{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07578_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chester, Pennsylvania | 1898 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"68"},{"label":"placed","value":"59"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef 37, georef-snap 17, snap:0 3, georef-street 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"12 sheet(s) cut into 25 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 39.84521,-75.36910 +/-3217m); p13__1 (tier 1, 39.84484,-75.36981 +/-100m); p23 (tier 2, 39.83033,-75.38473 +/-100m); p24__2 (tier 1, 39.82824,-75.39333 +/-129m); p25 (tier 1, 39.83354,-75.38090 +/-266m); p41__2 (tier 1, 39.85398,-75.36016 +/-100m); p50__1 (tier 2, 39.85494,-75.35552 +/-742m); p53__2 (tier 1, 39.85513,-75.34111 +/-135m); p7__2 (tier 1, 39.84009,-75.38279 +/-122m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p1","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0001","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1685.0,0.0 1685.0,1324.6 1565.7,1324.8 1577.6,1941.3 1685.0,1938.5 1685.0,1979.0 -0.0,1979.0 -0.0,1259.2 71.7,1258.0 66.3,80.6 -0.0,81.7 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[72.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3964865,39.8274557]}},{"type":"Feature","properties":{"resourceCoords":[1610.0,1326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3932433,39.8290881]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p10 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2696.8"},{"label":"split_canvas_w","value":"6768.0"},{"label":"split_canvas_h","value":"5219.2"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010","type":"ImageService3","width":1692,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"320.6,1005.2 160.8,1005.2 172.8,1551.2 87.0,1551.7 87.0,1790.0 1101.4,1783.8 1100.9,1707.6 1591.2,1704.6 1617.1,1541.7 1692.0,1540.9 1692.0,684.4 665.9,678.2 665.9,1005.2 562.8,1005.2 561.1,839.8 318.0,844.1 320.6,1005.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1101.0,1379.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3737663,39.8417299]}},{"type":"Feature","properties":{"resourceCoords":[87.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3752293,39.8400657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p10 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6768.0"},{"label":"split_canvas_h","value":"2737.6"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010","type":"ImageService3","width":1692,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 20.5,515.0 1627.7,515.0 1633.6,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1117.0,613.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3984263,39.8279466]}},{"type":"Feature","properties":{"resourceCoords":[1626.0,613.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3973798,39.828492]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p11 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2112.8"},{"label":"split_canvas_w","value":"6768.0"},{"label":"split_canvas_h","value":"5803.2"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011","type":"ImageService3","width":1692,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.6,1321.0 -0.0,1322.9 -0.0,1979.0 230.0,1979.0 517.0,1979.0 1125.8,1979.0 1122.5,1845.5 1638.5,1838.1 1640.2,1979.0 1692.0,1979.0 1692.0,589.4 80.2,610.2 90.6,1321.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,1302.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3758147,39.8382287]}},{"type":"Feature","properties":{"resourceCoords":[1109.0,605.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3762256,39.8395323]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p11 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6768.0"},{"label":"split_canvas_h","value":"2113.6"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011","type":"ImageService3","width":1692,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 0.0,387.4 61.6,387.4 61.4,481.4 1625.0,481.4 1624.4,2.9 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[581.0,481.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3842764,39.8365298]}},{"type":"Feature","properties":{"resourceCoords":[1625.0,481.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3821336,39.8376487]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p12 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2098.0"},{"label":"split_canvas_w","value":"6760.0"},{"label":"split_canvas_h","value":"5818.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.3,601.5 150.6,1845.0 1626.7,1852.2 1633.6,1298.2 1690.0,1297.3 1690.0,860.2 1641.0,859.9 1640.6,524.9 1128.0,524.8 1128.0,601.5 172.3,601.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1128.0,601.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3732257,39.8411138]}},{"type":"Feature","properties":{"resourceCoords":[104.0,601.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3752293,39.8400657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p12 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6760.0"},{"label":"split_canvas_h","value":"2099.6"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1644.9,0.0 93.2,-0.0 95.0,478.9 1645.0,478.9 1644.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[95.0,478.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3821336,39.8376487]}},{"type":"Feature","properties":{"resourceCoords":[1645.0,478.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.378954,39.8393014]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p13 [2]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6752.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0013","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1178.7,1391.1 1360.6,1379.9 1546.0,61.0 595.0,7.5 546.7,835.9 571.7,1089.2 -0.0,1056.8 0.0,1361.0 535.5,1360.1 540.8,1879.8 1169.2,1814.5 1178.7,1391.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[607.0,1449.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3722351,39.8433229]}},{"type":"Feature","properties":{"resourceCoords":[1413.0,1871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3722221,39.8416421]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0014","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"515.2,1856.7 522.7,1905.7 191.5,1979.0 23.6,1979.0 -0.0,1467.7 185.7,1446.1 310.1,80.0 1457.8,86.8 1457.6,121.5 1688.0,119.1 1688.0,1979.0 1547.5,1979.0 1513.2,1756.4 960.4,1840.8 950.6,1784.6 515.2,1856.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36836321573105,39.84356227808061]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36669431996431,39.840801497950565]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37088024613631,39.83928857722225]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37254914190305,39.842049357352295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p15","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0015","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1940.3 -0.0,-0.0 13.7,0.0 1653.8,0.0 1668.2,1900.2 259.1,1899.7 -0.0,1940.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1115.0,1057.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3700085,39.8459681]}},{"type":"Feature","properties":{"resourceCoords":[564.0,87.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3721257,39.8471351]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0016","type":"ImageService3","width":1688,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1413.7,0.0 1439.8,1764.4 1238.0,1761.0 1231.2,1938.7 135.1,1914.0 146.6,20.6 1413.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3702287859346,39.84801272737296]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36668277273046,39.84933171276922]}},{"type":"Feature","properties":{"resourceCoords":[1688.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36468274689298,39.84611737557872]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36822876009713,39.84479839018246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p17","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0017","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.5,0.0 1689.0,0.0 1689.0,1093.3 1451.0,1092.7 1495.6,1775.3 779.0,1749.7 779.6,1934.3 -0.0,1928.4 -0.0,-0.0 54.5,0.7 54.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[771.0,510.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3651193,39.8489122]}},{"type":"Feature","properties":{"resourceCoords":[76.0,1929.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3650839,39.846062]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0018","type":"ImageService3","width":1686,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1086.3 240.5,1104.0 312.7,3.0 1459.4,0.0 1456.3,36.8 1686.0,44.1 1686.0,213.7 1503.6,540.0 1596.9,545.4 1646.7,1894.8 -0.0,1933.3 -0.0,1086.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36435578903077,39.850197213774905]}},{"type":"Feature","properties":{"resourceCoords":[1686.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36099426454506,39.85173148053401]}},{"type":"Feature","properties":{"resourceCoords":[1686.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35866497364252,39.84868084817759]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36202649812823,39.84714658141848]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0019","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"11.6,1792.2 17.3,195.6 1656.5,210.6 1651.6,1806.7 11.6,1792.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36941698682737,39.844900814596635]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36583149651341,39.846194297220364]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36386673944347,39.8429382396855]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36745222975743,39.84164475706177]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0002","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1132.6,210.1 1133.3,102.4 1669.3,107.2 1657.7,1872.0 1638.3,1872.2 1631.5,1979.0 -0.0,1979.0 -0.0,1328.5 126.1,1331.6 126.1,1331.6 163.1,93.8 570.1,97.4 569.6,203.8 1132.6,210.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39513024892955,39.83105652343592]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39182430840043,39.83281614800871]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38915518998613,39.829816925845925]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39246113051524,39.828057301273134]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p20","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0020","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"316.2,1792.0 326.5,0.0 528.8,0.0 534.0,169.2 1320.5,151.0 1420.5,1164.9 1419.9,1650.8 935.9,1641.0 316.2,1792.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[316.0,1219.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3646762,39.8441347]}},{"type":"Feature","properties":{"resourceCoords":[1320.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3636005,39.8466226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0021","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1349.0,1979.0 375.9,1979.0 370.1,1209.1 278.4,554.6 250.0,0.0 982.6,0.0 999.4,156.8 1687.0,66.9 1687.0,98.0 1496.5,129.1 1371.5,844.8 1390.1,1111.8 1275.1,1145.3 1349.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36431913448337,39.84673609580679]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36079151220179,39.84797582340955]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35891058962116,39.844776200106985]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36243821190274,39.843536472504226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0022","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.8,1063.1 131.6,794.1 340.4,93.6 534.5,84.9 538.1,53.8 1286.5,51.1 1489.0,1942.0 1687.0,1920.8 1687.0,1979.0 1028.6,1979.0 1035.0,1919.2 -0.0,1788.0 -0.0,1083.0 118.8,1063.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36184309325819,39.8474577617637]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35854656346541,39.84899785852585]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35620988420902,39.846007885068865]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3595064140018,39.844467788306716]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0024__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p24 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6748.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0024__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0024","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,183.6 -0.0,1979.0 845.9,1979.0 846.3,954.2 1687.0,960.0 1687.0,576.0 1687.0,349.0 1687.0,203.0 1639.3,201.0 1639.3,199.9 -0.0,183.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0024__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":[-75.38624865401096,39.831709196749266]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38298409600397,39.83344504180525]}},{"type":"Feature","properties":{"resourceCoords":[1687.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38032903987464,39.83050791252231]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38359359788163,39.828772067466325]}},{"type":"Feature","properties":{"resourceCoords":[1641.0,94.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.382947,39.8332582]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p26","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0026","type":"ImageService3","width":1690,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,216.5 65.0,216.6 65.6,0.0 581.5,0.0 576.8,216.6 1690.0,207.7 1690.0,1979.0 -0.0,1979.0 -0.0,216.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[65.0,652.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3790009,39.8340875]}},{"type":"Feature","properties":{"resourceCoords":[65.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3797612,39.8349432]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p27","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0027","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.5,109.1 1610.0,247.3 1660.7,248.9 1684.0,110.4 1684.0,1979.0 137.2,1979.0 159.2,203.0 1105.5,231.9 1106.2,100.9 1612.5,109.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1103.0,678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.373803,39.8367898]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.37282,39.8373186]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p28","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0028","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1979.0 0.0,0.0 1684.0,0.0 1684.0,1979.0 0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[80.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.37282,39.8373186]}},{"type":"Feature","properties":{"resourceCoords":[1117.0,123.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3715694,39.8392302]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p29","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0029","type":"ImageService3","width":1680,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1979.0 0.0,0.0 1680.0,0.0 1680.0,1979.0 0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37027134145815,39.840163291906876]}},{"type":"Feature","properties":{"resourceCoords":[1680.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36669395368294,39.84145839624258]}},{"type":"Feature","properties":{"resourceCoords":[1680.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36470477723695,39.838226402637815]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36828216501216,39.83693129830211]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,99.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3671055,39.8411117]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0003","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1639.4,86.5 1637.9,1322.2 1600.2,1322.2 1598.1,1971.0 -0.0,1979.0 25.4,88.6 1639.4,86.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39188313433377,39.83274407504868]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38856220860168,39.834484699673915]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38591557196217,39.83146479438555]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38923649769426,39.82972416976032]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p30","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0030","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1684.0,167.6 1684.0,1979.0 -0.0,1979.0 -0.0,656.2 33.8,656.5 41.3,149.4 1684.0,167.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[41.0,394.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3673611,39.841554]}},{"type":"Feature","properties":{"resourceCoords":[1646.0,668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3636014,39.8423711]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0031","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1348.0 -0.0,857.0 280.5,851.4 267.4,-0.0 1684.0,-0.0 1684.0,1879.5 164.4,1934.8 -0.0,1348.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36011961186364,39.84487215281492]}},{"type":"Feature","properties":{"resourceCoords":[1684.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.358575732366,39.842135054791356]}},{"type":"Feature","properties":{"resourceCoords":[1684.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36273569583555,39.84073217115943]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36427957533319,39.843469269183]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0032","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1684.0,-0.0 1684.0,1979.0 61.1,1979.0 100.6,-0.0 1684.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35760634770531,39.84558857436476]}},{"type":"Feature","properties":{"resourceCoords":[1684.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35674077781685,39.844156324195474]}},{"type":"Feature","properties":{"resourceCoords":[1684.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35891762363092,39.84336982050096]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35978319351938,39.84480207067025]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p33","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0033","type":"ImageService3","width":1684,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1870.5 -0.0,-0.0 1462.7,0.0 1546.0,547.7 1546.0,1867.0 995.8,1868.2 995.7,1979.0 417.8,1979.0 417.8,1869.5 -0.0,1870.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1546.0,666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.393278,39.8344094]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,1867.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3917145,39.8326352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p34 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6756.0"},{"label":"split_canvas_h","value":"3990.8"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"599.7,919.1 607.4,889.7 1689.0,922.5 1689.0,0.0 -0.0,-0.0 -0.0,123.4 549.5,86.8 599.7,919.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[753.0,343.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3605007,39.8635141]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,911.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3592267,39.8628595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p34 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3912.4"},{"label":"split_canvas_w","value":"3408.0"},{"label":"split_canvas_h","value":"4003.6"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1979.0 705.0,1979.0 800.8,1979.0 847.0,1838.1 852.0,988.0 0.0,978.1 -0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,978.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3629021743586,39.86297723702329]}},{"type":"Feature","properties":{"resourceCoords":[852.0,978.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3612056464708,39.863759824353814]}},{"type":"Feature","properties":{"resourceCoords":[852.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36001617994293,39.862219080102854]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36171270783073,39.861436492772334]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p34 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"3384.4"},{"label":"split_canvas_y","value":"3952.0"},{"label":"split_canvas_w","value":"3371.6"},{"label":"split_canvas_h","value":"3964.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1000.0,1979.0 1689.0,1979.0 1689.0,1333.7 1536.8,1329.7 1557.1,996.2 852.0,988.0 846.1,1979.0 1000.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0034__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[846.1,988.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36764081528389,39.8579503185801]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,988.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3660125483521,39.85871105437996]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.364854556213,39.85722982594284]}},{"type":"Feature","properties":{"resourceCoords":[846.1,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36648282314479,39.85646909014299]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0035","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1624.2,235.4 1605.2,992.5 1395.7,984.7 1389.3,1107.2 1689.0,1121.0 1689.0,1979.0 1216.3,1979.0 1205.8,1698.3 575.4,1721.9 577.0,1870.5 242.3,1862.8 246.7,1979.0 -0.0,1979.0 -0.0,38.1 588.0,59.9 1624.2,235.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36277373968154,39.8605845199715]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36088123423308,39.857946062005]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36488030743891,39.85623186688946]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36677281288739,39.858870324855964]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p36","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0036","type":"ImageService3","width":1691,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 122.3,0.0 124.2,210.0 879.2,189.9 856.9,310.0 1259.8,306.6 1417.2,134.2 1408.7,1446.3 884.8,1443.4 884.0,1523.7 497.6,1520.0 430.9,1714.5 -0.0,1517.2 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[881.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3597225,39.855189]}},{"type":"Feature","properties":{"resourceCoords":[1568.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3593,39.8573002]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0037","type":"ImageService3","width":1696,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1253.7,0.0 1231.2,1298.5 1084.6,1296.4 1039.1,1343.4 1069.5,1296.2 612.5,1289.5 607.8,1806.6 448.1,1979.0 40.4,1979.0 195.0,806.0 191.3,212.4 -0.0,220.7 0.0,0.0 1253.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36346010566152,39.860736629733736]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35998498942995,39.86207767385027]}},{"type":"Feature","properties":{"resourceCoords":[1696.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3579607309444,39.85894304357264]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.36143584717597,39.8576019994561]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p38","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0038","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"414.8,360.1 459.0,165.3 1578.5,163.7 1573.3,0.0 1685.0,0.0 1685.0,1830.2 1472.7,1859.1 1101.8,1816.3 1102.0,1847.5 945.7,1848.2 945.8,1979.0 245.1,1979.0 245.7,1842.7 277.0,1820.2 -0.0,1887.4 -0.0,1508.7 -0.0,1492.1 -0.0,401.0 414.8,360.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[936.0,715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3586966,39.8620018]}},{"type":"Feature","properties":{"resourceCoords":[936.0,173.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3592267,39.8628595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p39","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0039","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1532.1,98.5 1685.0,86.7 1685.0,1241.7 1530.1,1241.5 1526.2,1813.8 -0.0,1815.1 0.0,0.0 449.1,0.0 419.7,47.0 464.0,0.0 608.1,0.0 607.0,129.4 847.7,87.7 846.0,221.0 1531.2,226.5 1532.1,98.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[849.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3578399,39.8578392]}},{"type":"Feature","properties":{"resourceCoords":[1529.0,550.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3571157,39.8594857]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0004","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"37.6,1331.8 35.1,99.3 1.4,99.4 0.8,-0.0 1644.8,0.0 1657.1,1979.0 -0.0,1979.0 -0.0,1331.9 37.6,1331.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3887346990663,39.83442366525541]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38539770931865,39.8361604619507]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38275682798856,39.833126023543784]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38609381773621,39.83138922684849]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p40","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0040","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"469.5,1250.8 467.7,66.6 833.5,111.6 1043.1,84.5 1043.7,0.0 1685.0,0.0 1685.0,1969.6 1543.3,1979.0 1542.1,1582.7 850.4,1580.5 849.3,1826.4 310.2,1828.5 313.2,1250.8 469.5,1250.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[311.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3571157,39.8594857]}},{"type":"Feature","properties":{"resourceCoords":[1541.0,1248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3538559,39.8593232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0041__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p41 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6732.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0041__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0041","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 -0.0,1906.0 138.6,1898.2 230.8,1979.0 1569.0,1979.0 1568.0,0.0 1179.8,0.0 1114.7,195.9 679.9,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0041__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1568.0,755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3592971,39.8545097]}},{"type":"Feature","properties":{"resourceCoords":[1568.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3581481,39.8526753]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p42","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0042","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"136.2,1790.2 151.1,311.6 1531.0,320.6 1518.8,1801.2 136.2,1790.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[833.0,1150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3578584,39.8550447]}},{"type":"Feature","properties":{"resourceCoords":[147.0,721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3597225,39.855189]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p43","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0043","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.8,251.2 1477.8,247.4 1479.0,3.5 1683.0,4.1 1683.0,1721.5 1623.7,1721.6 1627.3,1768.5 1503.8,1975.7 1433.5,1975.4 1242.1,1859.4 1306.8,1720.8 266.0,1722.0 264.8,251.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[939.0,1079.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3550049,39.8561057]}},{"type":"Feature","properties":{"resourceCoords":[266.0,1722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3557671,39.8545461]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p44","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0044","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"968.7,394.4 1109.7,384.7 1108.5,0.0 1689.0,0.0 1689.0,1717.7 487.6,1723.4 482.6,0.0 966.2,0.0 968.7,394.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[973.0,1070.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3524302,39.857073]}},{"type":"Feature","properties":{"resourceCoords":[973.0,1720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3517784,39.8560274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0045","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.4,263.0 118.0,182.9 1447.0,95.5 1545.4,1257.5 1636.3,1580.4 349.9,1940.2 93.4,609.1 -0.0,618.0 130.4,263.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.361250672978,39.851756448350045]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35764166600133,39.85287004873864]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35594997692506,39.84959295904255]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35955898390174,39.84847935865396]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p46","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0046","type":"ImageService3","width":1681,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1529.9,128.4 1515.0,1725.9 1276.8,1772.7 1314.0,1962.5 837.4,1979.0 835.0,1702.4 137.2,1702.5 143.7,115.6 1529.9,128.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[841.0,122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3571996,39.8540144]}},{"type":"Feature","properties":{"resourceCoords":[1279.0,1774.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3546003,39.8517338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p47","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"25"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0047/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0047","type":"ImageService3","width":1681,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.4,206.6 1185.8,146.0 1128.9,288.2 1581.5,528.4 1158.6,1335.2 1417.0,1473.1 237.2,1788.6 145.4,206.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0047/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1159.0,1335.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3525824,39.8533744]}},{"type":"Feature","properties":{"resourceCoords":[1582.0,528.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3523905,39.8549959]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p48","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0048","type":"ImageService3","width":1677,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"301.2,491.8 430.7,247.2 424.8,200.7 1677.0,137.3 1677.0,1643.8 627.0,1701.8 608.2,1702.8 72.4,1399.8 500.4,599.5 301.2,491.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[500.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3523905,39.8549959]}},{"type":"Feature","properties":{"resourceCoords":[51.0,357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3535783,39.8550833]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0049","type":"ImageService3","width":1680,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,82.3 1569.0,93.1 1586.7,744.4 1680.0,708.4 1680.0,1979.0 -0.0,1979.0 -0.0,82.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35938278927841,39.84867100212957]}},{"type":"Feature","properties":{"resourceCoords":[1680.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35632167749058,39.850470960549224]}},{"type":"Feature","properties":{"resourceCoords":[1680.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35357929374779,39.84768300104191]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.35664040553561,39.845883042622255]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0005","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.6,1979.0 19.3,82.2 1650.1,81.9 1654.8,1979.0 28.6,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38549010875712,39.83607809564433]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38217758298204,39.83780718496833]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37954835802665,39.83479506471503]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38286088380174,39.83306597539104]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0050__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p50 [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":"6748.0"},{"label":"split_canvas_h","value":"4690.8"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0050__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0050","type":"ImageService3","width":1687,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"889.9,47.4 688.2,0.0 187.3,0.0 143.9,1031.5 247.2,996.1 239.4,1172.5 1483.7,1172.7 1526.2,455.6 829.1,316.9 889.9,47.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0050__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[164.0,380.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.356395,39.8502208]}},{"type":"Feature","properties":{"resourceCoords":[1486.0,869.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.353318,39.8510472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p51","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0051","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1453.7,0.0 1683.0,214.3 1683.0,1979.0 -0.0,1979.0 -0.0,945.0 213.3,937.0 197.4,335.8 228.9,227.6 -0.0,190.8 0.0,0.0 1453.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3546063,39.8517342]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3514774,39.8535737]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.34866,39.850749099999994]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3517889,39.8489096]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p52 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3844.8"},{"label":"split_canvas_w","value":"6740.0"},{"label":"split_canvas_h","value":"4071.2"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,961.2 -0.0,1723.7 1685.0,1735.9 1685.0,961.2 -0.0,961.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[517.0,1054.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3858384,39.8382996]}},{"type":"Feature","properties":{"resourceCoords":[1609.0,1054.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3837101,39.8394238]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p52 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6740.0"},{"label":"split_canvas_h","value":"3844.8"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052","type":"ImageService3","width":1685,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"672.3,961.2 1685.0,961.2 1685.0,0.0 479.6,0.0 672.3,961.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0052__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[731.0,445.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3501614,39.8527267]}},{"type":"Feature","properties":{"resourceCoords":[189.0,445.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3513062,39.852296]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0053__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p53 [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":"6756.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0053__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0053","type":"ImageService3","width":1689,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1979.0 481.0,1979.0 766.0,1979.0 841.6,1979.0 834.4,1004.4 1689.0,1001.8 1689.0,-0.0 -0.0,0.0 -0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0053__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":[-75.34147162931916,39.8542714238408]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.33968631014645,39.85154578105679]}},{"type":"Feature","properties":{"resourceCoords":[1689.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3438503715076,39.84994142789215]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.34563569068031,39.852667070676155]}},{"type":"Feature","properties":{"resourceCoords":[71.0,126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3416617,39.8540547]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0054","type":"ImageService3","width":1681,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.1,544.5 0.0,-0.0 1681.0,0.0 1681.0,1845.8 76.7,1843.3 77.1,544.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39430181198237,39.83532205590566]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39104082673381,39.83704168893714]}},{"type":"Feature","properties":{"resourceCoords":[1681.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.388422897572,39.83407287566032]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.39168388282056,39.832353242628834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0006","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1641.7,92.3 1649.7,1316.8 1560.2,1317.5 1554.9,1963.5 569.6,1979.0 572.2,1756.9 42.0,1758.8 35.5,92.1 1641.7,92.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.38232633992774,39.83775319370413]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37899508025932,39.83948527412083]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37636124305439,39.836456192564114]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.37969250272282,39.83472411214741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p7 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6732.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0007","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1042.1,1764.7 1042.1,1711.9 1499.4,1704.5 1499.7,1654.5 1565.6,1654.2 1573.1,0.0 784.8,0.0 794.0,1157.5 0.0,1165.7 -0.0,1762.0 1042.1,1764.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1045.0,578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3811601,39.8418031]}},{"type":"Feature","properties":{"resourceCoords":[1571.0,578.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3801531,39.8423294]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p8","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0008","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"63.0,7.5 1683.0,0.0 1683.0,1979.0 1578.7,1979.0 1577.0,1811.6 1331.0,1816.0 1333.7,1979.0 66.7,1979.0 65.0,1677.6 -0.0,1679.0 -0.0,1630.0 64.6,1629.4 63.0,7.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3810355,39.8431287]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3777367,39.8448321]}},{"type":"Feature","properties":{"resourceCoords":[1683.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.375128,39.841853799999996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.3784268,39.8401504]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p9 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2742.0"},{"label":"split_canvas_w","value":"6732.0"},{"label":"split_canvas_h","value":"5174.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1596.2,1560.4 1683.0,1561.8 1683.0,1010.4 579.9,986.2 584.8,685.5 72.2,685.5 52.0,1769.2 1591.0,1801.1 1596.2,1560.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[62.0,1238.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.378954,39.8393014]}},{"type":"Feature","properties":{"resourceCoords":[1591.0,1801.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3752293,39.8400657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chester, Pennsylvania | 1898 | sanborn07578_003 p9 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6732.0"},{"label":"split_canvas_h","value":"2742.0"}],"created":"2026-09-22T06:17:01Z","modified":"2026-09-22T06:17:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009","type":"ImageService3","width":1683,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 -0.0,685.5 1610.0,685.5 1618.2,0.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824cm:g3824cm_g075781898:07578_1898-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1104.0,98.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3984263,39.8279466]}},{"type":"Feature","properties":{"resourceCoords":[1617.0,98.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3973798,39.828492]}}]}}]}