{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03604_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Frostburg, Maryland | 1904 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036041904:03604_1904-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frostburg, Maryland | 1904 | sanborn03604_004 p1 [1]","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"19"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"4493.5"}],"created":"2026-09-22T04:40:11Z","modified":"2026-09-22T04:40:11Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036041904:03604_1904-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036041904:03604_1904-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1123.4 838.0,1121.1 1613,1118.7 1613,0.0 1557.5,0.0 1390.2,0.0 -0.0,-0.0 0.0,1123.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036041904:03604_1904-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[525.0,764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.9269239,39.6499407]}},{"type":"Feature","properties":{"resourceCoords":[301.8,378.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.9325693,39.6571244]}}]}}]}