{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn00009_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Athens, Alabama | 1921 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974am:g3974am_g000091921:00009_1921-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Athens, Alabama | 1921 | sanborn00009_007 p1","metadata":[{"label":"streets","value":"36"},{"label":"intersections","value":"90"}],"created":"2026-09-23T02:30:22Z","modified":"2026-09-23T02:30:22Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974am:g3974am_g000091921:00009_1921-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974am:g3974am_g000091921:00009_1921-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 0.0,0.0 6452.0,0.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974am:g3974am_g000091921:00009_1921-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1262.4,4754.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9779623,34.7943306]}},{"type":"Feature","properties":{"resourceCoords":[2042.6,1582.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9729636,34.8092221]}}]}}]}