{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01471_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Marietta, Georgia | 1900 | key map | mapsnap generated fit (2026-09-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-20"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd392m:g3924m:g3924mm:g3924mm_g014711900:01471_1900-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Marietta, Georgia | 1900 | sanborn01471_004 p1 [1]","metadata":[{"label":"streets","value":"27"},{"label":"intersections","value":"33"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"4804.3"}],"created":"2026-09-20T17:03:36Z","modified":"2026-09-20T17:03:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd392m:g3924m:g3924mm:g3924mm_g014711900:01471_1900-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd392m:g3924m:g3924mm:g3924mm_g014711900:01471_1900-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 0.0,0.0 0.0,1201.1 793.6,1199.5 793.2,1135.5 1613,1135.4 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd392m:g3924m:g3924mm:g3924mm_g014711900:01471_1900-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[508.1,878.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.5490401,33.9515082]}},{"type":"Feature","properties":{"resourceCoords":[768.4,787.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.5435247,33.9531361]}}]}}]}