{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07652_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ellwood City, Pennsylvania | 1921 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"33"},{"label":"placed","value":"23"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 18, georef-snap 3, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 19 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 40.86363,-80.27489 +/-256m); p10__2 (tier 1, 40.85516,-80.28206 +/-100m); p13__1 (tier 2, 40.85384,-80.28513 +/-418m); p13__2 (tier 2, 40.85384,-80.28513 +/-418m); p13__3 (tier 1, 40.85345,-80.28848 +/-100m); p16__2 (tier 1, 40.85823,-80.30105 +/-114m); p17__3 (tier 1, 40.85910,-80.30090 +/-100m); p17__4 (tier 1, 40.86012,-80.29732 +/-198m); p18__2 (tier 1, 40.85692,-80.29679 +/-180m); p22__1 (tier 4, 40.85948,-80.28602 +/-2952m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p10 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"87.0,1838.0 293.1,1837.5 293.5,1913.0 1613.0,1913.0 1613.0,720.2 1027.5,720.3 1030.6,0.0 78.0,0.0 87.0,1838.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28260966123828,40.85802749768425]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.27864821323159,40.8580864554225]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.27855558827694,40.85453972670102]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28251703628364,40.854480768962766]}},{"type":"Feature","properties":{"resourceCoords":[87.0,1838.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.282307,40.854623]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p11","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1369.1,981.5 1371.6,1913.0 -0.0,1913.0 -0.0,800.9 93.5,800.7 92.2,71.5 1469.5,69.5 1471.1,981.3 1369.1,981.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[94.0,757.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.288799,40.854084]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,526.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.285466,40.854565]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p12","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1407.0,156.9 1404.9,499.1 1613.0,499.8 1613.0,1913.0 -0.0,1913.0 -0.0,951.6 101.7,951.6 103.0,143.8 1407.0,156.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[744.0,727.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2839,40.854173]}},{"type":"Feature","properties":{"resourceCoords":[744.0,273.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.283928,40.855008]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p14","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"190.4,1813.2 192.0,1236.0 -0.0,1234.7 -0.0,-0.0 1613.0,0.0 1613.0,659.6 1531.4,659.2 1528.5,1820.6 190.4,1813.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[858.0,1826.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.293849,40.857298]}},{"type":"Feature","properties":{"resourceCoords":[192.0,1236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.295521,40.858367]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p15 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3646.4"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4005.6"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1534.5,1869.2 1540.4,985.5 -0.0,962.3 -0.0,1254.5 308.2,1369.8 306.5,1562.0 -0.0,1495.8 -0.0,1913.0 527.0,1913.0 716.0,1913.0 1345.2,1913.0 1345.8,1864.6 1534.5,1869.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,911.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29593356441622,40.85737501841662]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,911.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29203047633344,40.85747801886019]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29194647237131,40.85563124216654]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29584956045409,40.855528241722965]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p15 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"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":"3678.4"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,342.3 1259.5,337.1 1042.3,0.0 123.7,0.0 125.3,838.9 1613.0,869.4 1613.0,342.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0015__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[124.0,531.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.282546,40.862273]}},{"type":"Feature","properties":{"resourceCoords":[1078.0,237.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.280232,40.862855]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p16 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"20"},{"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":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0016__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,0.0 1377.3,0.0 1371.9,138.6 372.8,133.3 378.0,0.0 -0.0,-0.0 -0.0,1913.0 1352.6,1913.0 1355.2,1296.2 1284.0,1297.0 1284.0,715.0 1613.0,713.4 1613.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0016__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1284.0,715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.298866,40.8583066]}},{"type":"Feature","properties":{"resourceCoords":[1284.0,1297.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.298828,40.857228]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p17 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2436.4"},{"label":"split_canvas_h","value":"2610.0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"603.4,0.0 0.0,0.0 0.0,652.5 609.1,652.3 603.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29137969463655,40.862502438054555]}},{"type":"Feature","properties":{"resourceCoords":[609.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28838793283549,40.86247856945941]}},{"type":"Feature","properties":{"resourceCoords":[609.1,652.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28842183514917,40.860056891938896]}},{"type":"Feature","properties":{"resourceCoords":[0.0,652.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29141359695022,40.86008076053404]}},{"type":"Feature","properties":{"resourceCoords":[492.1,544.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.288991,40.860462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p17 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"2413.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4038.4"},{"label":"split_canvas_h","value":"3306.8"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,0.0 1359.0,0.0 1258.9,0.0 603.4,0.0 609.1,652.3 610.6,812.3 1613.0,778.8 1613.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0017__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[603.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.30111258395644,40.86083958339176]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29866523251327,40.86081682050124]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,826.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.2986897038682,40.859290541236355]}},{"type":"Feature","properties":{"resourceCoords":[603.4,826.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.30113705531137,40.85931330412687]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p18 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2863.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4788.4"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"437.5,1913.0 579.0,1913.0 868.0,1913.0 1306.5,1913.0 1306.0,1849.2 1613.0,1913.0 1613.0,1719.5 1303.8,1606.3 1301.3,1312.0 1482.0,1310.5 1485.1,728.1 896.5,723.3 103.5,721.8 104.0,1310.5 437.0,1306.2 437.5,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[104.0,1310.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.298828,40.857228]}},{"type":"Feature","properties":{"resourceCoords":[1482.0,1310.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.295492,40.857293]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,0.0 167.3,-0.0 161.8,54.1 1243.6,160.4 1274.8,266.8 1613.0,301.7 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28480870995553,40.870410020763146]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28395331678026,40.864539448309564]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29309557784623,40.86376684988222]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.2939509710215,40.8696374223358]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"135.7,1818.8 130.0,665.8 211.6,665.6 206.7,10.7 1462.3,0.0 1477.2,1811.9 135.7,1818.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29260480654798,40.8607419284874]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28863565779615,40.860789905953716]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28856095148521,40.85720449782599]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.29253010023704,40.85715652035967]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p20","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"10"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"190.3,1669.3 87.8,1767.1 -0.0,1788.8 -0.0,1106.2 99.8,1065.1 93.2,0.0 1613.0,0.0 1613.0,619.7 1578.8,618.7 1577.8,670.9 1613.0,670.5 1613.0,1409.5 1613.0,1411.6 1613.0,1913.0 1132.0,1913.0 1021.6,1747.2 668.9,1753.0 666.6,1602.2 293.4,1608.0 190.3,1669.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[95.0,973.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.284943,40.866163]}},{"type":"Feature","properties":{"resourceCoords":[95.0,436.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.284963,40.86817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p21","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"34"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"51.3,1577.9 49.9,1613.3 -0.0,1610.0 -0.0,0.0 1613.0,-0.0 1613.0,1913.0 1290.2,1913.0 1303.2,1636.9 51.3,1577.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[874.0,715.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.273011,40.864467]}},{"type":"Feature","properties":{"resourceCoords":[529.0,1165.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.2753047,40.8656523]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0022__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p22 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2795.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3656.4"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1371.8,0.0 1278.0,0.0 934.7,0.0 946.6,858.0 698.9,1610.5 700.6,1913.0 1613.0,1913.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1116.5,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.251548,40.857582]}},{"type":"Feature","properties":{"resourceCoords":[1116.5,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.250945,40.858147]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p3","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"131.5,558.5 -0.0,558.2 -0.0,169.8 1613.0,118.7 1613.0,717.6 1493.7,720.4 1500.0,1789.0 139.4,1796.2 131.5,558.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1152.0,122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.286523,40.861629]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.285597,40.85855]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p4","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1479.1,1822.1 122.5,1826.5 120.8,134.6 1475.8,131.1 1479.1,1822.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[800.0,724.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.28723,40.85742]}},{"type":"Feature","properties":{"resourceCoords":[124.0,1601.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.288849,40.855761]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p5","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.8,1913.0 762.3,1913.0 737.6,1841.2 635.5,1802.2 126.3,1792.5 129.1,719.9 248.8,718.1 254.0,117.0 1428.4,118.6 1419.8,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1118.0,429.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.283264,40.861117]}},{"type":"Feature","properties":{"resourceCoords":[768.0,117.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.284139,40.861676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"27.2,1913.0 30.5,13.0 1527.3,45.3 1527.3,0.0 1613.0,0.0 1613.0,1913.0 27.2,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28260095595009,40.86172824792983]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.2786858296425,40.86179721117985]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.27857844453025,40.858260654460814]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.28249357083784,40.8581916912108]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p7 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3039.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4612.8"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1412.0,1892.0 1410.0,1296.4 1411.2,1061.5 1613.0,1061.6 1613.0,763.8 861.6,761.9 657.0,879.2 448.4,1071.8 272.0,1112.6 277.4,760.5 0.0,759.8 -0.0,1274.8 283.5,1298.8 184.2,1541.9 134.6,1894.8 1412.0,1892.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[758.0,1296.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.284173,40.862789]}},{"type":"Feature","properties":{"resourceCoords":[1410.0,1296.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.282565,40.862817]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p7 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"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":"3055.2"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1366.4,667.9 1388.1,420.0 1460.2,186.7 1218.6,174.6 1224.0,0.0 0.0,-0.0 0.0,759.8 55.0,759.9 1366.4,667.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0007__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1093.0,682.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.286523,40.861629]}},{"type":"Feature","properties":{"resourceCoords":[1093.0,249.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.286484,40.862641]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p8","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,962.1 185.9,964.7 182.8,88.1 1525.2,92.3 1523.0,1422.0 1522.0,1422.0 1522.0,1913.0 -0.0,1913.0 -0.0,962.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[853.0,91.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.290552,40.857362]}},{"type":"Feature","properties":{"resourceCoords":[1522.0,1194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.288841,40.855341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ellwood City, Pennsylvania | 1921 | sanborn07652_006 p9","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"}],"created":"2026-09-23T10:36:40Z","modified":"2026-09-23T10:36:40Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"121.3,114.5 628.6,118.5 730.9,156.2 756.3,227.4 1411.2,220.0 1412.4,326.9 1613.0,325.3 1613.0,413.7 1413.3,414.6 1429.2,1913.0 135.4,1913.0 121.3,114.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g076521921:07652_1921-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[760.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.284009,40.857477]}},{"type":"Feature","properties":{"resourceCoords":[134.0,1812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.285502,40.855402]}}]}}]}