{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00015_018.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Birmingham, Alabama | 1950 | 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:gmd397m:g3974m:g3974bm:g3974bm_g00015195005:00015_05_1950-0000__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 | 1950 | sanborn00015_018 p0 [1]","metadata":[{"label":"streets","value":"107"},{"label":"intersections","value":"228"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"7699.3"},{"label":"split_canvas_h","value":"8979.6"}],"created":"2026-10-24T15:40:16Z","modified":"2026-10-24T15:40:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015195005:00015_05_1950-0000__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015195005:00015_05_1950-0000","type":"ImageService3","width":1819,"height":2140},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1079.9,0.0 0.0,0.0 0.0,2140 1819,2140 1819,735.3 1209.8,724.2 1079.9,722.1 1079.9,638.4 1079.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015195005:00015_05_1950-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1143.0,972.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.885696,33.518186]}},{"type":"Feature","properties":{"resourceCoords":[1545.3,1883.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.867088,33.480223]}}]}}]}