{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04789_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mount Vernon, Missouri | 1951 | key map | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164mm:g4164mm_g047891951:04789_1951-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Missouri | 1951 | sanborn04789_007 p1 [2]","metadata":[{"label":"streets","value":"20"},{"label":"intersections","value":"69"},{"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":"4174.2"}],"created":"2026-10-19T10:42:36Z","modified":"2026-10-19T10:42:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164mm:g4164mm_g047891951:04789_1951-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164mm:g4164mm_g047891951:04789_1951-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 0.0,0.0 0.0,846.7 556.9,843.2 560.4,1043.5 1613,1043.5 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164mm:g4164mm_g047891951:04789_1951-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[369.8,284.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.816825,37.101286]}},{"type":"Feature","properties":{"resourceCoords":[216.8,409.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.823024,37.097084]}}]}}]}