{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn06590_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Ohio | 1926 | key map | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084bm:g4084bm_g065901926:06590_1926-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Ohio | 1926 | sanborn06590_004 p1 [1]","metadata":[{"label":"streets","value":"20"},{"label":"intersections","value":"46"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6938.1"},{"label":"split_canvas_h","value":"3240.4"}],"created":"2026-09-21T21:13:22Z","modified":"2026-09-21T21:13:22Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084bm:g4084bm_g065901926:06590_1926-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084bm:g4084bm_g065901926:06590_1926-0001/info.json","type":"ImageService2","height":7708,"width":6512},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2268.0,3240.4 6938.1,3237.6 6938.1,0.0 0.0,0.0 0.0,2386.2 2231.8,2386.2 2233.7,3240.4 2268.0,3240.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084bm:g4084bm_g065901926:06590_1926-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1979.1,945.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.612854,39.848551]}},{"type":"Feature","properties":{"resourceCoords":[3466.9,1189.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.60134,39.84626]}}]}}]}