{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03613_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Havre De Grace, Maryland | 1894 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036131894:03613_1894-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Havre De Grace, Maryland | 1894 | sanborn03613_002 p1 [2]","metadata":[{"label":"streets","value":"24"},{"label":"intersections","value":"91"},{"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":"4191.6"}],"created":"2026-09-23T05:39:12Z","modified":"2026-09-23T05:39:12Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036131894:03613_1894-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036131894:03613_1894-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 323.4,0.0 236.6,0.0 0.0,-0.0 0.0,1047.9 1613,1036.0 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844hm:g3844hm_g036131894:03613_1894-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[348.2,549.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.0934353,39.545504]}},{"type":"Feature","properties":{"resourceCoords":[223.2,236.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.0972075,39.5527526]}}]}}]}