{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn08492_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dallas, Texas | 1905 | 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:gmd403m:g4034m:g4034dm:g4034dm_g08492190501:08492_01_1905-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dallas, Texas | 1905 | sanborn08492_005 p0","metadata":[{"label":"streets","value":"87"},{"label":"intersections","value":"139"}],"created":"2026-09-21T14:50:21Z","modified":"2026-09-21T14:50:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492190501:08492_01_1905-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492190501:08492_01_1905-0000","type":"ImageService3","width":1661,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1949.0 -0.0,-0.0 1661.0,0.0 1661.0,1949.0 -0.0,1949.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492190501:08492_01_1905-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[543.8,1794.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.8004881,32.7788453]}},{"type":"Feature","properties":{"resourceCoords":[903.2,222.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.7877943,32.8250537]}}]}}]}