{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn06643_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Chicago Junction, Ohio | 1904 | 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:gmd408m:g4084m:g4084cm:g4084cm_g066431904:06643_1904-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Chicago Junction, Ohio | 1904 | sanborn06643_002 p1 [1]","metadata":[{"label":"streets","value":"29"},{"label":"intersections","value":"88"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6938.1"},{"label":"split_canvas_h","value":"8129.9"}],"created":"2026-09-23T20:26:57Z","modified":"2026-09-23T20:26:57Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066431904:06643_1904-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066431904:06643_1904-0001/info.json","type":"ImageService2","height":7708,"width":6512},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6938.1,0.0 0.0,0.0 0.0,4197.2 0.0,8129.9 1308.4,8129.9 2237.4,8129.9 5001.5,8129.9 4966.5,6270.2 6938.1,6243.2 6938.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066431904:06643_1904-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3357.2,911.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.7243634,41.0615643]}},{"type":"Feature","properties":{"resourceCoords":[1113.7,1955.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.732968,41.058385]}}]}}]}