{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07508_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Avoca, Pennsylvania | 1913 | 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":"23"},{"label":"placed","value":"13"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 6, georef-snap 6, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p10__3 (tier 1, 41.33092,-75.75279 +/-189m); p11__3 (tier 1, 41.33767,-75.75124 +/-127m); p1__1 (tier 1, 41.33151,-75.74511 +/-182m); p2__2 (tier 1, 41.34608,-75.73674 +/-100m); p2__3 (tier 1, 41.34726,-75.73637 +/-100m); p4__1 (tier 1, 41.34307,-75.73749 +/-100m); p7__2 (tier 1, 41.34198,-75.73439 +/-100m); p7__4 (tier 1, 41.33545,-75.74147 +/-134m); p9__1 (tier 1, 41.33430,-75.74968 +/-100m); p9__2 (tier 1, 41.33494,-75.74863 +/-253m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p10 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.64"},{"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":"4151.2"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1586.0,726.1 1521.1,604.5 1493.2,43.5 729.4,15.0 45.0,42.9 41.2,1007.2 1535.7,1032.7 1547.6,1007.4 1587.0,1023.5 1586.0,726.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[896.0,676.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.752037,41.33119]}},{"type":"Feature","properties":{"resourceCoords":[1490.0,676.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.751345,41.332164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p10 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.30"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4097.6"},{"label":"split_canvas_w","value":"3208.0"},{"label":"split_canvas_h","value":"2198.4"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"26.0,1554.9 337.2,1571.3 337.9,1571.3 702.0,1569.5 785.6,1402.7 719.4,1043.7 648.3,1048.2 643.8,1132.6 543.8,1144.0 162.3,1147.1 54.5,1069.0 1.0,1089.2 1.0,1433.0 26.0,1554.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1024.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75132921248397,41.33235904879879]}},{"type":"Feature","properties":{"resourceCoords":[802.0,1024.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75040817416965,41.333686420158166]}},{"type":"Feature","properties":{"resourceCoords":[802.0,1574.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.74920438512991,41.3332087848792]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1574.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75012542344423,41.331881413519824]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p11 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.44"},{"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":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1330.1,46.4 1298.6,249.0 1179.5,229.1 794.7,176.2 812.7,85.2 759.5,114.6 455.3,27.8 56.0,78.4 89.6,526.5 328.5,556.8 511.5,555.4 526.1,555.3 526.1,555.3 539.7,583.6 626.5,1469.0 996.9,1474.1 1146.3,1472.9 1146.3,1476.2 1151.7,1476.2 1193.3,1784.1 1547.5,1868.7 1578.2,282.3 1504.5,102.4 1344.0,12.7 1330.1,46.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75329032127622,41.3377805403867]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.74989835367607,41.33636589827722]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75211719212933,41.3333240762653]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75550915972948,41.33473871837478]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p11 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.65"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2221.2"},{"label":"split_canvas_w","value":"2129.2"},{"label":"split_canvas_h","value":"3705.6"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"390.8,1431.2 512.5,1427.7 504.1,1221.4 504.1,1126.7 459.1,760.5 497.4,572.0 26.8,586.0 16.6,1346.6 1.0,1359.7 1.0,1453.8 390.8,1431.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,555.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75044449554885,41.33804444064437]}},{"type":"Feature","properties":{"resourceCoords":[532.3,555.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.74947338639453,41.337427517960485]}},{"type":"Feature","properties":{"resourceCoords":[532.3,1481.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75089505162063,41.33614802573791]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1481.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.75186616077495,41.336764948421795]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p2 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.40"},{"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":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"726.7,1883.3 1591.1,1835.3 1582.5,1559.9 1517.7,1540.2 1507.2,1388.2 1413.7,1381.0 1341.0,1270.3 1249.0,1001.5 1245.9,178.5 1257.3,157.3 1304.4,153.7 1288.0,102.7 908.0,129.0 674.5,22.6 404.0,14.9 116.4,87.0 60.6,165.8 18.1,457.6 71.5,1402.2 29.2,1786.2 5.7,1812.2 727.3,1824.7 726.7,1883.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[311.0,1296.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.737384,41.3473841]}},{"type":"Feature","properties":{"resourceCoords":[1364.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7351381,41.3461256]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p3 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"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":"3274.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"766.1,1568.1 754.8,1565.4 817.6,620.2 748.9,158.4 817.7,153.9 817.7,98.4 134.4,93.2 71.7,163.9 127.1,511.4 51.5,860.6 101.2,1777.7 266.5,1738.7 396.5,1720.0 651.6,1769.7 674.4,1774.7 766.1,1568.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[404.9,927.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7380073409432,41.34493794125249]}},{"type":"Feature","properties":{"resourceCoords":[404.9,91.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.73763585376584,41.34648369525644]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p3 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.89"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3274.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3177.2"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1516.2,1302.4 1489.3,1292.6 1455.2,745.9 1476.7,749.0 1479.3,168.5 1218.3,138.0 1088.8,166.8 925.1,218.9 948.9,400.9 869.8,961.8 914.1,1363.0 853.9,1506.2 818.7,1515.4 818.7,1545.5 818.7,1562.5 1138.1,1769.0 1158.3,1692.8 1418.9,1781.1 1521.9,1816.0 1493.8,1364.4 1516.2,1302.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1218.3,712.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7387379,41.3424427]}},{"type":"Feature","properties":{"resourceCoords":[1218.3,138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7383803,41.3434745]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p4 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.66"},{"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":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"789.9,1770.7 795.8,1864.8 948.7,1885.0 969.1,1870.9 1585.9,1864.0 1610.7,1157.2 1488.2,347.6 1559.3,153.9 1612.0,138.6 1612.0,114.3 1346.8,93.5 1327.8,4.8 1290.8,23.4 343.1,19.6 98.2,65.9 99.5,286.7 77.1,291.4 265.8,819.5 245.3,823.7 456.3,1309.0 484.0,1309.0 484.0,1372.8 658.3,1773.5 789.9,1770.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[498.0,771.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7375816,41.3420791]}},{"type":"Feature","properties":{"resourceCoords":[1460.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7352845,41.3413225]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p5","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"243.2,1789.3 136.6,1781.7 40.5,1487.8 128.7,770.1 56.5,79.6 449.3,97.6 551.0,32.0 565.5,76.0 926.5,170.3 922.0,93.1 1192.0,95.4 1432.4,97.5 1435.5,193.1 1590.0,218.2 1515.4,266.3 1489.4,410.1 1585.7,822.5 1591.0,1751.0 1612.0,1766.0 1612.0,1771.4 1443.6,1831.0 1446.7,1912.0 1199.8,1912.0 1199.7,1844.4 933.0,1817.1 933.0,1810.2 674.0,1821.1 674.3,1912.0 613.2,1912.0 420.8,1912.0 420.4,1852.5 295.7,1870.8 243.2,1789.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[929.0,802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7404467,41.3395718]}},{"type":"Feature","properties":{"resourceCoords":[1440.0,802.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.739363,41.3390475]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"392.4,1827.2 75.7,1834.7 32.6,1766.0 51.9,1006.8 142.8,750.0 140.2,482.4 76.6,200.8 43.8,148.5 172.9,131.2 172.6,192.7 434.6,195.9 435.4,102.0 703.3,94.1 703.2,101.2 978.5,132.8 977.8,202.7 1232.8,205.9 1230.7,122.2 1405.5,62.6 1405.6,57.0 1544.2,158.2 1612.0,167.9 1612.0,245.7 1495.3,244.5 1493.3,610.8 1488.3,791.0 1545.0,1012.5 1297.6,1072.2 1381.2,1421.5 1145.0,1608.9 1142.5,1597.8 876.4,1668.2 868.7,1636.1 461.0,1866.2 392.4,1827.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1272.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74189991613716,41.33589957447888]}},{"type":"Feature","properties":{"resourceCoords":[704.0,236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74199849779286,41.337741256213064]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p7 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"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":"3991.2"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.4,1482.8 411.1,1805.8 747.0,1729.3 784.5,1891.0 991.9,1719.2 926.4,1288.5 952.4,469.6 926.3,467.0 926.3,354.2 897.0,224.6 330.1,139.0 329.6,217.3 211.9,215.4 207.7,584.8 201.5,766.5 257.2,990.1 7.4,1048.8 108.4,1482.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[567.9,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74052928489435,41.33553768888696]}},{"type":"Feature","properties":{"resourceCoords":[39.0,1027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74176220483065,41.3358685813757]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p7 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.63"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3991.2"},{"label":"split_canvas_y","value":"1868.0"},{"label":"split_canvas_w","value":"2460.8"},{"label":"split_canvas_h","value":"1192.0"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1055.7,537.1 1055.8,631.3 1320.4,709.7 1316.2,734.2 1488.1,722.0 1489.5,611.1 1519.7,645.9 1539.5,598.4 1530.2,499.8 1411.9,556.7 1277.1,478.6 1055.7,537.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0007__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[997.8,467.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.73478463900726,41.34255029072163]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,467.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.73338251518008,41.34211382281053]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,765.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.73366311171716,41.34160340304164]}},{"type":"Feature","properties":{"resourceCoords":[997.8,765.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-75.73506523554434,41.34203987095274]}},{"type":"Feature","properties":{"resourceCoords":[1055.7,529.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.734711,41.342403]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Avoca, Pennsylvania | 1913 | sanborn07508_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:31:43Z","modified":"2026-10-19T12:31:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"489.9,214.7 490.1,246.6 756.5,238.4 756.5,249.5 1020.3,124.5 1020.9,204.6 1236.2,571.1 1567.0,570.4 1568.0,729.8 1576.5,1827.6 1473.2,1878.2 988.8,1894.4 128.8,1783.7 125.1,963.3 37.1,729.8 76.2,361.9 55.0,342.4 489.9,214.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824am:g3824am_g075081913:07508_1913-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[502.0,1076.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74415159317023,41.33385816831985]}},{"type":"Feature","properties":{"resourceCoords":[502.0,1599.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.74458108565682,41.332922284030936]}}]}}]}