{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07494_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Allentown, Pennsylvania | 1932 | mapsnap generated fit (2026-09-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-20"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"119"},{"label":"placed","value":"91"},{"label":"unplaced","value":"28"},{"label":"fit sources","value":"georef 76, georef-snap 22, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"10 sheet(s) cut into 27 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 40.60344,-75.47082 +/-4744m); p14__2 (tier 1, 40.61767,-75.46812 +/-190m); p14__3 (tier 2, 40.60560,-75.46006 +/-100m); p15__2 (tier 1, 40.60598,-75.45644 +/-112m); p18__2 (tier 1, 40.59746,-75.49974 +/-144m); p216__1 (tier 4, 40.60344,-75.47082 +/-4744m); p216__2 (tier 4, 40.60344,-75.47082 +/-4744m); p216__3 (tier 4, 40.60344,-75.47082 +/-4744m); p216__4 (tier 4, 40.60344,-75.47082 +/-4744m); p216__5 (tier 4, 40.60344,-75.47082 +/-4744m); p216__6 (tier 4, 40.60344,-75.47082 +/-4744m); p216__7 (tier 4, 40.60344,-75.47082 +/-4744m); p217 (tier 1, 40.60090,-75.48277 +/-486m); p219__2 (tier 1, 40.57841,-75.48069 +/-156m); p222__1 (tier 1, 40.59850,-75.46954 +/-190m); p226 (tier 1, 40.58071,-75.45460 +/-512m); p228 (tier 1, 40.57795,-75.44930 +/-510m); p237__1 (tier 1, 40.60994,-75.45096 +/-502m); p2__1 (tier 2, 40.59761,-75.48196 +/-2283m); p31 (tier 1, 40.59487,-75.50391 +/-511m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p1","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"23"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0001","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1119.8 -0.0,799.1 117.9,753.1 177.2,628.4 182.0,65.8 1450.0,81.2 1449.3,217.6 1641.0,221.6 1641.0,1933.1 939.4,1648.3 -0.0,1119.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1448.0,491.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4716088,40.5998602]}},{"type":"Feature","properties":{"resourceCoords":[179.0,566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4743664,40.5989366]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p10","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"25"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0010","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"385.0,985.4 513.6,146.7 1413.3,139.1 1434.1,1942.7 163.4,1949.0 145.1,989.5 385.0,985.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1429.0,1397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4694038,40.6020294]}},{"type":"Feature","properties":{"resourceCoords":[565.0,146.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4723467,40.603661]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p11","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"32"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0011","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1442.1,1802.3 196.3,1811.8 188.6,143.9 1437.2,138.1 1442.1,1802.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1019.0,1392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4675548,40.6025515]}},{"type":"Feature","properties":{"resourceCoords":[593.0,548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4691951,40.6037365]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p12","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"21"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0012","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"139.2,159.9 973.8,144.8 978.5,1710.8 838.8,1714.3 840.2,1811.1 165.6,1830.6 139.2,159.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[539.0,1608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4655996,40.6027079]}},{"type":"Feature","properties":{"resourceCoords":[819.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.466096,40.6053738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p13","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0013","type":"ImageService3","width":1646,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1450.0,1045.0 1454.3,1949.0 -0.0,1949.0 -0.0,247.2 1261.0,225.2 1285.9,1055.9 1450.0,1045.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1450.0,1359.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4616303,40.6044295]}},{"type":"Feature","properties":{"resourceCoords":[1450.0,1045.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4618741,40.6049648]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p14 [1]","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":"6584.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0014__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0014","type":"ImageService3","width":1646,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1301.0,230.0 206.9,228.8 218.0,1062.0 382.6,1053.8 374.1,1734.5 1301.4,1736.8 1301.0,230.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.0,230.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.461709,40.606588]}},{"type":"Feature","properties":{"resourceCoords":[1301.0,230.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4604976,40.6069232]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p15 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6584.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0015","type":"ImageService3","width":1646,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"877.2,1492.7 1401.4,1155.2 1646.0,1173.9 1646.0,1046.4 1332.5,923.0 1470.6,264.8 1445.8,186.0 1344.8,127.7 144.5,128.6 156.7,1759.3 877.2,1492.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[147.0,1621.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4592736,40.6043764]}},{"type":"Feature","properties":{"resourceCoords":[578.0,128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.459523,40.6071928]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p16","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0016","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"746.1,1949.0 674.5,1949.0 258.8,1270.5 542.6,1103.5 485.8,1008.2 875.7,771.3 915.6,827.5 1152.4,528.2 1287.5,249.5 1396.2,194.2 1363.2,140.2 1502.4,122.3 1632.0,75.3 1632.0,1949.0 1328.6,1949.0 1329.0,1899.5 1181.4,1673.8 746.1,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[486.0,1008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4613403,40.6038088]}},{"type":"Feature","properties":{"resourceCoords":[612.0,1224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4609494,40.602946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p17","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"37"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0017","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1658.0 14.8,140.7 1510.5,135.0 1505.0,1788.0 92.2,1789.9 93.5,1658.0 -0.0,1658.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[811.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.48625,40.600303]}},{"type":"Feature","properties":{"resourceCoords":[565.0,385.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4877325,40.6021049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p18 [1]","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"50"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0018","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"931.5,1778.3 931.6,1722.7 956.0,1722.8 1523.0,1724.1 1527.1,960.5 1413.4,957.9 1415.0,142.0 1628.0,143.0 1628.0,0.0 1360.7,0.0 1358.0,141.7 72.0,135.4 65.0,1780.2 931.5,1778.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[758.0,1779.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.482958,40.6007429]}},{"type":"Feature","properties":{"resourceCoords":[1415.0,142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4828235,40.6039279]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p19","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"55"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0019","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"260.5,960.4 146.5,957.0 153.6,138.8 367.1,141.2 368.1,0.0 1029.0,0.0 1027.8,148.8 1460.3,153.7 1442.9,1382.7 1631.5,1383.5 1632.0,1792.8 250.7,1779.4 260.5,960.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[149.0,377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4826365,40.6035229]}},{"type":"Feature","properties":{"resourceCoords":[1049.0,1195.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4799587,40.6027074]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p20","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"17"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0020","type":"ImageService3","width":1636,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"246.9,1401.8 244.2,167.0 1352.2,153.2 1359.8,1805.4 443.6,1810.6 430.1,986.8 428.9,986.8 436.4,1399.5 246.9,1401.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1120.0,379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4777886,40.6048886]}},{"type":"Feature","properties":{"resourceCoords":[247.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4795782,40.6040356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0201/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p201","metadata":[{"label":"streets","value":"20"},{"label":"intersections","value":"52"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0201/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0201","type":"ImageService3","width":1601,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1392.9,26.5 1414.5,26.5 1400.8,1893.0 67.0,1887.5 67.0,1888.9 -0.0,1887.9 0.0,0.0 1392.9,0.0 1392.9,26.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0201/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[887.0,611.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.50782,40.60812]}},{"type":"Feature","properties":{"resourceCoords":[539.0,1304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.508241,40.605314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0202/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p202","metadata":[{"label":"streets","value":"24"},{"label":"intersections","value":"87"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0202/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0202","type":"ImageService3","width":1592,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1344.7,46.5 1344.7,0.0 1592.0,0.0 1588.5,983.2 1466.9,983.8 1467.5,1687.5 1262.3,1687.9 1274.7,1922.1 1465.2,1921.4 1465.2,1949.0 -0.0,1949.0 -0.0,52.4 999.7,48.4 999.2,0.0 1118.9,0.0 1118.9,47.8 1344.7,46.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0202/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1000.0,987.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.500407,40.608815]}},{"type":"Feature","properties":{"resourceCoords":[64.0,753.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.504993,40.608467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0203/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p203","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"42"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0203/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0203","type":"ImageService3","width":1604,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.0,21.5 90.2,0.0 326.4,0.0 325.6,98.4 559.5,99.2 560.1,0.0 1436.5,0.0 1408.9,1786.7 1408.9,1786.7 1406.9,1949.0 196.3,1949.0 208.5,21.7 90.0,21.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0203/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1147.0,635.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.515148,40.596123]}},{"type":"Feature","properties":{"resourceCoords":[83.0,921.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.519414,40.593838]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p204","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"44"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0204","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.2,0.0 1394.5,0.0 1394.9,77.9 1113.0,76.7 1112.7,160.9 1231.0,159.8 1230.4,402.4 1114.4,401.3 1116.2,553.1 1229.9,554.3 1231.3,1048.1 1108.9,1048.2 1105.4,1862.4 1081.6,1862.5 1082.3,1740.0 589.3,1735.7 590.0,1862.7 61.5,1863.1 62.1,1745.7 -0.0,1745.7 -0.0,672.3 156.5,672.2 159.2,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0204/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,672.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.511907,40.6005178]}},{"type":"Feature","properties":{"resourceCoords":[764.0,279.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5125489,40.6018616]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p205","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0205/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0205","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1111.2,175.8 1475.0,0.0 1596.7,0.0 1597.9,172.2 1485.0,943.5 1371.2,944.4 1373.6,1615.9 1349.6,1615.8 1344.6,944.6 1013.4,947.2 306.8,830.5 306.5,698.5 1111.2,175.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0205/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.50997868596596,40.603275668850046]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.50282420438242,40.60520144048531]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.49975431100505,40.59853358137786]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.50690879258859,40.59660780974259]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p206","metadata":[{"label":"streets","value":"20"},{"label":"intersections","value":"45"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0206/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0206","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1798.2 -0.0,975.6 113.7,974.6 110.3,324.0 -0.0,324.7 -0.0,201.2 43.5,200.8 43.6,223.4 1517.7,216.3 1529.4,1784.9 -0.0,1798.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0206/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[704.0,848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.499406,40.602976]}},{"type":"Feature","properties":{"resourceCoords":[816.0,318.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4997433,40.6049122]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0207/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p207","metadata":[{"label":"streets","value":"22"},{"label":"intersections","value":"37"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0207/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0207","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,15.4 74.8,14.8 75.2,133.3 608.5,128.2 606.3,0.0 1104.2,0.0 1104.7,123.6 1599.0,119.5 1599.0,533.0 1419.6,576.7 1418.8,858.8 1599.0,906.6 1599.0,1181.7 1417.9,1183.4 1417.0,1495.5 1495.2,1494.7 1494.3,1360.2 1599.0,1359.2 1599.0,1673.8 860.2,1785.6 557.2,1890.3 556.5,1787.9 87.0,1790.9 86.1,1679.0 36.5,1679.5 39.1,1949.0 -0.0,1949.0 -0.0,15.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0207/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[675.0,1666.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5080199,40.5910835]}},{"type":"Feature","properties":{"resourceCoords":[1259.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5056725,40.5923581]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0208/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p208","metadata":[{"label":"streets","value":"25"},{"label":"intersections","value":"78"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0208/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0208","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,0.0 49.6,0.0 49.4,111.8 518.8,113.6 518.5,215.9 822.4,114.3 1377.7,31.6 1377.2,322.0 1458.5,322.3 1456.3,990.1 1575.3,990.3 1575.3,900.2 1599.0,900.2 1599.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0208/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[752.0,780.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.506235,40.588557]}},{"type":"Feature","properties":{"resourceCoords":[1457.0,780.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5030895,40.5894264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p209","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"22"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0209/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0209","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.9,1531.5 -0.0,1532.5 -0.0,1221.5 180.4,1219.3 179.7,945.2 -0.0,900.4 -0.0,614.4 182.8,572.4 177.5,160.9 1331.2,147.3 1330.2,0.0 1354.1,0.0 1354.6,147.1 1472.9,145.7 1473.5,554.5 1599.0,552.8 1599.0,962.8 1422.9,965.5 1432.7,1949.0 1260.6,1949.0 1257.2,1802.1 80.6,1816.4 79.7,1719.2 200.5,1708.0 181.8,1699.8 180.9,1396.2 76.6,1397.5 77.9,1531.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0209/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[710.0,155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.503939,40.5981039]}},{"type":"Feature","properties":{"resourceCoords":[1017.0,1805.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4999656,40.5928363]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p21","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"35"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0021","type":"ImageService3","width":1636,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.4,1776.8 184.8,133.8 1438.5,138.2 1444.2,1780.2 175.4,1776.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1267.0,317.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.474886,40.6057681]}},{"type":"Feature","properties":{"resourceCoords":[1017.0,1778.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4742536,40.6031391]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0210/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p210","metadata":[{"label":"streets","value":"25"},{"label":"intersections","value":"61"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0210/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0210","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.6,1681.8 -0.0,971.2 175.8,969.9 179.2,560.5 53.9,561.1 56.6,153.0 1599.0,147.2 1599.0,1798.3 939.6,1797.0 170.0,1685.7 0.6,1681.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0210/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[995.0,1596.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.493985,40.595274]}},{"type":"Feature","properties":{"resourceCoords":[56.0,971.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4992088,40.5962563]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0211/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p211","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"38"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0211/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0211","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,45.4 81.8,32.0 1262.0,128.6 1436.3,278.0 1441.8,1813.8 1437.5,1949.0 -0.0,1949.0 -0.0,45.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0211/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[429.0,1129.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.50099,40.588718]}},{"type":"Feature","properties":{"resourceCoords":[1022.0,338.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4996227,40.5921282]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0212/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p212","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"19"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0212/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0212","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.0,1540.3 1602.0,1949.0 -0.0,1949.0 0.0,0.0 137.1,0.0 943.2,119.5 1469.1,123.1 1465.4,1122.4 1260.2,1122.8 1262.5,1593.4 1602.0,1540.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0212/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[762.0,453.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.494178,40.593168]}},{"type":"Feature","properties":{"resourceCoords":[1468.0,453.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.491028,40.594037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0213/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p213","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"46"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0213/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0213","type":"ImageService3","width":1599,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1599.0,0.0 1599.0,1466.1 1441.3,1466.8 1442.5,1744.6 568.8,1751.6 568.9,1850.5 335.9,1851.5 335.8,1753.5 100.3,1755.3 100.4,1776.8 44.8,1777.1 -0.0,1824.7 -0.0,0.0 1599.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0213/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[801.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5188403,40.6001216]}},{"type":"Feature","properties":{"resourceCoords":[1508.0,1846.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5144411,40.5983619]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p214","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"39"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0214/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0214","type":"ImageService3","width":1593,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1593.0,0.0 1593.0,1787.0 1371.0,1785.4 1370.7,1832.0 1144.2,1831.7 1144.5,1783.8 1024.5,1782.9 1024.6,1831.4 -0.0,1828.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0214/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,1121.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5051704,40.6138498]}},{"type":"Feature","properties":{"resourceCoords":[1499.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.501346,40.615802]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0215/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p215","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0215/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0215","type":"ImageService3","width":1597,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1379.4,0.0 1379.3,46.8 1424.0,0.0 1597.0,0.0 1597.0,1949.0 -0.0,1949.0 0.0,-0.0 1379.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0215/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.5274837824238,40.595046334849194]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.52032402911762,40.59703090491398]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.51715683053432,40.59034895760997]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.5243165838405,40.588364387545184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0218/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p218","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"11"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0218/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0218","type":"ImageService3","width":1588,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"471.8,353.2 467.3,0.0 918.1,0.0 919.6,316.7 1588.0,313.5 1588.0,553.6 1463.5,551.8 1483.9,1799.8 1470.7,1800.0 1461.5,1873.9 1348.8,1851.0 1350.0,1949.0 941.3,1949.0 939.5,1838.2 379.5,1854.7 379.0,1777.3 -0.0,1899.4 10.2,153.0 471.8,353.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0218/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1347.0,1691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4639504,40.5940814]}},{"type":"Feature","properties":{"resourceCoords":[663.0,1691.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4669993,40.5932525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0219__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p219 [1]","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"35"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6420.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0219__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0219","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.4,1835.2 -0.0,1901.8 -0.0,1949.0 140.5,1949.0 267.0,1949.0 268.2,1779.8 986.4,1452.9 985.8,1329.3 1381.7,1331.5 1382.0,1216.9 1484.7,1217.7 1486.5,776.6 1605.0,748.2 1605.0,226.8 1488.7,253.6 1489.2,140.9 1260.2,166.9 1261.3,324.9 1114.1,324.7 1116.5,172.1 999.5,176.3 999.8,366.3 696.0,436.4 680.8,370.7 -0.0,521.6 0.0,1208.2 0.0,1554.0 0.0,1660.0 -0.0,1675.3 146.4,1835.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0219__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1261.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4749333,40.5905966]}},{"type":"Feature","properties":{"resourceCoords":[514.0,663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4785909,40.5910979]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p22","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"26"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0022","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1441.7,1799.5 157.3,1818.5 118.8,174.5 1411.4,144.7 1441.7,1799.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[570.0,987.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4730124,40.6050565]}},{"type":"Feature","properties":{"resourceCoords":[1214.0,1804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4709398,40.6040408]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p220","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0220/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0220","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"257.7,0.0 209.9,200.5 315.7,389.6 157.6,419.8 146.7,465.4 406.9,528.0 447.2,364.4 1222.6,216.1 1250.5,96.3 1395.4,132.2 1397.0,759.6 1427.3,786.6 1397.1,819.4 1399.1,1612.2 1605.0,1612.7 1605.0,1949.0 -0.0,1949.0 -0.0,-0.0 257.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0220/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4817183869957,40.58766748700531]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47456733215022,40.589679647024056]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47137246002042,40.58303835238166]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4785235148659,40.58102619236291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0221/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p221","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"32"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0221/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0221","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1090.2 -0.0,458.1 240.9,515.8 267.8,405.2 367.8,430.0 472.6,0.0 1388.9,0.0 1386.7,146.8 1481.1,113.0 1484.6,828.0 1605.0,827.3 1605.0,1112.6 1418.3,1114.0 1423.3,1839.6 1605.0,1838.3 1605.0,1949.0 -0.0,1949.0 -0.0,1150.4 30.3,1117.3 -0.0,1090.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0221/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[642.0,1119.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4713441,40.5875316]}},{"type":"Feature","properties":{"resourceCoords":[642.0,425.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4724812,40.5898774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0222__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p222 [2]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"26"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6420.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0222__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0222","type":"ImageService3","width":1605,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1220.8 0.0,1338.0 0.0,1382.6 743.3,1371.9 745.8,1949.0 1511.0,1949.0 1605.0,1694.1 1605.0,1278.0 1605.0,1275.1 1605.0,628.5 1463.2,629.2 1462.9,173.5 1449.6,173.5 1439.2,247.4 1326.8,222.7 1326.3,320.9 917.0,314.5 917.0,203.4 355.8,211.2 356.5,133.7 69.9,216.8 68.5,934.2 189.3,934.5 179.1,1220.9 -0.0,1220.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0222__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[914.0,651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4648008,40.5915823]}},{"type":"Feature","properties":{"resourceCoords":[492.0,935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4661955,40.5900955]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0223/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p223","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0223/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0223","type":"ImageService3","width":1585,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,244.5 125.2,248.9 129.1,8.6 252.6,10.6 190.9,69.6 496.2,59.2 543.5,0.0 1585.0,0.0 1585.0,284.3 1563.3,316.9 1585.0,330.5 1585.0,1140.9 1461.7,1551.8 1474.8,1593.7 627.8,1844.3 577.3,1949.0 -0.0,1949.0 -0.0,244.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0223/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46565659357604,40.598900023500455]}},{"type":"Feature","properties":{"resourceCoords":[1585.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45868928885636,40.600920522989625]}},{"type":"Feature","properties":{"resourceCoords":[1585.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45544014401224,40.594369341621444]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46240744873192,40.592348842132274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0224/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p224","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"35"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0224/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0224","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"281.5,448.0 707.7,445.9 757.1,342.5 1561.0,99.9 1514.2,271.0 1576.5,477.5 1442.4,519.5 1292.0,1082.8 1273.0,1088.9 1282.2,1118.8 1202.5,1409.8 1233.8,1417.8 1127.7,1810.7 796.0,1722.4 713.7,1949.0 666.3,1949.0 609.4,1909.7 713.2,1627.9 289.6,1473.5 280.9,1497.1 281.5,448.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0224/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1033.0,1786.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.456141,40.588933]}},{"type":"Feature","properties":{"resourceCoords":[623.0,1232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.458921,40.590293]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0225/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p225","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0225/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0225","type":"ImageService3","width":1613,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,453.7 356.3,358.7 383.0,63.7 840.9,103.2 813.7,405.9 924.5,445.0 947.5,173.8 1297.5,172.8 1298.0,874.4 1370.2,967.6 1334.3,822.7 1472.9,785.9 1511.1,904.6 1613.0,904.5 1613.0,1068.2 1580.9,1025.7 1468.5,1101.9 1410.3,1022.6 1298.1,1102.8 1298.5,1611.5 1613.0,1609.3 1613.0,1949.0 -0.0,1949.0 -0.0,453.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0225/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46183393577407,40.58913805850267]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45427396475804,40.58969777602632]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45338965485101,40.582711600589285]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46094962586703,40.582151883065634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0227/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p227","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0227/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0227","type":"ImageService3","width":1603,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 0.0,-0.0 1603.0,0.0 1603.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0227/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4599497527349,40.57638185488444]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45315997442744,40.578872367041036]}},{"type":"Feature","properties":{"resourceCoords":[1603.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44920129629493,40.572557696427516]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4559910746024,40.57006718427092]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0229/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p229","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"35"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0229/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0229","type":"ImageService3","width":1594,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1845.8 -0.0,914.7 115.5,840.5 -0.0,656.5 -0.0,477.8 23.4,462.8 -0.0,426.1 -0.0,-0.0 1594.0,0.0 1594.0,1558.1 1367.6,1557.5 1367.8,1700.5 1504.9,1700.7 1503.8,1844.1 192.7,1843.7 129.1,1744.8 59.5,1745.1 59.4,1844.8 -0.0,1845.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0229/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1101.0,1413.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4509837,40.5923617]}},{"type":"Feature","properties":{"resourceCoords":[382.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.454205,40.590571]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p23","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"31"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0023","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"204.8,1811.7 193.7,23.9 1632.0,0.0 1632.0,163.8 1444.0,163.9 1442.7,1805.0 204.8,1811.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[814.0,166.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4703804,40.6073618]}},{"type":"Feature","properties":{"resourceCoords":[607.0,1397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.46986,40.605134]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0230/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p230","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0230/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0230","type":"ImageService3","width":1597,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"282.5,1364.0 314.6,1406.5 314.7,1242.9 212.9,1243.0 174.8,1124.5 36.3,1161.1 72.1,1305.9 -0.0,1212.7 -0.0,100.5 27.2,100.1 27.7,0.0 98.1,0.0 162.0,99.6 1597.0,107.2 1597.0,396.6 1488.8,396.2 1488.0,252.0 1349.9,250.4 1349.2,701.0 1487.0,681.1 1485.1,923.4 1360.3,922.6 1361.3,1165.7 1484.4,1166.9 1481.4,1289.2 1597.0,1289.5 1597.0,1406.9 1348.1,1405.6 1348.0,1461.5 1597.0,1461.9 1597.0,1949.0 -0.0,1949.0 -0.0,1440.8 112.1,1360.8 170.2,1440.0 282.5,1364.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0230/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45590867057295,40.59080567715248]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44841557668255,40.59136443803241]}},{"type":"Feature","properties":{"resourceCoords":[1597.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44752391195472,40.58437085998838]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45501700584512,40.58381209910846]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0231/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p231","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0231/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0231","type":"ImageService3","width":1602,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"248.6,1894.1 248.4,1776.8 133.0,1776.8 135.8,1654.6 12.8,1653.7 11.4,1410.9 136.1,1411.4 137.6,1169.5 -0.0,1189.6 -0.0,739.7 137.8,741.0 138.9,885.0 246.9,885.3 246.5,596.3 136.9,595.7 138.3,452.0 -0.0,451.4 -0.0,308.1 228.5,309.4 229.2,0.0 1299.4,4.0 1295.1,601.5 1420.4,602.0 1418.8,747.9 1602.0,749.1 1602.0,891.9 1417.1,891.3 1416.7,1172.8 1602.0,1174.7 1602.0,1949.0 -0.0,1949.0 -0.0,1893.0 248.6,1894.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0231/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4497937777894,40.593037905616235]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44226484400318,40.593590100649635]}},{"type":"Feature","properties":{"resourceCoords":[1602.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44138637809084,40.58658523653979]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44891531187706,40.58603304150639]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0232/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p232","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0232/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0232","type":"ImageService3","width":1600,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.3,887.7 309.4,887.0 308.4,744.0 124.9,744.1 125.5,598.0 -0.0,598.4 0.0,-0.0 1600.0,0.0 1600.0,85.0 1330.5,88.4 1333.6,313.1 1571.5,407.9 1335.6,460.2 1341.5,884.1 1404.7,884.0 1404.4,1268.1 1600.0,1265.7 1600.0,1949.0 317.1,1945.7 311.5,1170.2 125.9,1169.7 124.3,887.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0232/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44368524683472,40.593471345125984]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43617195927064,40.593980710427005]}},{"type":"Feature","properties":{"resourceCoords":[1600.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43536061134108,40.58698171114947]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44287389890516,40.58647234584845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p233 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4683.2"},{"label":"split_canvas_w","value":"6424.0"},{"label":"split_canvas_h","value":"3112.8"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1606.0,1949.0 1606.0,1170.8 283.0,1171.4 291.6,1406.5 68.6,1410.9 74.0,1727.2 287.4,1723.7 295.4,1949.0 1606.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1281.0,1727.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.424817,40.591746]}},{"type":"Feature","properties":{"resourceCoords":[74.0,1727.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4304718,40.5914659]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p233 [2]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6424.0"},{"label":"split_canvas_h","value":"4686.0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1590.5,729.2 1381.2,725.1 1378.0,710.6 1387.2,414.4 1606.0,423.2 1606.0,0.0 -0.0,0.0 -0.0,223.0 233.0,319.9 -0.0,368.9 -0.0,789.6 62.3,790.4 56.7,1171.5 1606.0,1170.8 1590.5,729.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0233__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[491.0,795.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.434677,40.590884]}},{"type":"Feature","properties":{"resourceCoords":[65.0,553.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.436823,40.591602]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0234/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p234","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"9"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0234/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0234","type":"ImageService3","width":1606,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1036.0 70.7,1037.9 71.3,1184.1 200.0,1181.7 197.3,835.4 69.8,835.1 76.2,170.3 294.5,188.4 456.6,170.2 817.5,0.0 1262.0,0.0 1264.0,217.2 1606.0,218.4 1606.0,1949.0 -0.0,1949.0 -0.0,1036.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0234/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[70.0,707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4349945,40.616482]}},{"type":"Feature","properties":{"resourceCoords":[616.0,707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4323622,40.6166978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0235/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p235","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0235/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0235","type":"ImageService3","width":1614,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1320.0,0.0 1329.0,1347.4 1611.6,1339.2 1614.0,1949.0 -0.0,1949.0 -0.0,-0.0 1320.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0235/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1218.0,1117.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.447701,40.603352]}},{"type":"Feature","properties":{"resourceCoords":[1325.0,770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4482261,40.6046098]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0236/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p236","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0236/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0236","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"21.6,0.0 563.8,0.0 562.0,120.0 1314.2,128.7 1317.3,21.3 1033.2,18.2 1033.7,0.0 1416.8,0.0 1383.5,127.7 1577.2,124.8 1579.5,0.0 1616.0,0.0 1616.0,1949.0 277.0,1949.0 287.4,1362.3 1.1,1362.4 21.6,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0236/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.450433250702,40.60685334454128]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44429013252987,40.610295010786146]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43886106034466,40.6046303622216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4450041785168,40.60118869597673]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0237__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p237 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2853.2"},{"label":"split_canvas_h","value":"2432.4"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0237__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0237","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 0.0,603.7 710.3,608.1 713.3,0.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0237__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[92.0,511.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.45261,40.614821]}},{"type":"Feature","properties":{"resourceCoords":[490.2,511.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.451039,40.615558]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0238/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p238","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0238/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0238","type":"ImageService3","width":1616,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1616.0,0.0 1616.0,509.1 1272.8,579.1 1326.3,829.8 1616.0,771.6 1616.0,1949.0 1447.3,1949.0 1579.2,1615.2 1292.0,1575.4 1294.9,1949.0 1054.7,1949.0 1051.5,1726.8 1015.0,1727.3 1015.0,1659.3 873.7,1642.8 852.4,1729.7 469.6,1735.2 469.4,1753.4 753.3,1752.4 751.7,1859.8 -0.0,1862.0 0.0,0.0 1616.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0238/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45304906807559,40.613173816541234]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44683684589741,40.61654852687442]}},{"type":"Feature","properties":{"resourceCoords":[1616.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44151289462656,40.61082069351393]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44772511680473,40.607445983180746]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0239/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p239","metadata":[{"label":"streets","value":"24"},{"label":"intersections","value":"52"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0239/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0239","type":"ImageService3","width":1615,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1229.0,40.8 1615.0,254.0 1615.0,1947.4 1134.0,1949.0 840.3,1856.1 814.6,1949.0 330.2,1949.0 258.2,1671.9 -0.0,1590.2 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0239/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[884.0,400.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.442963,40.614634]}},{"type":"Feature","properties":{"resourceCoords":[719.0,1633.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.441538,40.610242]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p24","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0024","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"151.9,156.6 341.3,155.6 340.6,0.0 1363.7,0.0 1370.8,973.9 1125.8,975.2 1132.6,1799.2 857.4,1802.8 158.3,1809.8 151.9,156.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4681151,40.6059473]}},{"type":"Feature","properties":{"resourceCoords":[159.0,1395.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4679778,40.6056502]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0240/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p240","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0240/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0240","type":"ImageService3","width":1615,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"574.3,602.9 318.6,658.7 316.1,537.2 192.5,538.9 185.6,283.0 1325.3,272.0 1326.6,1005.1 1615.0,1005.0 1615.0,1949.0 -0.0,1949.0 -0.0,817.0 130.6,818.5 319.0,776.1 317.1,1129.7 671.2,1049.3 702.9,1276.7 317.7,1366.1 315.4,1511.5 790.1,1380.5 574.3,602.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0240/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44135129507795,40.614975926434845]}},{"type":"Feature","properties":{"resourceCoords":[1615.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43384423745198,40.615589140869815]}},{"type":"Feature","properties":{"resourceCoords":[1615.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43287623180619,40.60866313502413]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44038328943216,40.60804992058916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0241/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p241","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0241/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0241","type":"ImageService3","width":1615,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1464.9 -0.0,-0.0 1615.0,0.0 1615.0,352.1 1407.2,1949.0 1276.5,1949.0 1146.8,1949.0 942.0,1948.0 -0.0,1464.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0241/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45017325483549,40.620698240598735]}},{"type":"Feature","properties":{"resourceCoords":[1615.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44268904550626,40.62189728273315]}},{"type":"Feature","properties":{"resourceCoords":[1615.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44079609556155,40.61499297936932]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44828030489079,40.6137939372349]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0242/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p242","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0242/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0242","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"16.4,277.5 -0.0,64.4 63.4,64.3 57.5,0.0 671.5,0.0 671.6,64.0 811.5,64.0 809.5,355.8 845.4,355.9 846.1,739.4 931.1,739.1 928.9,0.0 1056.3,0.0 1057.5,356.4 1180.2,356.7 1181.1,510.4 1550.3,508.1 1550.2,676.4 1426.8,675.2 1427.3,720.1 1550.1,720.6 1550.1,855.4 1499.8,851.2 1487.8,1535.5 1620.0,1537.0 1620.0,1893.5 1486.6,1894.7 1487.1,1744.2 1413.9,1741.5 1412.3,1949.0 273.6,1949.0 272.5,1882.7 207.7,1645.7 87.1,1678.1 120.6,1794.3 89.7,1802.5 88.4,1931.9 -0.0,1949.0 -0.0,278.9 16.4,277.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0242/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44267632614067,40.620852174775194]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43514665211863,40.62152331074478]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43409039130519,40.61459847986319]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44162006532723,40.61392734389361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0243/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p243","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0243/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0243","type":"ImageService3","width":1619,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1619.0,0.0 1619.0,1949.0 -0.0,1949.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0243/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44561939418183,40.626388176968696]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43803868264091,40.62704918793855]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43699762722136,40.62007369714939]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.44457833876228,40.61941268617953]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0244/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p244","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0244/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0244","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1705.7 -0.0,74.1 692.6,0.0 905.0,0.0 1389.0,0.0 1620.0,71.6 1620.0,202.0 1620.0,1128.3 1620.0,1179.4 1436.1,1637.5 1033.9,1821.5 915.5,1838.6 694.5,1821.5 -0.0,1705.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0244/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43929515640723,40.62471427307346]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4316676690434,40.625405741977495]}},{"type":"Feature","properties":{"resourceCoords":[1620.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43057934321683,40.6183913688404]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43820683058065,40.61769989993636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0245/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p245","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0245/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0245","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.2,780.5 251.3,780.7 250.5,1170.5 321.1,1170.6 320.4,414.9 90.0,413.5 89.5,188.0 323.6,185.7 323.8,121.5 343.4,121.5 343.4,104.7 509.6,105.2 509.7,54.6 1624.0,56.1 1624.0,562.9 1477.2,564.0 1477.1,312.5 1246.8,312.0 1246.3,779.0 1478.9,781.0 1512.8,1084.6 1496.7,1088.5 1488.1,1253.3 1281.2,1299.9 1265.8,1888.0 560.2,1875.8 560.9,1653.5 102.9,1647.2 134.6,1631.8 96.0,1552.9 93.5,1470.8 -0.0,1470.3 -0.0,565.5 90.5,565.1 92.2,780.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0245/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43317150232426,40.62520134249938]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.42558664268374,40.62590408500295]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.42448329129864,40.618946130992654]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.43206815093916,40.618243388489084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0246/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p246","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"28"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0246/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0246","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.2,1339.2 241.3,1291.9 249.7,1126.6 265.8,1122.7 231.7,818.3 -0.0,817.0 -0.0,348.5 229.4,348.4 229.8,600.7 376.0,599.2 375.6,169.9 850.7,173.7 851.0,90.3 1081.2,90.0 1081.8,175.5 1194.0,176.3 1195.8,89.9 1624.9,60.4 1632.0,1949.0 -0.0,1949.0 -0.0,1928.7 20.5,1929.0 35.2,1339.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0246/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[531.0,599.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.424541,40.623961]}},{"type":"Feature","properties":{"resourceCoords":[851.0,599.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.42304,40.624097]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p247 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6528.0"},{"label":"split_canvas_h","value":"2091.6"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"695.1,457.6 696.2,383.9 1268.2,384.7 1268.8,0.0 0.0,-0.0 -0.0,456.6 695.1,457.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[697.0,328.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.436062,40.625209]}},{"type":"Feature","properties":{"resourceCoords":[697.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.436192,40.626026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p247 [2]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"22"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2062.0"},{"label":"split_canvas_w","value":"6528.0"},{"label":"split_canvas_h","value":"3679.6"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"366.2,1385.2 366.3,1435.4 530.4,1435.4 530.4,1385.2 1630.7,1383.7 1632.0,522.9 0.0,515.5 -0.0,916.8 116.9,916.7 116.9,926.2 -0.0,926.4 -0.0,1313.6 117.2,1313.6 117.0,1385.4 366.2,1385.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[117.0,1034.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.432914,40.62631]}},{"type":"Feature","properties":{"resourceCoords":[117.0,1385.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.432716,40.625049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p247 [3]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5741.2"},{"label":"split_canvas_w","value":"6528.0"},{"label":"split_canvas_h","value":"2054.8"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247","type":"ImageService3","width":1632,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"382.6,1949.0 858.1,1949.0 857.8,1865.7 1088.2,1863.5 1089.4,1949.0 1201.8,1949.0 1202.8,1862.5 1632.0,1829.7 1632.0,1435.3 379.9,1435.4 382.6,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0247__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[857.0,1744.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.423392,40.626341]}},{"type":"Feature","properties":{"resourceCoords":[233.0,1519.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.426437,40.626895]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p25","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"27"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0025","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,1763.4 51.4,196.4 1629.0,190.1 1629.0,1612.2 1513.8,1611.0 1514.0,1756.0 40.0,1763.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[657.0,991.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4756324,40.6105072]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,1756.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4731067,40.6097291]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p26","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"33"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0026","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.1,1795.2 124.0,163.7 1402.8,144.9 1401.2,0.0 1629.0,0.0 1629.0,1625.8 1433.0,1625.2 1435.0,1769.8 143.1,1795.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[790.0,1782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.473209,40.606581]}},{"type":"Feature","properties":{"resourceCoords":[562.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4743555,40.607839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p27","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0027","type":"ImageService3","width":1612,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"89.3,1793.8 94.1,155.7 1496.8,157.5 1491.6,1793.1 1184.5,1793.2 1186.7,1949.0 365.6,1949.0 366.0,1794.2 89.3,1793.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[781.0,1217.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.493145,40.602192]}},{"type":"Feature","properties":{"resourceCoords":[552.0,1794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.49319,40.601068]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p28","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"28"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0028","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1786.9 306.3,1791.1 334.4,159.6 1271.3,170.6 1263.9,407.3 1621.0,416.0 1621.0,750.3 1259.6,743.5 1245.1,1804.0 1164.0,1802.9 1162.5,1949.0 -0.0,1949.0 -0.0,1786.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[786.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.490493,40.602927]}},{"type":"Feature","properties":{"resourceCoords":[546.0,399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4917243,40.6041673]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p29","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"35"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0029","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.7,1789.5 84.8,721.6 448.8,724.5 445.2,387.9 85.5,383.1 90.5,144.6 1497.7,147.7 1491.0,1786.8 81.7,1789.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[795.0,1543.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4875823,40.6030896]}},{"type":"Feature","properties":{"resourceCoords":[1494.0,725.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.486691,40.604908]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p2 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1593.2"},{"label":"split_canvas_h","value":"2388.4"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0002","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"72.0,486.4 100.2,443.1 384.7,452.6 396.1,74.6 12.9,135.9 72.0,486.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47443725692081,40.60362841645003]}},{"type":"Feature","properties":{"resourceCoords":[398.3,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47252901199394,40.60390111973817]}},{"type":"Feature","properties":{"resourceCoords":[398.3,597.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47199402663593,40.60171252619767]}},{"type":"Feature","properties":{"resourceCoords":[0.0,597.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47390227156279,40.60143982290953]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p3","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0003","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,290.4 187.4,291.4 188.0,151.0 1420.0,148.8 1424.0,1949.0 -0.0,1949.0 -0.0,290.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1253.0,469.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4664773,40.601445]}},{"type":"Feature","properties":{"resourceCoords":[188.0,151.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4690724,40.6013296]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p30","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0030","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"339.0,1796.7 312.6,155.4 1629.0,135.0 1629.0,1778.5 339.0,1796.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[798.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4854379,40.6047844]}},{"type":"Feature","properties":{"resourceCoords":[1051.0,1790.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.484239,40.6035356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p32","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"38"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0032","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"212.9,169.2 349.2,170.3 350.7,0.0 1333.3,0.0 1332.5,176.1 1385.3,176.3 1378.0,1168.0 1301.2,1167.8 1293.8,1589.0 1387.5,1676.2 1291.5,1720.8 1288.4,1894.2 1621.0,1900.1 1621.0,1949.0 336.5,1949.0 338.3,1582.8 -0.0,1632.1 -0.0,1163.5 204.3,1164.2 212.9,169.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[911.0,832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4873408,40.593778]}},{"type":"Feature","properties":{"resourceCoords":[679.0,500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4889273,40.5946166]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p33","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"40"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0033","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1639.2 -0.0,1211.7 77.8,1210.6 67.5,204.4 1497.4,185.3 1502.8,520.0 1621.0,518.7 1621.0,643.2 1539.2,662.1 1327.7,762.8 1337.7,1949.0 -0.0,1949.0 -0.0,1773.0 96.6,1726.1 -0.0,1639.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1019.0,327.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4818911,40.5973065]}},{"type":"Feature","properties":{"resourceCoords":[311.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4841928,40.5946484]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p34","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0034","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.4,468.6 172.8,137.2 1341.2,132.9 1338.6,435.8 1304.0,482.9 1233.0,503.9 1254.9,506.3 1256.8,660.4 1621.0,856.6 1621.0,1949.0 815.5,1949.0 841.2,1839.5 611.9,1812.8 581.5,1949.0 497.7,1949.0 433.6,1934.1 470.3,1785.6 355.0,1763.4 312.6,1949.0 -0.0,1949.0 -0.0,707.4 210.3,609.5 291.4,591.5 292.4,468.2 175.4,468.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[362.0,325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4788418,40.5979391]}},{"type":"Feature","properties":{"resourceCoords":[362.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.479143,40.598577]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0035","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,946.6 220.2,951.0 217.6,175.9 1314.9,179.1 1305.3,961.6 1403.3,962.0 1400.9,1776.8 -0.0,1771.1 -0.0,946.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.48374222675197,40.61046588876646]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47655281836242,40.61247473884096]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.47339360704187,40.60586598385337]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.48058301543142,40.603857133778874]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p36","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0036","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,976.0 123.0,975.5 119.5,479.4 5.2,478.7 2.8,326.1 119.3,326.8 118.8,83.0 -0.0,84.6 -0.0,-0.0 283.1,0.0 284.8,202.5 1394.3,197.9 1364.9,320.4 1409.5,320.2 1409.9,472.4 1326.5,471.9 1295.2,591.9 1525.5,590.9 1525.7,713.9 1412.0,714.2 1412.2,844.2 1294.4,845.1 1291.2,969.8 1621.0,968.1 1621.0,1787.3 -0.0,1794.0 -0.0,976.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[588.0,202.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.5083432,40.603015]}},{"type":"Feature","properties":{"resourceCoords":[588.0,1381.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.506449,40.598996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0037","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1779.1 -0.0,1369.8 122.2,1371.2 123.2,1260.8 122.7,888.1 -0.0,886.5 -0.0,-0.0 49.7,0.0 48.0,154.0 324.7,151.8 323.6,0.0 667.1,0.0 637.1,215.4 843.9,218.7 843.7,153.2 1366.3,156.4 1364.5,556.9 1397.2,557.0 1394.2,1376.2 1129.6,1375.9 1128.6,1576.3 1334.7,1575.9 1335.1,1780.2 -0.0,1779.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46836354573965,40.61161458045362]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46112880069799,40.61362075476077]}},{"type":"Feature","properties":{"resourceCoords":[1621.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45797374366603,40.60697043803432]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46520848870769,40.60496426372717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p38","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0038","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1168.8 -0.0,969.3 262.0,967.1 260.9,151.6 1038.9,158.8 1064.5,174.4 1080.2,243.6 1106.3,270.8 1169.6,0.0 1621.0,0.0 1621.0,1949.0 1124.3,1949.0 999.0,1927.3 1006.4,1906.5 870.5,1880.2 584.7,1763.3 647.5,1460.3 638.4,1395.5 587.8,1366.8 205.5,1369.8 204.0,1166.5 -0.0,1168.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[413.0,1164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4589145,40.6081521]}},{"type":"Feature","properties":{"resourceCoords":[413.0,1367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.458589,40.607455]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p39","metadata":[{"label":"streets","value":"21"},{"label":"intersections","value":"45"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0039","type":"ImageService3","width":1621,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"205.3,1052.9 13.9,1054.8 12.2,931.5 -0.0,931.6 -0.0,819.6 206.2,817.9 201.1,111.1 323.2,109.8 322.9,0.0 1284.0,0.0 1277.5,592.9 1612.0,506.2 1621.0,1691.7 1389.2,1694.2 1389.2,1814.0 214.4,1824.9 205.3,1052.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[678.0,1047.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4946961,40.6067815]}},{"type":"Feature","properties":{"resourceCoords":[554.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.496736,40.609835]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0004","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1856.2 -0.0,98.5 718.5,96.4 719.2,0.0 859.0,0.0 856.7,128.5 1641.0,146.0 1641.0,1822.8 748.7,1831.1 671.5,1949.0 80.4,1949.0 174.3,1857.4 -0.0,1856.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46644723865688,40.602248902858506]}},{"type":"Feature","properties":{"resourceCoords":[1641.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46278182593463,40.60328202981879]}},{"type":"Feature","properties":{"resourceCoords":[1641.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4611770547604,40.5999533656639]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46484246748265,40.59892023870361]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0040","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1464.0 0.0,0.0 1622.0,0.0 1617.2,1949.0 1491.0,1949.0 1490.9,1919.5 125.7,1841.0 -0.0,1464.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0040/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.49367535051712,40.611176609440925]}},{"type":"Feature","properties":{"resourceCoords":[1622.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.48641217143191,40.61307441865001]}},{"type":"Feature","properties":{"resourceCoords":[1622.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.48342939816891,40.60640203454358]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.49069257725412,40.604504225334495]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p41","metadata":[{"label":"streets","value":"23"},{"label":"intersections","value":"80"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0041","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.1,1041.3 84.1,917.4 268.2,917.9 269.8,691.2 86.2,690.4 86.2,570.7 304.9,571.4 316.1,120.4 -0.0,214.7 0.0,0.0 1207.0,0.0 1203.4,103.5 1368.5,104.4 1362.0,1047.1 811.3,1043.9 810.9,1816.3 592.6,1812.1 592.0,1949.0 140.4,1949.0 140.5,1942.5 265.9,1945.1 273.9,1812.2 170.3,1812.7 176.9,1042.0 84.1,1041.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0041/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[697.0,807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.483393,40.610801]}},{"type":"Feature","properties":{"resourceCoords":[605.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.483415,40.609881]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p42","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"65"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0042","type":"ImageService3","width":1620,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"169.5,1889.3 163.3,943.7 -0.0,945.0 0.0,0.0 1620.0,0.0 1620.0,438.0 1429.5,461.4 1440.5,1874.8 169.5,1889.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[705.0,1179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.478744,40.613875]}},{"type":"Feature","properties":{"resourceCoords":[705.0,1645.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.478008,40.612289]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p43","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"72"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0043","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"18.4,385.3 222.3,350.1 221.1,0.0 1624.0,0.0 1624.0,707.8 1561.6,707.8 1563.9,1005.1 1454.1,1005.2 1452.1,878.2 1344.0,879.3 1350.7,1886.8 1286.6,1887.2 1286.6,1949.0 227.8,1949.0 227.6,1897.7 212.9,1949.0 95.0,1949.0 94.7,1898.2 35.5,1898.5 18.4,385.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[941.0,1640.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.47093,40.614216]}},{"type":"Feature","properties":{"resourceCoords":[941.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.470762,40.61385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p44","metadata":[{"label":"streets","value":"21"},{"label":"intersections","value":"43"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0044/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0044","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.3,1108.7 53.3,161.4 154.9,160.3 156.9,279.8 260.1,279.6 257.8,0.0 1321.6,0.0 1277.9,407.3 1466.1,557.8 1500.4,670.5 1505.1,1874.8 800.8,1882.8 801.7,1949.0 593.5,1949.0 621.3,1730.5 275.7,1735.9 278.4,1889.5 -0.0,1896.0 -0.0,1109.1 60.3,1108.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[267.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.468302,40.61494]}},{"type":"Feature","properties":{"resourceCoords":[1070.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.463743,40.613749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0045","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,0.0 1624.0,0.0 1599.8,1511.2 686.4,1610.3 715.5,1738.6 233.6,1908.5 203.8,1835.8 -0.0,1706.0 0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.46633458388614,40.62366763428189]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45889450714358,40.62499510080817]}},{"type":"Feature","properties":{"resourceCoords":[1624.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.45681032845525,40.61816986482846]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.4642504051978,40.616842398302175]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p46","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0046","type":"ImageService3","width":1625,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"248.1,1478.7 250.3,350.9 237.0,246.4 730.0,130.1 715.5,0.0 1625.0,0.0 1625.0,1949.0 1476.8,1949.0 1476.5,1728.4 1021.1,1728.9 973.2,1949.0 926.0,1949.0 915.2,1905.0 871.5,1887.0 71.7,1883.2 71.0,1481.0 248.1,1478.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[451.0,1099.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4609133,40.6145294]}},{"type":"Feature","properties":{"resourceCoords":[71.0,1481.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4620122,40.6127717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p5","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0005","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1513.5,1803.4 -0.0,1803.0 -0.0,-0.0 112.2,0.0 111.0,131.3 1517.5,128.8 1513.5,1803.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1271.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.483698,40.597319]}},{"type":"Feature","properties":{"resourceCoords":[106.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.486302,40.596601]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p6","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"35"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0006","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"109.6,1814.2 102.3,140.4 1324.9,127.0 1325.0,374.8 1563.2,373.2 1561.1,576.6 1641.0,575.0 1641.0,963.8 1527.3,964.4 1527.0,1802.0 109.6,1814.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1287.0,375.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4816634,40.6006297]}},{"type":"Feature","properties":{"resourceCoords":[1527.0,1802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4799881,40.5983462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p7","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"32"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0007","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1426.6,1799.5 200.2,1807.8 200.8,975.1 313.9,974.6 314.1,588.1 234.6,589.6 236.8,387.4 -0.0,388.9 -0.0,142.7 1413.9,132.8 1426.6,1799.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[986.0,1399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4785447,40.599525]}},{"type":"Feature","properties":{"resourceCoords":[567.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4801411,40.6006596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p8","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0008","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"247.6,1813.8 250.6,139.2 1349.0,149.0 1344.0,1818.9 247.6,1813.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[941.0,982.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4763612,40.6009522]}},{"type":"Feature","properties":{"resourceCoords":[1349.0,149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4761318,40.6026207]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allentown, Pennsylvania | 1932 | sanborn07494_005 p9","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"29"}],"created":"2026-09-20T17:13:37Z","modified":"2026-09-20T17:13:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0009","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.9,1789.6 166.3,128.6 1000.9,124.1 1006.0,961.0 1420.6,962.9 1430.4,1788.2 174.9,1789.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074941932:07494_1932-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[597.0,1380.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4741519,40.6007417]}},{"type":"Feature","properties":{"resourceCoords":[1007.0,1787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.4728993,40.6002958]}}]}}]}