{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1904 | key map | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g048581904:04858_1904-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Saint Louis, Missouri | 1904 | sanborn04858_002 p0","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"33"}],"created":"2026-10-19T19:36:54Z","modified":"2026-10-19T19:36:54Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g048581904:04858_1904-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g048581904:04858_1904-0000","type":"ImageService3","width":1627,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1920.0 0.0,0.0 1627.0,0.0 1627.0,1920.0 0.0,1920.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g048581904:04858_1904-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1407.7,799.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2781459,38.6491844]}},{"type":"Feature","properties":{"resourceCoords":[584.4,1668.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.304527,38.6326385]}}]}}]}