{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00015_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Birmingham, Alabama | 1911 | 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://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191101:00015_01_1911-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Birmingham, Alabama | 1911 | sanborn00015_005 p0 [1]","metadata":[{"label":"streets","value":"38"},{"label":"intersections","value":"443"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6890.4"},{"label":"split_canvas_h","value":"8102.0"}],"created":"2026-09-21T05:58:52Z","modified":"2026-09-21T05:58:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191101:00015_01_1911-0000__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191101:00015_01_1911-0000","type":"ImageService3","width":1616,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1616,0.0 624.3,0.0 620.4,465.6 0.0,457.1 0.0,1920 1616,1920 1616,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191101:00015_01_1911-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[761.4,616.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.829723,33.548882]}},{"type":"Feature","properties":{"resourceCoords":[1164.0,1406.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.8028219,33.5343378]}}]}}]}