{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn06671_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dayton, Ohio | 1919 | 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:gmd408m:g4084m:g4084dm:g4084dm_g06671191902:06671_02_1919-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dayton, Ohio | 1919 | sanborn06671_006 p0","metadata":[{"label":"streets","value":"257"},{"label":"intersections","value":"546"}],"created":"2026-09-21T10:58:09Z","modified":"2026-09-21T10:58:09Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084dm:g4084dm_g06671191902:06671_02_1919-0000/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084dm:g4084dm_g06671191902:06671_02_1919-0000/info.json","type":"ImageService2","height":7796,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6592.0,7796.0 -0.0,7796.0 -0.0,-0.0 6592.0,0.0 6592.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd408m:g4084m:g4084dm:g4084dm_g06671191902:06671_02_1919-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4771.7,3172.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.206713,39.766315]}},{"type":"Feature","properties":{"resourceCoords":[4554.7,4257.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.2096979,39.758607]}}]}}]}