{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03401_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Shreveport, Louisiana | 1899 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014sm:g034011899:03401_1899-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Shreveport, Louisiana | 1899 | sanborn03401_004 p1","metadata":[{"label":"streets","value":"58"},{"label":"intersections","value":"143"}],"created":"2026-09-22T19:26:57Z","modified":"2026-09-22T19:26:57Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014sm:g034011899:03401_1899-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014sm:g034011899:03401_1899-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1715.8 0.0,1067.9 -0.0,984.3 0.0,912.2 0.0,866.8 0.0,723.8 0.0,525.4 0.0,0.0 1613.0,0.0 1613.0,1913.0 -0.0,1913.0 0.0,1715.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014sm:g034011899:03401_1899-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1082.3,1088.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.750532,32.513689]}},{"type":"Feature","properties":{"resourceCoords":[1082.3,1272.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.747225,32.510387]}}]}}]}