{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02624_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Davenport, Iowa | 1950 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"120"},{"label":"placed","value":"101"},{"label":"unplaced","value":"19"},{"label":"fit sources","value":"georef 63, georef-snap 37, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 29 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 41.52840,-90.59454 +/-3692m); p45__2 (tier 2, 41.52990,-90.59981 +/-272m); p74__2 (tier 2, 41.53968,-90.58070 +/-178m); p92__2 (tier 1, 41.52079,-90.61517 +/-122m); p92__3 (tier 1, 41.52153,-90.61519 +/-100m); p92__4 (tier 1, 41.51388,-90.61325 +/-100m); p92__6 (tier 1, 41.51029,-90.61450 +/-100m); p92__7 (tier 1, 41.52162,-90.61546 +/-100m); p94__1 (tier 3, 41.50770,-90.60932 +/-562m); p94__2 (tier 1, 41.50840,-90.61626 +/-156m); p94__3 (tier 3, 41.50770,-90.60932 +/-562m); p94__4 (tier 1, 41.50848,-90.61461 +/-178m); p96__2 (tier 1, 41.51997,-90.58816 +/-114m); p96__3 (tier 1, 41.53605,-90.62264 +/-107m); p99__1 (tier 1, 41.54886,-90.61609 +/-201m); p99__2 (tier 1, 41.50877,-90.61739 +/-134m); p99__3 (tier 1, 41.54943,-90.61548 +/-100m); p99__4 (tier 1, 41.54925,-90.61506 +/-100m); p99__5 (tier 1, 41.51051,-90.61628 +/-112m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0001","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"355.5,0.0 789.7,0.0 847.4,36.3 877.0,0.0 1532.6,0.0 1595.0,44.1 1591.8,1924.0 776.3,1908.9 774.5,1949.0 -0.0,1949.0 -0.0,98.3 199.5,244.1 355.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61593582190324,41.51697246214854]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61263427142475,41.5185586163502]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6101465634073,41.51561437637233]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61344811388578,41.51402822217067]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0010","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"9.0,1949.0 -0.0,-0.0 921.2,0.0 923.3,145.2 1610.0,147.4 1610.0,1946.7 9.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60122625088725,41.52304726413077]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5973239719446,41.52305726676867]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59730791238809,41.519495452772894]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60121019133074,41.519485450134994]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p11","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0011","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"594.2,110.5 595.2,0.0 1604.2,0.0 1595.7,938.7 1648.0,932.5 1648.0,1949.0 354.0,1949.0 359.8,109.0 594.2,110.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[591.0,358.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5967671,41.5223457]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,358.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5943588,41.5223575]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p12","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0012","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1610.0,951.2 1610.0,1949.0 -0.0,1949.0 -0.0,1918.7 324.9,1918.6 324.6,924.1 273.4,930.1 281.6,0.0 1250.7,0.0 1241.8,949.5 1610.0,951.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5943588,41.5223575]}},{"type":"Feature","properties":{"resourceCoords":[1246.0,362.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5919961,41.5223686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p13","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0013","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1635.0,1924.3 637.5,1949.0 633.3,1231.3 263.6,1231.7 265.9,278.1 100.5,279.1 100.0,114.4 266.4,112.5 266.6,36.8 1635.0,27.9 1635.0,1924.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[713.0,638.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5909062,41.5223756]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,1918.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5888813,41.5200483]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p14","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"20"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0014","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"382.9,60.8 1501.4,44.0 1488.0,1866.0 1253.8,1868.1 1253.9,1949.0 390.9,1949.0 382.9,60.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[301.0,1246.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5888794,41.5213057]}},{"type":"Feature","properties":{"resourceCoords":[1497.0,646.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5859344,41.5224015]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0015","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1432.8,1266.6 1434.0,1318.0 1248.1,1319.4 1244.4,1932.7 -0.0,1949.0 -0.0,1328.2 234.2,1326.6 245.6,106.8 1441.0,108.7 1417.1,418.1 1269.8,812.4 1230.1,1268.8 1432.8,1266.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[842.0,700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.584471,41.5213079]}},{"type":"Feature","properties":{"resourceCoords":[240.0,700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5859508,41.5213099]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p16","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0016","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"186.9,1272.6 -0.0,1275.8 -0.0,976.7 18.9,813.1 165.9,412.6 188.3,98.7 1428.0,83.0 1428.3,1305.9 1620.0,1303.1 1620.0,1949.0 -0.0,1949.0 -0.0,1327.2 188.5,1324.8 186.9,1272.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1428.0,1279.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5800123,41.5202341]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,83.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5799898,41.5224052]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p17","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0017","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1635.0,1496.2 1149.4,1499.2 1149.2,1949.0 725.5,1949.0 726.9,1501.7 532.0,1502.9 534.6,625.1 1150.0,624.1 1150.0,1444.2 1635.0,1443.7 1635.0,1496.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1150.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785311,41.521323]}},{"type":"Feature","properties":{"resourceCoords":[1150.0,249.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785244,41.5224195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p18","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0018","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1125.0,243.2 1124.7,1479.1 1208.8,1479.0 1207.2,1946.2 509.7,1949.0 511.2,243.9 1125.0,243.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[511.0,852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785311,41.521323]}},{"type":"Feature","properties":{"resourceCoords":[1125.0,852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.577052,41.5213184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p19","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0019","type":"ImageService3","width":1635,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"572.2,1461.2 346.6,1460.8 346.9,1406.9 482.7,1407.3 490.6,181.9 1116.7,178.8 1111.4,1413.3 572.6,1408.4 572.2,1461.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[488.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.577052,41.5213184]}},{"type":"Feature","properties":{"resourceCoords":[1112.0,812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5756,41.5213182]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0002","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"97.8,64.3 -0.0,-0.0 582.0,0.0 1545.1,597.8 1514.5,1928.0 127.1,1920.2 97.8,64.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61296548899442,41.518447805789705]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60966260746657,41.51997383469991]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6072126566546,41.51695895270241]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61051553818244,41.515432923792204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p20","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0020","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1620.0,0.0 1620.0,1949.0 -0.0,1949.0 -0.0,1436.5 514.6,1437.5 511.0,258.0 1129.6,250.3 1125.0,0.0 1620.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[511.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5756,41.5213182]}},{"type":"Feature","properties":{"resourceCoords":[511.0,258.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755889,41.5224214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0021","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1245.3 0.0,0.0 50.1,0.0 49.8,143.0 1207.0,145.3 1422.2,0.0 1606.3,0.0 1580.8,1882.7 93.6,1882.3 127.3,1252.0 -0.0,1245.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61500133290598,41.52458513413125]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61109031253571,41.52460747948962]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61105474478833,41.5210685438071]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6149657651586,41.52104619844873]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p22","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0022","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"11.3,80.3 1624.0,76.5 1624.0,1869.8 -0.0,1883.7 11.3,80.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[815.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.60917,41.5234072]}},{"type":"Feature","properties":{"resourceCoords":[815.0,1878.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.609174,41.521192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0023","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1884.8 -0.0,93.0 1624.0,71.3 1624.0,1689.2 795.0,1909.2 794.5,1874.2 -0.0,1884.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60714444386402,41.52466963842875]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60318543952967,41.5246553363424]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60320820458448,41.52107298398052]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60716720891882,41.521087286066866]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p24","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0024","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"963.3,78.5 963.9,0.0 1512.1,0.0 1509.4,680.6 1624.0,680.0 1624.0,897.1 951.6,896.7 955.8,1949.0 839.0,1536.4 131.2,1718.8 155.7,78.8 963.3,78.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[965.0,683.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.601196,41.5234349]}},{"type":"Feature","properties":{"resourceCoords":[965.0,1294.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.60119,41.522327]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p25","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0025","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,337.1 24.0,337.0 27.5,122.8 1477.2,121.5 1476.8,6.7 1624.0,6.2 1624.0,365.9 1477.9,365.3 1482.6,1839.0 1283.8,1840.2 1283.5,1949.0 366.9,1949.0 364.3,1803.0 115.2,1803.8 114.4,1587.1 -0.0,1588.0 -0.0,337.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1159.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.597066,41.525716]}},{"type":"Feature","properties":{"resourceCoords":[24.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5998197,41.5257157]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p26","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0026","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"149.2,0.0 1582.0,0.0 1574.0,1597.0 1624.0,1596.6 1624.0,1840.7 -0.0,1857.7 -0.0,363.5 148.1,364.7 149.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[825.0,370.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.594318,41.525658]}},{"type":"Feature","properties":{"resourceCoords":[1574.0,1597.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.592516,41.5234642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0027","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1311.8,53.8 1290.5,1878.3 279.7,1873.8 278.6,1949.0 110.3,1949.0 110.9,1873.1 61.0,1872.8 86.8,48.0 1311.8,53.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59271453316352,41.52685112540442]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58881770773816,41.526885131726054]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58876357697936,41.52335916571378]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59266040240472,41.523325159392144]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p28","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0028","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1502.5,1860.2 -0.0,1876.3 -0.0,60.0 1516.5,59.0 1502.5,1860.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[228.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.589012,41.525669]}},{"type":"Feature","properties":{"resourceCoords":[1510.0,658.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5858996,41.5256943]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p29","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0029","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.5,80.5 1232.6,74.1 1244.1,1886.0 222.4,1891.1 221.5,80.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[224.0,1282.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5859181,41.5235092]}},{"type":"Feature","properties":{"resourceCoords":[1432.0,1885.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5829959,41.5223941]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p3","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0003","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.4,1949.0 79.0,150.7 1648.0,107.2 1648.0,1949.0 138.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6079980939668,41.51680372298916]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60602059195226,41.51420290621692]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61013254834472,41.51245351293255]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61211005035926,41.51505432970479]}},{"type":"Feature","properties":{"resourceCoords":[82.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.608434,41.516447]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0030","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1889.0 -0.0,79.3 1628.0,61.2 1628.0,1260.2 1435.2,1260.7 1433.7,1880.7 -0.0,1889.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58344302158663,41.52583499716991]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57951125189722,41.52582890265079]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57952092907007,41.522280001581336]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58345269875949,41.52228609610046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p31","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0031","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1425.0,1578.1 812.0,1582.9 811.4,1949.0 202.8,1949.0 205.4,962.6 398.4,961.9 397.9,346.1 1429.6,341.7 1425.0,1578.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.0,1578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785244,41.5224195]}},{"type":"Feature","properties":{"resourceCoords":[812.0,344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785156,41.5246478]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p32","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0032","type":"ImageService3","width":1630,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1630.0,1331.0 1426.8,1331.3 1427.0,1340.6 1431.0,1535.2 1431.7,1584.4 201.2,1601.2 198.5,363.2 1630.0,349.6 1630.0,1331.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,1593.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755889,41.5224214]}},{"type":"Feature","properties":{"resourceCoords":[806.0,357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755627,41.5246501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0033","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1624.0,708.2 1624.0,1548.1 1512.6,1658.0 1515.0,1806.4 1339.3,1806.8 1146.5,1949.0 -0.0,1949.0 0.0,0.0 1624.0,0.0 1594.2,10.4 1590.6,594.2 1624.0,708.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61490573636875,41.527951674906355]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61089886958901,41.52796860306333]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61087192320183,41.52434312181083]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61487878998157,41.524326193653856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0034","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1633.0,1905.6 3.0,1895.0 -0.0,1682.3 114.0,1570.3 115.7,712.7 72.2,431.9 86.6,0.0 1522.0,0.0 1633.0,1905.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6111814391258,41.527947781184366]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60723594698081,41.52797014591447]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60720054274651,41.52441987947395]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6111460348915,41.524397514743846]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0035","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,20.6 1555.2,0.5 1525.2,1922.6 118.6,1913.3 102.5,1949.0 -0.0,491.5 -0.0,20.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60750480097202,41.52800649392106]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60355188535281,41.52805171683458]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60347989893349,41.52447506110675]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6074328145527,41.52442983819323]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0036","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1626.8,134.6 1583.6,1841.8 1036.6,1844.3 1036.4,1922.1 -0.0,1928.1 0.0,0.0 30.1,0.0 29.3,131.0 1626.8,134.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6037194790281,41.52804893754131]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5997560257251,41.528047688820564]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59975800250048,41.524481264138394]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60372145580348,41.52448251285914]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0037","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.8,58.3 83.9,58.7 85.3,0.0 1624.0,0.0 1624.0,67.3 1495.8,65.8 1482.9,1949.0 14.8,1949.0 47.8,58.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59985163572394,41.52962518449692]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59596084185874,41.52962819474173]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59595604999176,41.5261078360747]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59984684385695,41.52610482582989]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0038","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,69.3 128.7,70.3 128.5,2.8 340.9,0.0 339.4,72.0 824.5,75.8 878.7,0.0 1019.8,0.0 1564.7,455.7 1578.6,1834.5 -0.0,1843.5 -0.0,69.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0038/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59626757879307,41.529633774554895]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59236930209424,41.5296268440548]}},{"type":"Feature","properties":{"resourceCoords":[1633.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59238027363054,41.52611915489762]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59627855032937,41.52612608539771]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p39","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0039","type":"ImageService3","width":1630,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,642.4 -0.0,413.6 504.7,421.7 507.9,221.6 520.2,252.0 1397.8,253.9 1408.3,1815.3 82.0,1833.0 62.6,727.7 -0.0,642.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1450.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.589147,41.529914]}},{"type":"Feature","properties":{"resourceCoords":[82.0,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5925048,41.526766]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0004","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1880.8 -0.0,1165.2 582.3,121.8 1509.0,655.8 1587.2,648.7 1603.9,1886.7 -0.0,1880.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60546322554846,41.521151589267554]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60350108418734,41.518625170151076]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60755718239493,41.51683415542847]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60951932375605,41.51936057454495]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p40","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0040","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1833.3 -0.0,261.6 55.4,262.0 53.6,104.0 709.9,109.6 710.8,0.0 788.0,0.0 788.3,110.3 1413.0,160.7 1402.2,1833.7 -0.0,1833.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1407.0,698.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5858732,41.5288393]}},{"type":"Feature","properties":{"resourceCoords":[60.0,685.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.589131,41.528862]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p41","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0041","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.4,1847.2 192.2,120.0 1400.7,106.1 1413.9,1835.5 201.4,1847.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[804.0,1848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.584434,41.52568]}},{"type":"Feature","properties":{"resourceCoords":[804.0,113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.584385,41.528839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p42","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0042","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"197.0,1868.7 211.8,129.6 1634.0,114.2 1634.0,1859.7 197.0,1868.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[204.0,1265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5829399,41.526783]}},{"type":"Feature","properties":{"resourceCoords":[1428.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.579973,41.525712]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p43","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0043","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"389.2,1855.7 401.4,0.0 1399.7,0.0 1420.0,1855.0 389.2,1855.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,1855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785156,41.5246478]}},{"type":"Feature","properties":{"resourceCoords":[1420.0,1855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.577026,41.5246486]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p44","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0044","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,1865.3 227.4,1851.6 220.3,0.0 1462.7,0.0 1456.0,325.6 1590.1,327.1 1593.8,0.0 1631.0,0.0 1631.0,1865.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[829.0,1273.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.575562,41.525725]}},{"type":"Feature","properties":{"resourceCoords":[829.0,678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755773,41.52682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0045__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p45 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6480.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0045__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0045","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1585.9,954.4 1620.0,954.0 1620.0,470.8 1165.5,469.0 1165.1,0.0 44.2,0.0 62.0,1892.0 1593.1,1861.1 1585.9,954.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0045__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1591.0,1473.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.599754,41.528537]}},{"type":"Feature","properties":{"resourceCoords":[62.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6036487,41.5278092]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0046","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,104.5 1606.0,87.5 1603.4,1809.5 1631.0,1809.6 1631.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60261455636395,41.53497262339133]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59869578619485,41.53494411256557]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59874098017258,41.53141394940589]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60265975034167,41.53144246023165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p47 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2735.6"},{"label":"split_canvas_w","value":"6480.0"},{"label":"split_canvas_h","value":"5060.4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"468.0,1888.0 582.6,1757.5 842.8,1949.0 869.0,1949.0 1089.0,1949.0 1620.0,1949.0 1620.0,1752.2 1598.8,1664.9 1585.2,690.5 1417.5,689.9 -0.0,740.2 -0.0,1893.7 468.0,1888.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[468.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5942998,41.5294938]}},{"type":"Feature","properties":{"resourceCoords":[1574.0,708.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591499,41.531633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p47 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6480.0"},{"label":"split_canvas_h","value":"2762.8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,379.5 0.0,683.9 1452.5,690.0 1284.0,33.9 916.9,131.5 916.5,130.1 -0.0,379.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0047__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59837243845354,41.53232896030532]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59458662616294,41.53153449820593]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,690.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59503964924225,41.53032657868931]}},{"type":"Feature","properties":{"resourceCoords":[0.0,690.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59882546153285,41.531121040788705]}},{"type":"Feature","properties":{"resourceCoords":[1051.0,653.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5963451,41.5306703]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0048","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1858.0 -0.0,112.3 1631.0,91.2 1631.0,1791.3 972.3,1791.5 975.4,1949.0 33.0,1949.0 -0.0,1858.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59145317038853,41.53318311576076]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58752323595493,41.53315804670877]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58756297308665,41.52961772721878]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59149290752025,41.529642796270764]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0049","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"665.8,1330.4 44.8,1279.0 44.7,1170.1 -0.0,1170.0 -0.0,-0.0 1617.3,0.0 1617.2,49.9 1530.5,49.0 1520.9,1862.6 658.3,1860.9 665.8,1330.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58748819442633,41.53224818232695]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58354753398095,41.532257100832375]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58353330125699,41.5286830006778]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58747396170237,41.52867408217238]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p5","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0005","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1611.9,74.0 1638.4,106.2 1648.0,1949.0 -0.0,1949.0 -0.0,76.9 1611.9,74.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60831793553317,41.51666316540509]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60489711319056,41.51821383598498]}},{"type":"Feature","properties":{"resourceCoords":[1648.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60244546420411,41.51518761219902]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60586628654671,41.51363694161913]}},{"type":"Feature","properties":{"resourceCoords":[379.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.607435,41.516901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0050","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1898.2 -0.0,64.8 364.0,66.6 361.9,232.4 1288.8,237.1 1289.9,0.0 1608.7,0.0 1624.0,1875.2 -0.0,1898.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5837646206235,41.53228434949266]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57985472182712,41.53227761889321]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57986543638937,41.52874011881489]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58377533518575,41.52874684941434]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0051","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"266.8,1206.8 248.5,56.3 1385.3,64.8 1432.8,1702.4 422.9,1698.5 423.0,1208.3 266.8,1206.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58051221456071,41.53103979270248]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57666204377927,41.53105308177264]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5766408368397,41.52756095309074]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58049100762115,41.52754766402058]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p52","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0052/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0052","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1488.6,1949.0 1491.6,1620.3 237.4,1634.4 183.6,55.1 183.1,0.0 871.6,0.0 867.0,239.5 1624.0,252.6 1624.0,1949.0 1488.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0052/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1492.0,1578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.574036,41.528157]}},{"type":"Feature","properties":{"resourceCoords":[867.0,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755552,41.5305979]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0053","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"52.0,132.8 1476.3,118.8 1474.3,1849.0 127.7,1851.3 79.4,1949.0 79.3,1851.3 51.8,1851.2 52.0,132.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59887975661697,41.53502810897811]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59497933067779,41.5349958571083]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59503080194753,41.53145836319559]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59893122788671,41.5314906150654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p54","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0054","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1579.4,1827.6 -0.0,1841.3 -0.0,133.2 1575.6,125.2 1579.4,1827.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1580.0,1269.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591481,41.53266]}},{"type":"Feature","properties":{"resourceCoords":[1580.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591464,41.533719]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p55","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0055","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1725.5 -0.0,1316.0 52.2,1315.8 63.3,164.9 1620.0,147.2 1620.0,1723.7 -0.0,1725.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[698.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5857975,41.5340382]}},{"type":"Feature","properties":{"resourceCoords":[64.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.587337,41.534036]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p56","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0056","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1591.2,131.9 1610.6,1703.7 1290.0,1703.1 1290.2,1949.0 357.7,1949.0 359.0,1781.0 81.0,1781.1 65.7,130.7 1591.2,131.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[359.0,1781.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5828886,41.532162]}},{"type":"Feature","properties":{"resourceCoords":[359.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5828595,41.5351101]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0057","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1396.7,1752.6 270.3,1743.5 286.2,20.9 1399.2,27.2 1396.7,1752.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5805906767305,41.534091302743796]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57670963127599,41.53410624968492]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57668574806883,41.53058193198594]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58056679352333,41.53056698504482]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p58","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0058","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"163.7,1677.4 160.1,0.0 1624.0,0.0 1624.0,1949.0 852.5,1920.5 857.8,1679.1 163.7,1677.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1474.0,560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5740594,41.5330605]}},{"type":"Feature","properties":{"resourceCoords":[164.0,1733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.577219,41.530935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0059","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1618.0,39.2 1618.0,1932.6 -0.0,1949.0 -0.0,31.7 1618.0,39.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60623913922447,41.53831799967981]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60231095444784,41.538322936302336]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60230306587204,41.53475604504742]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60623125064866,41.5347511084249]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0006","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1610.0,57.1 1610.0,1949.0 248.3,1922.8 108.8,114.9 62.0,18.9 247.7,59.8 1610.0,57.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60509192062202,41.51810628604037]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60162261491413,41.51943930678675]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5994825361586,41.516272499397836]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60295184186648,41.514939478651456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0060","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1600.5,31.1 1584.6,1933.2 121.7,1934.4 98.6,37.6 1600.5,31.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6025938773022,41.53831990407442]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59865843876031,41.53831733238601]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59866253305941,41.53475705738249]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6025979716013,41.534759629070905]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0061/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0061","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1481.9,1921.3 51.2,1930.5 54.3,31.4 1575.5,19.9 1568.2,777.1 1493.3,778.4 1481.9,1921.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59884666375606,41.53831876677067]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.594919569766,41.538296235125074]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59495557464585,41.53473033245574]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59888266863591,41.534752864101335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p62","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0062/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0062","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1552.3,0.0 1564.4,1911.2 -0.0,1927.6 -0.0,785.6 74.2,783.6 74.0,27.0 1552.3,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1557.0,1346.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591452,41.535798]}},{"type":"Feature","properties":{"resourceCoords":[74.0,27.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5950232,41.5382604]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p63","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0063/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0063","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1479.9,1859.7 96.4,1835.7 104.2,102.8 1489.7,119.1 1479.9,1859.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[702.0,774.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.588874,41.5371905]}},{"type":"Feature","properties":{"resourceCoords":[702.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591428,41.537184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p64","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0064/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0064","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1839.4 -0.0,112.8 1557.6,140.9 1557.7,193.7 1627.0,193.8 1557.8,208.4 1559.3,1846.3 1627.0,1858.0 -0.0,1839.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[977.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591462,41.534025]}},{"type":"Feature","properties":{"resourceCoords":[977.0,128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.587337,41.534036]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p65","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0065/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0065","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1618.0,1833.2 33.0,1865.9 44.8,115.2 1618.0,94.5 1618.0,1833.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0065/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58738690710042,41.53846912750707]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58349442039976,41.53844701717931]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58352975212645,41.5349125488104]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58742223882712,41.53493465913816]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p66","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0066/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0066","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1580.7,1839.0 85.8,1837.0 86.9,96.2 1591.8,79.6 1605.1,1252.3 1574.2,1252.7 1580.7,1839.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0066/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[362.0,1842.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5828595,41.5351101]}},{"type":"Feature","properties":{"resourceCoords":[362.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5828303,41.5382781]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p67","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0067","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"266.2,1921.0 295.8,172.1 851.3,183.0 853.5,15.3 1375.3,30.1 1374.5,1936.0 266.2,1921.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[850.0,1356.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785027,41.5350969]}},{"type":"Feature","properties":{"resourceCoords":[266.0,1931.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5799038,41.5340561]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p68","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0068","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.2,462.3 1624.0,449.1 1624.0,1673.6 193.1,1685.7 167.2,462.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[185.0,1225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.577247,41.534905]}},{"type":"Feature","properties":{"resourceCoords":[1489.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5740666,41.5367643]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p69","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0069/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0069","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.8,1915.9 59.0,0.0 1501.3,0.0 1498.8,1893.3 30.8,1915.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0069/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60114384684543,41.54168308606159]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59731839855037,41.54165367783438]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59736565736857,41.53816082800239]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.60119110566363,41.538190236229596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p7","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0007","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.4,524.9 -0.0,524.9 -0.0,179.3 21.6,180.4 -0.0,41.8 1381.9,45.7 1354.8,1251.4 1501.2,1253.0 499.9,1902.9 494.3,1949.0 65.8,1949.0 68.4,524.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1380.0,668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.612071,41.520055]}},{"type":"Feature","properties":{"resourceCoords":[68.0,668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6152358,41.520043]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0070","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1895.4 0.0,0.0 1586.1,0.0 1575.8,1876.7 -0.0,1895.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59757348405562,41.54172126017267]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5936422584594,41.54168715785052]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59369655445083,41.53813087921824]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59762778004705,41.53816498154039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p71","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0071/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0071","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"23.8,1921.8 56.1,0.0 1556.0,0.0 1526.2,1927.4 23.8,1921.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1049.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591355,41.540678]}},{"type":"Feature","properties":{"resourceCoords":[44.0,1251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.593763,41.539467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0072","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,0.0 1631.0,1904.0 -0.0,1934.9 -0.0,-0.0 1631.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59013882136331,41.54177803313777]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58619819286974,41.541732136155915]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58627095415888,41.53818265404201]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.59021158265244,41.53822855102386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0073","type":"ImageService3","width":1609,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1593.8,1889.3 169.0,1897.8 197.0,0.0 1608.0,0.0 1593.8,1889.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58667404207817,41.541717355239136]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58279057049434,41.5417153748844]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5827937529097,41.53816954535207]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58667722449353,41.53817152570681]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0074__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p74 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6524.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0074__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0074","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,1504.3 1631.0,475.5 1196.3,475.5 1195.6,0.0 251.6,0.0 224.2,1897.6 1631.0,1901.6 1631.0,1504.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0074__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[240.0,741.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.58281,41.5403632]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5798542,41.538287]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0075/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p75","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0075/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0075","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1565.5,668.8 1515.0,1949.0 626.9,1949.0 620.2,1314.3 -0.0,1320.9 -0.0,-0.0 1612.0,0.0 1612.0,669.2 1565.5,668.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0075/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1010.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5785226,41.5418426]}},{"type":"Feature","properties":{"resourceCoords":[446.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5798944,41.5418469]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0076/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p76","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0076/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0076","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.6,1336.1 475.1,1336.9 472.4,88.6 1366.7,96.0 1381.0,1777.9 860.6,1763.0 858.4,1929.2 304.3,1918.2 304.6,1336.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0076/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58060324060256,41.540717011942014]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57666423379115,41.54072944757084]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57664451967548,41.53718137137005]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58058352648689,41.53716893574123]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p77","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0077/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0077","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1497.3,1846.0 159.3,1862.2 141.2,807.3 189.8,0.0 1618.0,0.0 1618.0,1689.7 1495.0,1692.0 1497.3,1846.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0077/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[852.0,1202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755784,41.5406643]}},{"type":"Feature","properties":{"resourceCoords":[1495.0,1692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5740175,41.5397518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p78","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"11"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0078/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0078","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,1949.0 162.4,1949.0 159.0,222.0 1492.2,224.5 1492.0,71.0 1614.8,70.5 1631.0,0.0 1631.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0078/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[856.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5755807,41.5394715]}},{"type":"Feature","properties":{"resourceCoords":[159.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5772946,41.5394688]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p79","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0079/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0079","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"531.5,1760.0 -0.0,1770.8 0.0,-0.0 18.4,59.5 1559.2,49.0 1553.2,1119.6 1618.0,1119.3 1618.0,1949.0 521.9,1949.0 531.5,1760.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0079/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1015.0,589.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.575746,41.547652]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,589.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.57443,41.547642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p80","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0080","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"251.9,1125.8 187.1,1126.5 188.1,137.3 1631.0,124.9 1631.0,1949.0 255.7,1949.0 251.9,1125.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[673.0,1122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.573267,41.546671]}},{"type":"Feature","properties":{"resourceCoords":[673.0,594.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.573248,41.547633]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0081/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p81","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0081/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0081","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1860.7 0.0,-0.0 1570.6,0.0 1556.5,1859.1 -0.0,1860.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0081/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5781379559667,41.552011280224775]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57424160049827,41.55199860138126]}},{"type":"Feature","properties":{"resourceCoords":[1618.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57426186519187,41.54846135904071]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5781582206603,41.548474037884226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0082/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p82","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"21"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0082/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0082","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.9,1949.0 47.0,0.0 1631.0,0.0 1631.0,1949.0 35.9,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0082/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.573212,41.550667]}},{"type":"Feature","properties":{"resourceCoords":[520.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.573229,41.548617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0083/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p83","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0083/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0083","type":"ImageService3","width":1618,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1601.0,0.0 1557.0,1904.2 -0.0,1902.3 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0083/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1134.0,564.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.602131,41.540667]}},{"type":"Feature","properties":{"resourceCoords":[533.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.603584,41.538254]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0084/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p84","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0084/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0084","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,1932.6 428.4,1949.0 424.8,1860.9 -0.0,1949.0 -0.0,-0.0 1631.0,0.0 1631.0,1932.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0084/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[425.0,1855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.622298,41.517138]}},{"type":"Feature","properties":{"resourceCoords":[117.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6240192,41.518413]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0085/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p85","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0085/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0085","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1109.9,0.0 1122.8,218.1 1537.0,100.5 1546.3,193.3 1583.4,191.1 1516.8,1891.7 -0.0,1896.1 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0085/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1054.0,1346.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.622128,41.514725]}},{"type":"Feature","properties":{"resourceCoords":[1054.0,1894.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.621585,41.513821]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0086/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p86","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0086/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0086","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1472.4,0.0 1303.5,418.4 1303.5,615.3 1555.8,783.0 1466.9,799.9 1404.6,1196.2 1439.8,1862.7 -0.0,1908.0 4.1,233.8 1138.3,115.5 1127.2,0.0 1472.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0086/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62233155653809,41.51741840891037]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61864697360798,41.51855539098996]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61684515457993,41.51523532632435]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62052973751004,41.514098344244765]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0087/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p87","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0087/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0087","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,76.3 1596.7,78.9 1594.8,1682.4 1629.0,1673.4 1629.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0087/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62395160298823,41.51317013719362]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62041031579736,41.51437723495376]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61849515532168,41.51118216823187]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62203644251255,41.509975070471725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p88","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0088/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0088","type":"ImageService3","width":1631,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.3,87.0 1445.8,84.9 1631.0,1233.4 1631.0,1422.9 1543.5,1433.2 1625.0,1949.0 104.0,1940.0 102.3,1666.9 68.5,1676.0 60.3,87.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0088/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62062068951714,41.51432389637881]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61703257726343,41.515526350748]}},{"type":"Feature","properties":{"resourceCoords":[1631.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61512709038935,41.51229306252163]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61871520264306,41.51109060815244]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0089/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0089","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.5,1532.9 85.7,637.4 129.7,538.1 106.2,566.4 106.3,548.8 -0.0,548.2 -0.0,-0.0 1124.0,0.0 1434.0,705.0 1629.0,606.9 1629.0,1949.0 -0.0,1949.0 -0.0,1532.5 78.5,1532.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62879658018129,41.512416557389884]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6211559139468,41.51247599940994]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62106160893926,41.50558199519937]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62870227517375,41.50552255317931]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p8 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5095.6"},{"label":"split_canvas_w","value":"6440.0"},{"label":"split_canvas_h","value":"2700.4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"350.4,1949.0 1546.0,1916.0 1546.0,1324.8 765.3,1333.6 756.1,1274.0 756.1,1274.0 756.2,1333.8 344.0,1338.5 350.4,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1546.0,1324.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6052295,41.5212177]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,1916.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6052334,41.520118]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p8 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6440.0"},{"label":"split_canvas_h","value":"5096.8"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008","type":"ImageService3","width":1610,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.0,67.0 -0.0,1257.0 1243.0,1274.0 1259.8,1274.0 1125.6,1035.1 1610.0,754.5 1610.0,68.9 30.0,67.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0008__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[588.0,67.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.610711,41.521187]}},{"type":"Feature","properties":{"resourceCoords":[30.0,67.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.612074,41.521179]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p9","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0009","type":"ImageService3","width":1648,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1315.2,214.6 1370.6,-0.0 1648.0,-0.0 1648.0,318.6 1350.5,382.7 1648.0,1702.5 1648.0,1916.3 572.3,1652.8 552.8,1744.5 -0.0,1597.5 -0.0,0.0 504.5,-0.0 1315.2,214.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1120.0,1792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6049961,41.5191033]}},{"type":"Feature","properties":{"resourceCoords":[1313.0,203.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.601163,41.519495]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p90 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"35"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6568.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.8,1223.8 43.8,1719.0 -0.0,1720.1 -0.0,1750.2 173.4,1920.6 172.6,1772.2 1642.0,1770.0 1642.0,1314.0 1034.6,1317.4 1024.8,0.0 -0.0,-0.0 0.0,214.0 0.0,493.0 0.0,809.0 0.0,1040.0 -0.0,1223.9 48.8,1223.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1239.0,1441.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.59978,41.542839]}},{"type":"Feature","properties":{"resourceCoords":[745.0,1714.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6021377,41.5418799]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p90 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"4099.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2468.8"},{"label":"split_canvas_h","value":"5269.6"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1121.4,1142.3 1118.2,1161.3 1608.8,1165.7 1607.6,1314.2 1640.5,1314.0 1629.7,1289.3 1642.0,341.1 1307.0,0.0 1245.2,0.0 1173.5,197.3 1125.0,512.3 1121.4,1142.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0090__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1121.7,977.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.61625,41.513966]}},{"type":"Feature","properties":{"resourceCoords":[1121.7,1239.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6155758,41.5131952]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p91","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"25"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0091/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0091","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1629.0,0.0 1589.5,175.6 1583.9,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0091/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[450.0,697.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.631075,41.509223]}},{"type":"Feature","properties":{"resourceCoords":[1586.0,697.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6283652,41.5092338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p92 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3630.0"},{"label":"split_canvas_h","value":"4247.6"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"588.0,0.0 397.0,0.0 0.0,0.0 -0.0,950.8 150.1,974.4 147.7,1047.2 723.5,1058.4 891.2,1061.9 892.7,971.3 907.5,0.0 588.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__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":[-90.6138486016646,41.51435154282883]}},{"type":"Feature","properties":{"resourceCoords":[907.5,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61265828817784,41.51296630418513]}},{"type":"Feature","properties":{"resourceCoords":[907.5,1061.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61482662097853,41.51192375999425]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1061.9],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61601693446529,41.513308998637946]}},{"type":"Feature","properties":{"resourceCoords":[151.1,942.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6155758,41.5131952]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p92 [5]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4177.6"},{"label":"split_canvas_w","value":"2894.0"},{"label":"split_canvas_h","value":"3618.4"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 436.9,1949.0 403.8,1790.1 716.6,1778.8 719.3,1479.5 723.5,1058.4 0.0,1044.4 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0092__5/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[14.0,1180.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6161617,41.5221519]}},{"type":"Feature","properties":{"resourceCoords":[376.2,1791.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6154657,41.5211738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p93","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0093/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0093","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1629.0,1949.0 -0.0,1949.0 -0.0,-0.0 1629.0,0.0 1629.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0093/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1467.0,617.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.591263,41.544252]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5913423,41.5418903]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p95","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0095/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0095","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.5,0.0 1582.5,1430.1 1629.0,1430.0 1629.0,1631.2 1582.3,1647.3 1585.1,1949.0 1416.8,1949.0 75.5,1673.3 -0.0,1486.5 -0.0,-0.0 1584.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0095/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61901668365792,41.52028826198994]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61513073690583,41.52030188664908]}},{"type":"Feature","properties":{"resourceCoords":[1629.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61510911814354,41.51679619935455]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61899506489563,41.51678257469541]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0096__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p96 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6580.0"},{"label":"split_canvas_h","value":"4885.6"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0096__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0096","type":"ImageService3","width":1645,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1645.0,0.0 -0.0,-0.0 0.0,1220.7 874.6,1221.1 1645.0,1221.4 1645.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0096__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":[-90.6229297157016,41.538424386997924]}},{"type":"Feature","properties":{"resourceCoords":[1645.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61893724732357,41.538452768547124]}},{"type":"Feature","properties":{"resourceCoords":[1645.0,1221.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.61890908490359,41.53623606745448]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1221.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.62290155328162,41.53620768590528]}},{"type":"Feature","properties":{"resourceCoords":[88.0,136.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.622713,41.538179]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0097/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0097","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1621.0,1949.0 -0.0,1949.0 -0.0,546.3 684.5,545.5 672.9,4.3 1621.0,-0.0 1621.0,33.8 1467.0,34.9 1478.8,1676.0 1621.0,1675.0 1621.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57692251690285,41.54674051522744]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.57696657024754,41.54382187899316]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.58162246172309,41.54386180111877]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.5815784083784,41.54678043735306]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1950 | sanborn02624_006 p98","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"18"}],"created":"2026-09-21T12:20:36Z","modified":"2026-09-21T12:20:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0098/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0098","type":"ImageService3","width":1645,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"475.9,294.6 476.8,367.5 678.1,168.0 1490.3,173.1 1489.4,460.2 1645.0,460.7 1645.0,1949.0 -0.0,1949.0 -0.0,284.2 475.9,294.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195001:02624_01_1950-0098/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1011.0,1387.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.610674,41.539949]}},{"type":"Feature","properties":{"resourceCoords":[541.0,1885.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.613062,41.54162]}}]}}]}