{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn06656_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Columbus, Ohio | 1891 | 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:gmd408m:g4084m:g4084cm:g4084cm_g066561891:06656_1891-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbus, Ohio | 1891 | sanborn06656_002 p1","metadata":[{"label":"streets","value":"191"},{"label":"intersections","value":"1065"}],"created":"2026-09-21T09:53:20Z","modified":"2026-09-21T09:53:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066561891:06656_1891-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066561891:06656_1891-0001","type":"ImageService3","width":1627,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1352.8,-0.0 1402.0,-0.0 1627.0,-0.0 1627.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd408m:g4084m:g4084cm:g4084cm_g066561891:06656_1891-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[537.7,236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.00612,39.990174]}},{"type":"Feature","properties":{"resourceCoords":[997.5,1787.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.975181,39.939975]}}]}}]}