{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04620_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Columbia, Missouri | 1902 | 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:gmd416m:g4164m:g4164cm:g4164cm_g046201902:04620_1902-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbia, Missouri | 1902 | sanborn04620_004 p1 [2]","metadata":[{"label":"streets","value":"27"},{"label":"intersections","value":"59"},{"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":"2026-09-21T21:53:08Z","modified":"2026-09-21T21:53:08Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164cm:g4164cm_g046201902:04620_1902-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164cm:g4164cm_g046201902:04620_1902-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,1913 1613,0.0 0.0,0.0 0.0,1422.3 907.2,1422.3 907.2,1913 1613,1913\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164cm:g4164cm_g046201902:04620_1902-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1129.3,580.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.3297115,38.9515672]}},{"type":"Feature","properties":{"resourceCoords":[1128.8,624.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.3297427,38.9505153]}}]}}]}