{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08492_009.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dallas, Texas | 1922 | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492192203:08492_03_1922-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dallas, Texas | 1922 | sanborn08492_009 p0 [1]","metadata":[{"label":"streets","value":"77"},{"label":"intersections","value":"180"},{"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":"8074.1"}],"created":"2026-09-21T10:13:14Z","modified":"2026-09-21T10:13:14Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492192203:08492_03_1922-0000__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492192203:08492_03_1922-0000/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8074.1 6878.4,8074.1 6878.4,2291.8 3806.0,2291.8 3806.0,0.0 0.0,0.0 -0.0,7929.2 -0.0,8074.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492192203:08492_03_1922-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2398.4,3574.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.7735534,32.8133136]}},{"type":"Feature","properties":{"resourceCoords":[2757.8,6952.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.7701194,32.7864089]}}]}}]}