{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn08304_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dickson, Tennessee | 1941 | key map | mapsnap generated fit (2026-09-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-20"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd396m:g3964m:g3964dm:g3964dm_g083041941:08304_1941-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dickson, Tennessee | 1941 | sanborn08304_007 p1","metadata":[{"label":"streets","value":"33"},{"label":"intersections","value":"83"}],"created":"2026-09-20T17:20:59Z","modified":"2026-09-20T17:20:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd396m:g3964m:g3964dm:g3964dm_g083041941:08304_1941-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd396m:g3964m:g3964dm:g3964dm_g083041941:08304_1941-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 1613.0,1913.0 -0.0,1913.0 0.0,0.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd396m:g3964m:g3964dm:g3964dm_g083041941:08304_1941-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[467.6,183.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.3846669,36.077906]}},{"type":"Feature","properties":{"resourceCoords":[123.8,336.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.3962856,36.0817492]}}]}}]}