{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07834_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Montgomery, Pennsylvania | 1912 | 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":"14"},{"label":"placed","value":"8"},{"label":"unplaced","value":"6"},{"label":"fit sources","value":"georef-snap 6, georef 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 9 panels"},{"label":"unplaced pages","value":"p1__1 (tier 1, 41.16800,-76.87729 +/-100m); p2__2 (tier 1, 41.16971,-76.87053 +/-132m); p4__2 (tier 1, 41.23783,-76.72715 +/-113m); p5__1 (tier 1, 41.17374,-76.87356 +/-100m); p5__3 (tier 1, 41.17321,-76.87328 +/-100m); p5__4 (tier 1, 41.17364,-76.87187 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p2 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.50"},{"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":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1527.6,71.3 1453.7,20.8 973.9,21.4 715.5,132.9 672.2,261.7 694.0,891.9 614.9,1169.3 316.1,1171.4 161.6,1273.2 80.0,1466.8 156.3,1783.3 430.6,1869.2 1001.3,1894.7 1338.3,1846.0 1504.5,1848.5 1507.5,1848.3 1527.6,71.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,1603.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.88122724854622,41.16919840553466]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.88019220491253,41.170442367637136]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1325.0,1687.3 940.3,1719.5 736.4,1734.0 259.8,1788.8 113.6,1804.5 98.8,111.0 132.6,56.0 177.1,114.5 203.8,71.7 333.8,113.2 321.0,177.8 504.2,258.4 557.0,227.0 556.5,281.4 745.2,278.6 850.4,75.0 940.9,28.9 1454.0,51.6 1504.2,97.1 1500.1,337.3 1523.1,363.4 1345.3,883.6 1431.9,894.8 1363.0,1338.2 1381.2,1683.2 1325.0,1687.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[118.0,1162.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.88012022153055,41.17043518378146]}},{"type":"Feature","properties":{"resourceCoords":[1357.0,1678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87675542830968,41.170485231268174]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"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":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"627.0,1905.3 643.6,1814.5 1107.9,1912.0 1473.2,1912.0 1468.1,1649.9 1439.3,1515.9 1392.2,1266.0 1240.2,533.8 1087.2,94.9 801.9,106.0 812.9,137.8 513.5,111.1 484.5,27.8 475.2,1.0 455.4,1.0 441.2,5.9 217.2,83.1 139.0,107.2 94.5,180.8 147.7,427.7 529.2,543.9 655.5,1166.1 637.9,1351.9 528.0,1487.5 528.0,1488.4 527.2,1488.4 525.9,1490.0 326.5,1499.5 87.6,1688.6 627.0,1905.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[726.0,665.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87485190224561,41.172688126257995]}},{"type":"Feature","properties":{"resourceCoords":[516.0,25.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87372086247103,41.17353736632456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p5 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.77"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2337.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4114.4"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"861.0,1566.7 893.2,1572.2 893.0,1600.3 892.5,1684.9 1154.0,1805.0 1154.2,1772.9 1415.2,1854.5 1414.9,1912.0 1462.6,1912.0 1493.3,1087.4 1414.3,1091.8 1416.9,382.1 1424.4,383.1 1535.9,26.8 1448.7,110.0 1118.5,225.1 1048.5,151.8 914.4,199.8 666.2,86.4 629.7,551.5 798.2,1000.9 655.6,1187.0 638.2,1493.8 587.0,1535.6 586.8,1559.7 586.8,1562.3 634.1,1564.4 861.0,1566.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[893.3,1567.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.873703,41.17363]}},{"type":"Feature","properties":{"resourceCoords":[1417.1,1567.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.8727643,41.172956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.5,1487.9 63.5,1325.3 68.5,1170.1 81.0,673.3 95.5,462.1 117.9,62.8 747.8,109.5 933.8,106.0 1091.8,110.5 1259.2,97.4 1602.0,76.3 1568.4,338.6 1505.8,369.6 1506.0,918.1 1591.2,1188.4 1540.3,1383.3 1577.6,1815.5 1472.7,1872.5 836.4,1888.0 587.8,1769.1 52.8,1803.8 49.5,1823.9 41.5,1487.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1518.0,-8.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87489089643792,41.16834302573125]}},{"type":"Feature","properties":{"resourceCoords":[300.0,1114.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87875170869968,41.16915503114099]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"469.2,85.8 601.6,78.2 847.6,70.2 1570.3,33.5 1612.0,25.8 1612.0,63.8 1502.3,80.4 1496.0,473.1 1514.7,471.1 1548.8,1272.2 1551.7,1271.9 1564.0,1541.1 1580.4,1712.2 1586.1,1711.7 1612.0,1727.4 1571.6,1783.9 1391.4,1771.8 1254.5,1862.7 1028.3,1889.7 70.4,1833.7 52.8,1506.4 49.1,1505.7 51.0,1166.5 49.2,1000.6 64.1,845.2 72.9,661.6 160.7,44.0 469.2,85.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1348.0,1357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87258051886698,41.16974954655675]}},{"type":"Feature","properties":{"resourceCoords":[37.0,628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87623324539958,41.169435919222174]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p8","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.66"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.0,1760.2 27.2,1760.4 21.3,1760.4 21.3,1583.8 35.1,1307.0 32.1,1307.0 75.7,484.1 56.4,484.3 101.4,83.1 215.2,76.8 218.9,38.0 576.6,7.2 581.2,56.6 1436.7,9.3 1458.2,152.6 1503.0,414.0 1421.5,423.7 1509.8,1300.5 1497.8,1299.8 1431.0,1300.0 1436.9,1565.9 1444.8,1708.8 1459.9,1709.0 1560.9,1831.9 1536.0,1860.5 929.4,1870.3 622.3,1742.3 206.5,1739.1 84.2,1742.2 52.1,1779.0 54.0,1760.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[609.0,1300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.871275,41.170782]}},{"type":"Feature","properties":{"resourceCoords":[1431.0,1300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.869797,41.171751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Montgomery, Pennsylvania | 1912 | sanborn07834_004 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.39"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T19:45:52Z","modified":"2026-10-19T19:45:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.4,1398.5 35.8,570.7 112.7,564.0 78.4,316.7 53.4,104.3 746.2,64.8 745.7,72.2 1100.0,160.0 1153.6,209.8 1364.4,86.8 1511.8,146.5 1583.2,1265.6 1473.6,1685.3 1511.3,1759.0 1392.8,1668.3 1127.6,1673.1 1036.1,1771.6 730.8,1777.9 668.6,1855.3 494.5,1886.8 153.3,1869.3 124.6,1900.2 33.2,1781.5 19.0,1780.9 15.8,1646.2 18.3,1395.8 81.2,1397.6 92.4,1398.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078341912:07834_1912-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[706.0,534.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.87000597325256,41.17384653056321]}},{"type":"Feature","properties":{"resourceCoords":[741.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.86775432028908,41.172119576138925]}}]}}]}