3 1593.2,194.7 1645.1,962.0 1664.0,1186.4 1664.0,1636.5 1631.4,1637.4 1607.0,1914.5 165.8,1924.1 99.0,1845.2 141.8,1364.1 73.9,353.4 171.4,89.8 216.0,147.2 302.1,73.0 964.0,40.0 1639.5,94.0 1620.4,181.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0835/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[164.0,1422.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.769131,42.906578]}},{"type":"Feature","properties":{"resourceCoords":[677.0,1422.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.767833,42.906562]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0836/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 | 1953 | sanborn04023_023 p836","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0836/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0836","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1149.0 1.0,1875.3 524.2,1904.1 939.0,1817.2 1445.5,1858.4 1445.6,1860.8 1504.3,1865.4 1571.9,1201.5 1587.5,1202.0 1585.3,973.1 1588.8,585.2 1577.6,102.9 1577.7,88.5 960.9,123.1 961.5,93.7 473.0,274.2 474.6,194.4 78.5,318.9 66.0,359.4 40.1,443.4 12.3,454.4 1.0,1149.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0836/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[938.0,1823.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.76285030018146,42.90635124845852]}},{"type":"Feature","properties":{"resourceCoords":[51.0,1717.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.76514566911574,42.90643860141703]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0837__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 | 1953 | sanborn04023_023 p837 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.93"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0837__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0837","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1562.1,1265.5 1265.9,1352.4 1260.0,1336.5 1159.5,1362.4 1159.5,1066.8 1080.0,853.4 1076.5,580.7 1664.0,576.6 1664.0,411.2 1616.7,414.5 1614.7,143.1 1453.1,85.9 761.4,69.0 306.8,177.1 214.5,165.8 124.5,261.7 98.1,531.8 206.5,1991.8 610.2,1855.0 610.4,1934.5 1093.0,1744.0 1093.0,1773.3 1664.0,1728.7 1664.0,1503.1 1655.1,1506.9 1641.5,1273.8 1664.0,1264.6 1562.1,1265.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0837__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1093.0,1744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.763088,42.909606]}},{"type":"Feature","properties":{"resourceCoords":[131.0,582.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.765705,42.91172]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0838/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 | 1953 | sanborn04023_023 p838","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0838/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0838","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"82.5,1895.4 741.0,1899.5 1357.1,1910.2 1357.4,1901.8 1490.8,1915.6 1530.0,1913.8 1588.8,1793.8 1622.8,251.2 1599.9,155.0 1394.1,68.8 796.3,73.9 791.6,1.0 767.6,1.0 762.5,261.8 15.1,535.1 24.4,773.0 33.5,769.4 29.1,999.3 30.1,999.2 72.5,1011.4 85.1,1501.2 82.5,1895.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0838/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[749.0,1504.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7597143969412,42.908835255961804]}},{"type":"Feature","properties":{"resourceCoords":[1363.0,534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.75832082953961,42.91070443855278]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0839/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 | 1953 | sanborn04023_023 p839","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0839/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0839","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.0,1056.1 167.8,373.6 183.8,373.6 174.5,139.2 839.0,125.0 1460.9,118.6 1460.9,110.2 1569.1,122.4 1607.9,1857.0 1340.3,1942.7 557.5,1862.3 218.7,1886.5 90.5,1779.0 58.7,1053.2 119.0,1056.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0839/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[177.0,125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7613300568471,42.90805719423223]}},{"type":"Feature","properties":{"resourceCoords":[855.0,125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.75962981420051,42.90810317005055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0840__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 | 1953 | sanborn04023_023 p840 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0840__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0840","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.5,1058.0 215.2,1117.0 215.0,1143.7 578.6,1144.7 578.5,1156.8 799.4,1194.1 812.6,1185.2 851.8,1282.3 888.6,1284.5 887.3,1446.5 884.6,1769.8 1083.5,1780.1 1214.0,1782.5 1318.1,1791.4 1318.4,1830.2 1535.4,1843.1 1544.4,1322.8 1548.6,1323.0 1552.0,1323.2 1566.2,853.5 1542.4,863.8 1542.5,839.2 1576.2,547.3 1592.4,547.2 1605.0,225.3 1521.0,106.5 1111.8,43.9 474.4,72.9 440.6,111.9 438.4,442.9 409.5,457.9 409.5,458.4 408.6,458.4 346.0,491.1 292.0,471.4 251.3,495.7 109.6,491.6 60.5,1058.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0840__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1304.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.71961634426962,42.92394622769121]}},{"type":"Feature","properties":{"resourceCoords":[1323.0,1293.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7194127271583,42.92120380853415]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0841__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 | 1953 | sanborn04023_023 p841 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"8072.0"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0841__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0841","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.9,217.3 94.8,320.5 111.8,859.9 50.8,1270.6 105.0,1766.8 147.7,1833.0 318.2,1879.4 580.7,1865.3 592.0,1840.0 894.0,1862.9 1058.8,1814.5 1193.5,1816.6 1295.4,1821.8 1327.6,1862.4 1553.2,1880.5 1610.4,1717.5 1628.5,788.9 1406.3,785.4 1406.3,784.1 1404.6,784.1 1404.2,707.6 1401.7,617.8 1403.6,614.4 1572.7,617.7 1631.2,617.7 1625.9,253.3 1664.0,253.9 1664.0,239.4 1363.5,225.5 1362.8,186.6 1258.3,179.1 1127.6,178.4 928.2,170.7 928.1,166.7 718.2,201.3 718.5,241.4 490.6,231.1 255.6,221.8 255.3,199.8 118.9,217.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0841__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1136.0,183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.72051210676075,42.91935531157912]}},{"type":"Feature","properties":{"resourceCoords":[721.0,1267.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.72252523280908,42.915316974631295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0842/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 | 1953 | sanborn04023_023 p842","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0842/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0842","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.0,1766.3 438.4,1901.7 66.9,1884.4 172.8,1569.5 226.2,1567.7 199.1,838.8 223.3,838.1 280.4,392.5 261.4,366.8 453.0,280.3 454.4,206.4 779.1,196.1 1419.3,175.8 1500.0,594.0 1580.1,591.4 1571.8,1048.0 1565.8,1518.8 1521.8,1520.6 1564.3,1792.7 1436.0,1766.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0842/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[433.0,844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.72322388420524,42.92124207601388]}},{"type":"Feature","properties":{"resourceCoords":[433.0,616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.72264798756068,42.921237267418604]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0843/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 | 1953 | sanborn04023_023 p843","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.44"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0843/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0843","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"376.8,1844.6 344.7,1843.2 300.6,1026.2 300.4,906.9 305.0,875.8 306.9,871.0 319.2,839.7 348.0,795.2 210.9,744.6 212.2,644.4 121.6,592.0 154.0,362.2 138.8,135.3 253.1,138.7 253.9,175.1 849.9,298.6 859.0,289.7 875.5,273.6 1256.3,227.3 1256.5,250.1 1664.0,257.4 1664.0,259.9 1664.0,261.7 1555.3,257.1 1532.2,348.1 1560.3,966.2 1626.0,970.8 1570.1,1050.4 1567.4,1510.9 1515.1,1861.1 1101.1,1932.2 650.2,1881.2 446.5,1847.5 385.8,1845.0 376.8,1844.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0843/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[295.0,874.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7105404199405,42.924512202746094]}},{"type":"Feature","properties":{"resourceCoords":[295.0,1850.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.71047303581886,42.92091001096349]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0845__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 | 1953 | sanborn04023_023 p845 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.80"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"5073.6"}],"created":"2026-10-17T04:15:20Z","modified":"2026-10-17T04:15:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0845__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0845","type":"ImageService3","width":1665,"height":2018},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.2,628.5 273.4,855.9 270.6,1169.8 377.5,1143.2 383.5,1159.8 698.8,1070.5 808.9,1070.5 1557.8,787.7 1560.4,515.1 1585.2,514.8 1555.9,119.7 816.2,164.7 813.6,340.4 190.0,339.1 190.8,537.9 191.2,628.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114gm:g04023195307:04023_08_1953-0845__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1562.0,339.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.759932,42.911935]}},{"type":"Feature","properties":{"resourceCoords":[190.0,339.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.7632658,42.9118028]}}]}}]}