{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn08492_026.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dallas, Texas | 1952 | key map | mapsnap generated fit (2026-09-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-24"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492195205:08492_05_1952-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dallas, Texas | 1952 | sanborn08492_026 p0","metadata":[{"label":"streets","value":"49"},{"label":"intersections","value":"35"}],"created":"2026-09-24T01:27:57Z","modified":"2026-09-24T01:27:57Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492195205:08492_05_1952-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492195205:08492_05_1952-0000","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,145.8 1088.0,344.5 1088.0,364.8 1088.0,398.9 1088.0,496.0 1088.0,515.0 1088.0,561.9 1088.0,1350.0 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034dm:g4034dm_g08492195205:08492_05_1952-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[593.3,734.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.8202033,32.7494461]}},{"type":"Feature","properties":{"resourceCoords":[402.9,371.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.839732,32.7832571]}}]}}]}