{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00015_008.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_g00015191104:00015_04_1911-0000/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_008 p0","metadata":[{"label":"streets","value":"68"},{"label":"intersections","value":"154"}],"created":"2026-09-21T14:08:00Z","modified":"2026-09-21T14:08:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191104:00015_04_1911-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191104:00015_04_1911-0000","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,928.5 -0.0,668.4 -0.0,620.3 -0.0,-0.0 1627.0,0.0 1627.0,1785.7 1627.0,1949.0 -0.0,1949.0 -0.0,1889.0 -0.0,1861.0 -0.0,1844.4 -0.0,1827.7 -0.0,1805.4 -0.0,1750.0 -0.0,1731.4 -0.0,1636.1 -0.0,1636.1 -0.0,1558.3 -0.0,1000.0 -0.0,928.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g00015191104:00015_04_1911-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[669.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.748694,33.543301]}},{"type":"Feature","properties":{"resourceCoords":[1089.6,1113.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.72602,33.565979]}}]}}]}