{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_026.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1951 | 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_g03573195104:03573_04_1951-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1951 | sanborn03573_026 p0","metadata":[{"label":"streets","value":"131"},{"label":"intersections","value":"497"}],"created":"2026-10-24T15:20:11Z","modified":"2026-10-24T15:20:11Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195104:03573_04_1951-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195104:03573_04_1951-0000","type":"ImageService3","width":1426,"height":2038},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,2038.0 0.0,0.0 1426.0,0.0 1426.0,2038.0 0.0,2038.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195104:03573_04_1951-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[303.1,1308.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6126174,39.2790452]}},{"type":"Feature","properties":{"resourceCoords":[433.3,1502.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6066937,39.2729162]}}]}}]}