{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07625_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Downingtown, Pennsylvania | 1886 | 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 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p1__2 (tier 4, 40.00326,-75.70637 +/-475m); p2__2 (tier 4, 40.00326,-75.70637 +/-475m); p2__3 (tier 1, 40.00276,-75.71001 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Downingtown, Pennsylvania | 1886 | sanborn07625_001 p1 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.43"},{"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":"2026-10-18T11:22:06Z","modified":"2026-10-18T11:22:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1552.4,187.6 1516.3,79.1 786.7,116.9 559.6,22.2 54.1,36.3 15.6,933.3 64.9,1822.2 540.4,1889.4 1319.8,1836.7 1386.6,1589.0 1393.0,1583.5 1561.0,1580.2 1574.8,1276.0 1495.0,1057.8 1551.9,596.1 1493.9,523.2 1552.4,187.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[284.0,1424.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7032453,40.0066643]}},{"type":"Feature","properties":{"resourceCoords":[886.0,1424.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.70301,40.005631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Downingtown, Pennsylvania | 1886 | sanborn07625_001 p2 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.32"},{"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":"3382.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T11:22:06Z","modified":"2026-10-18T11:22:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.0,1534.3 372.1,1847.0 651.5,1833.2 703.9,1693.8 744.2,533.0 812.8,160.1 699.4,57.8 210.3,92.0 123.6,129.5 39.2,309.7 134.7,1308.7 41.0,1534.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824dm:g3824dm_g076251886:07625_1886-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[430.2,1599.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.710437,39.999523]}},{"type":"Feature","properties":{"resourceCoords":[430.2,554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.7109144,40.0013077]}}]}}]}