{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_010.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1914 | 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_g03573191403:03573_03_1914-0000__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1914 | sanborn03573_010 p0 [3]","metadata":[{"label":"streets","value":"143"},{"label":"intersections","value":"957"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2365.0"},{"label":"split_canvas_w","value":"6205.8"},{"label":"split_canvas_h","value":"6323.4"}],"created":"2026-10-24T15:14:53Z","modified":"2026-10-24T15:14:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191403:03573_03_1914-0000__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191403:03573_03_1914-0000","type":"ImageService3","width":1444,"height":2067},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1444,2067 1444,595.7 610.8,591.2 610.8,854.3 0.0,854.3 0.0,2067 1444,2067\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573191403:03573_03_1914-0000__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[265.4,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6153404,39.2922852]}},{"type":"Feature","properties":{"resourceCoords":[817.8,1238.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.5951976,39.3112212]}}]}}]}