{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07498_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ambridge, Pennsylvania | 1923 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"20"},{"label":"placed","value":"15"},{"label":"unplaced","value":"5"},{"label":"fit sources","value":"georef 8, georef-snap 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 12 panels"},{"label":"unplaced pages","value":"p11__2 (tier 1, 40.58284,-80.21394 +/-142m); p13__2 (tier 2, 40.58201,-80.22256 +/-275m); p15__1 (tier 1, 40.58024,-80.22556 +/-115m); p15__2 (tier 1, 40.58095,-80.22679 +/-254m); p9__2 (tier 1, 40.59218,-80.22955 +/-186m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p10 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"882.7,4.7 787.9,254.4 794.8,499.4 715.7,1034.9 712.7,1034.9 712.7,1035.2 593.9,1034.3 237.8,1032.3 106.8,1106.9 124.4,1204.1 92.9,1327.2 91.6,1573.9 170.9,1671.4 139.2,1825.4 891.5,1902.0 888.4,1912.0 950.3,1912.0 950.5,1847.3 1128.7,1629.8 1571.7,1629.1 1572.8,1248.1 1573.4,1120.3 1574.2,848.9 1612.0,844.9 1439.0,802.5 1463.5,456.1 1475.2,408.6 1497.5,317.3 1541.5,137.7 1200.3,56.3 956.6,1.0 882.6,1.0 882.7,4.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1162.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.23101246436602,40.59148253503143]}},{"type":"Feature","properties":{"resourceCoords":[1573.0,1621.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22866885221664,40.59050771698912]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p10 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.52"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3198.4"},{"label":"split_canvas_h","value":"4140.8"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"755.5,116.0 613.7,125.0 558.9,59.6 287.4,103.4 237.2,60.3 31.4,60.5 12.6,259.6 35.1,262.6 17.9,304.4 49.5,449.2 7.9,739.1 12.4,937.7 25.9,936.7 29.0,1029.8 170.9,1031.0 193.9,1029.8 701.8,1003.9 658.9,924.6 738.7,606.1 748.1,609.0 767.4,379.6 759.0,1.0 755.9,1.0 755.5,116.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[230.9,504.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.23275486739321,40.60047137259442]}},{"type":"Feature","properties":{"resourceCoords":[682.6,1011.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.23069903601959,40.59858411846283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p11 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.94"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"65.6,1563.7 137.0,1545.6 338.2,1753.5 372.7,1891.0 818.6,1776.2 841.8,1775.5 931.3,1787.5 1009.9,1793.7 1047.9,1786.3 1144.7,1750.2 1178.2,1733.5 1288.4,1733.8 1292.2,1664.0 1384.1,1645.8 1362.2,1598.0 1266.7,1586.8 1263.2,1498.7 1157.0,1340.5 1021.1,1343.8 973.5,1292.3 911.9,884.5 934.1,825.8 908.4,822.0 931.0,539.2 896.5,70.1 785.0,72.8 513.7,72.8 385.3,71.3 250.2,76.2 131.3,73.5 131.3,83.0 35.6,88.5 50.5,743.5 51.6,743.5 52.4,743.5 65.6,1563.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,1183.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2248935,40.5950883]}},{"type":"Feature","properties":{"resourceCoords":[254.0,741.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2261846,40.5967095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.0,33.5 38.9,18.6 799.9,43.0 799.8,26.6 1267.6,19.7 1290.6,24.6 1376.2,57.8 1452.3,82.7 1491.6,84.5 1527.1,87.6 1405.8,568.9 1325.1,1355.9 1343.4,1391.1 1477.7,1439.2 1463.4,1639.4 1485.3,1645.5 1264.2,1751.6 1266.9,1744.8 1077.6,1803.2 991.3,1833.0 926.4,1853.8 795.2,1886.8 712.0,1875.1 593.9,1855.2 556.5,1862.8 382.1,1912.0 381.3,1912.0 379.6,1912.0 256.9,1482.1 133.8,1051.0 65.0,810.4 45.0,761.8 42.1,413.7 39.0,33.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[930.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22402064502423,40.58956313558854]}},{"type":"Feature","properties":{"resourceCoords":[39.0,50.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22909019001162,40.591752705270416]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p13 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"166.2,1731.7 182.9,1731.1 291.1,1912.0 323.9,1872.0 618.2,1877.6 660.1,1773.9 661.7,1553.9 740.5,1377.7 946.7,1044.3 937.8,1027.3 1030.0,815.4 1432.0,533.7 1364.5,495.4 1338.1,399.6 1445.9,112.4 1360.9,60.7 1121.5,102.0 1126.0,96.2 929.9,100.6 839.6,105.6 772.1,107.9 638.2,103.8 562.1,70.1 455.0,19.2 417.4,16.3 237.9,16.0 235.6,15.3 235.6,16.0 241.2,474.4 30.0,924.0 30.4,1360.6 30.5,1476.3 30.5,1535.7 41.2,1553.3 166.2,1731.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[230.0,999.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2231024,40.582373]}},{"type":"Feature","properties":{"resourceCoords":[30.0,924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2241164,40.5822507]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.0,1416.2 96.4,1039.8 93.3,1039.7 96.0,969.0 136.8,913.4 136.7,776.1 110.8,742.7 151.5,701.9 151.4,564.6 110.6,557.2 77.2,471.9 77.0,275.3 125.2,219.6 128.8,82.3 255.0,71.1 299.4,30.3 529.5,22.7 718.6,30.0 785.4,59.6 911.5,44.7 1137.8,111.3 1527.3,103.7 1535.0,560.0 1572.3,801.1 1542.8,1127.7 1572.5,1131.3 1573.0,1858.5 1574.2,1874.5 1461.6,1877.5 1187.7,1878.3 1057.9,1877.1 921.5,1882.4 801.4,1880.0 801.5,1889.6 704.8,1895.4 704.1,1869.0 63.6,1642.8 91.0,1416.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1183.0,882.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22495447632919,40.60278788691744]}},{"type":"Feature","properties":{"resourceCoords":[1183.0,1508.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22495642176905,40.600511753257514]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"564.9,1718.2 95.7,1717.4 65.3,728.2 130.4,630.4 248.3,664.8 285.0,540.4 743.0,227.3 1582.2,471.4 1387.2,1131.3 1397.2,1234.8 1388.7,1729.5 564.9,1718.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[981.0,1731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22836475677573,40.58793627919708]}},{"type":"Feature","properties":{"resourceCoords":[574.0,1731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22920788076937,40.587556929772646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p3","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.7,81.7 144.9,66.4 614.0,59.5 1437.9,57.0 1437.4,943.3 1436.8,1828.5 1238.2,1830.9 108.0,1832.9 105.9,1776.8 145.7,81.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[614.0,944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2281876,40.5861635]}},{"type":"Feature","properties":{"resourceCoords":[614.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2271285,40.584753]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p4","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"157.6,966.0 134.2,966.5 43.9,116.8 47.9,66.8 1165.3,53.6 1361.7,49.2 1380.0,954.1 970.4,1844.8 168.0,1860.0 167.6,1826.7 157.6,966.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[959.0,56.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2262603,40.5851305]}},{"type":"Feature","properties":{"resourceCoords":[168.0,1860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2258054,40.5815041]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p5 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.4,1737.6 114.7,1736.7 132.6,1806.5 189.7,1840.3 513.8,1834.2 855.7,1832.8 1269.5,1822.4 1211.6,1731.6 935.9,1341.1 914.6,1306.3 913.0,959.9 909.1,96.1 104.8,107.8 104.8,1596.8 91.4,1737.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[110.0,968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2247695,40.5801255]}},{"type":"Feature","properties":{"resourceCoords":[504.0,102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2249672,40.5818746]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p5 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.60"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4178.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2274.0"},{"label":"split_canvas_h","value":"6692.0"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1084.7,243.1 1179.5,187.9 1172.9,609.8 1160.3,958.0 1153.0,1288.4 1116.2,1345.1 1044.5,1360.5 1044.5,1384.3 1119.8,1394.5 1284.8,1566.6 1501.9,1569.4 1507.1,1362.3 1580.9,1285.3 1485.9,928.8 1553.2,365.9 1500.5,96.8 1419.6,29.3 1044.5,235.4 1044.5,269.1 1084.7,243.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1080.5,240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2215263013033,40.57990405178454]}},{"type":"Feature","properties":{"resourceCoords":[1175.4,1337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22363188975629,40.57871428460033]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p6","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.6,124.2 53.5,246.1 99.5,1019.4 45.9,1495.2 126.7,1842.0 260.3,1812.8 760.0,1817.0 1448.7,1830.2 1462.4,1291.4 1480.5,572.4 1490.6,334.1 1485.8,227.7 487.2,206.2 164.2,183.2 171.2,1.0 144.7,1.0 138.6,124.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[790.0,740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2322453,40.5976223]}},{"type":"Feature","properties":{"resourceCoords":[1467.0,1108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2305771,40.5969909]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p7","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"185.7,770.8 193.7,877.1 191.0,1116.0 195.1,1836.2 1258.5,1820.5 1604.0,1818.1 1576.3,454.3 313.8,1.0 288.2,1.0 107.8,611.7 185.7,770.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[192.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2305859,40.5976429]}},{"type":"Feature","properties":{"resourceCoords":[191.0,1116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2305903,40.5979749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p8","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.0,600.0 90.0,62.7 1148.7,53.0 1495.0,52.6 1496.6,52.6 1509.8,1687.7 1302.2,1738.9 1044.5,1801.7 770.5,1867.3 679.4,1888.3 584.8,1912.0 360.5,1912.0 204.7,1912.0 90.0,1241.9 90.0,1146.0 90.0,1070.6 90.0,962.0 90.0,600.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[90.0,962.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2305505,40.594997]}},{"type":"Feature","properties":{"resourceCoords":[90.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2305594,40.595664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ambridge, Pennsylvania | 1923 | sanborn07498_004 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3761.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3890.8"}],"created":"2026-10-19T07:16:41Z","modified":"2026-10-19T07:16:41Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"51.1,1052.5 52.2,1596.3 52.3,1822.8 1580.3,1880.8 1579.5,1558.5 1283.2,1048.1 913.8,1050.4 257.9,1050.5 165.0,1051.5 51.1,1052.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g074981923:07498_1923-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[42.0,1835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22914250925463,40.59183690660373]}},{"type":"Feature","properties":{"resourceCoords":[1571.0,1060.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.22607327997333,40.59385817450595]}}]}}]}