{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1902 | key map | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190203:03573_03_1902-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1902 | sanborn03573_006 p0","metadata":[{"label":"streets","value":"103"},{"label":"intersections","value":"635"}],"created":"2026-10-24T15:47:47Z","modified":"2026-10-24T15:47:47Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190203:03573_03_1902-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190203:03573_03_1902-0000","type":"ImageService3","width":1459,"height":2097},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,2097.0 0.0,0.0 1459.0,0.0 1459.0,2097.0 0.0,2097.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573190203:03573_03_1902-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[313.1,1551.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6103635,39.3025969]}},{"type":"Feature","properties":{"resourceCoords":[325.9,1886.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6089942,39.29058]}}]}}]}