{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03663_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Walkersville, Maryland | 1911 | 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":"6"},{"label":"placed","value":"3"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 39.48452,-77.35120 +/-206m); p1__2 (tier 4, 39.48452,-77.35120 +/-206m); p3__2 (tier 1, 39.48582,-77.35117 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Walkersville, Maryland | 1911 | sanborn03663_001 p1 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.80"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1086.4"},{"label":"split_canvas_y","value":"2950.0"},{"label":"split_canvas_w","value":"5365.6"},{"label":"split_canvas_h","value":"4702.0"}],"created":"2026-10-19T23:46:17Z","modified":"2026-10-19T23:46:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"798.2,810.8 860.8,839.1 829.1,943.8 507.5,1250.2 308.0,1881.9 1567.0,1905.9 1558.3,1068.5 1585.3,824.4 1189.8,812.1 1189.8,798.8 798.2,810.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[746.4,1783.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.349716,39.482112]}},{"type":"Feature","properties":{"resourceCoords":[1203.2,1685.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.348808,39.482631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Walkersville, Maryland | 1911 | sanborn03663_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T23:46:17Z","modified":"2026-10-19T23:46:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1424.5,406.5 1410.9,406.5 1453.2,938.0 1486.0,1148.3 1499.5,1356.7 1531.8,1598.9 1567.2,1833.7 1519.0,1882.8 1003.5,1820.2 697.3,1870.0 625.0,1794.5 136.2,1718.3 135.4,1122.8 37.2,414.0 139.4,75.0 306.8,17.5 1408.5,39.0 1453.9,105.8 1577.2,145.7 1424.5,406.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[597.0,410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.35440935311146,39.485718293887835]}},{"type":"Feature","properties":{"resourceCoords":[1416.0,410.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.35248539780642,39.486198536695895]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Walkersville, Maryland | 1911 | sanborn03663_001 p3 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.84"},{"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":"2026-10-19T23:46:17Z","modified":"2026-10-19T23:46:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.8,76.9 108.0,331.4 94.0,330.0 87.7,881.7 101.8,1101.5 96.1,1317.5 106.7,1570.0 121.1,1815.3 166.8,1776.6 325.1,1844.1 721.6,1823.0 721.9,1836.5 1122.9,1839.9 1171.2,1289.5 1209.1,1215.0 1209.2,1197.0 1218.2,1197.0 1221.1,1191.3 1500.0,1191.0 1578.8,1137.0 1470.8,923.6 1553.9,505.2 1322.0,414.1 1441.1,185.6 1441.8,158.7 1035.0,116.3 1031.1,51.0 954.1,26.1 493.5,60.3 402.2,124.9 289.8,76.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844wm:g3844wm_g036631911:03663_1911-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[690.0,387.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3511386,39.4865365]}},{"type":"Feature","properties":{"resourceCoords":[94.0,330.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3525,39.486202]}}]}}]}