{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07810_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mercersburg, Pennsylvania | 1885 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"5"},{"label":"placed","value":"2"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 1, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 39.82962,-77.90290 +/-159m); p1__2 (tier 4, 39.82962,-77.90290 +/-159m); p1__3 (tier 1, 39.82755,-77.90645 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0001__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mercersburg, Pennsylvania | 1885 | sanborn07810_001 p1 [4]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.39"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3803.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3848.8"}],"created":"2026-10-18T12:19:03Z","modified":"2026-10-18T12:19:03Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0001__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"169.4,1911.8 1031.6,1906.2 1034.3,1912.0 1221.3,1912.0 1485.7,1911.7 1533.3,1838.9 1576.0,1235.2 1513.5,1006.5 1226.0,992.3 923.1,1144.7 713.2,1168.4 657.9,1328.6 646.8,1485.6 638.5,1479.4 612.1,1461.3 245.9,1186.8 198.3,1151.4 46.7,1179.3 42.2,1471.4 169.4,1911.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0001__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[830.0,1701.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.9023071,39.8304694]}},{"type":"Feature","properties":{"resourceCoords":[250.0,2088.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.9038588,39.8301542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mercersburg, Pennsylvania | 1885 | sanborn07810_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.70"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T12:19:03Z","modified":"2026-10-18T12:19:03Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1525.7,1880.1 1586.8,1520.3 1610.0,63.3 1537.8,22.9 1231.0,97.5 1181.7,43.4 842.2,20.3 558.2,81.1 1.1,83.8 1.0,101.5 1.0,221.9 33.7,219.6 79.4,510.4 18.9,1336.5 115.8,1799.9 171.8,1820.2 165.5,1846.7 1525.7,1880.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824mm:g3824mm_g078101885:07810_1885-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[870.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.90217340303003,39.82824726366601]}},{"type":"Feature","properties":{"resourceCoords":[1546.0,1024.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.9037294761694,39.82695707818747]}}]}}]}