{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_012.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1903 | key map | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190309:04858_09_1903-0000/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 | 1903 | sanborn04858_012 p0","metadata":[{"label":"streets","value":"85"},{"label":"intersections","value":"393"}],"created":"2026-10-17T20:40:22Z","modified":"2026-10-17T20:40:22Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190309:04858_09_1903-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190309:04858_09_1903-0000","type":"ImageService3","width":1654,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1979.0 0.0,0.0 1654.0,0.0 1654.0,1979.0 0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190309:04858_09_1903-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1132.0,947.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2407077,38.5988688]}},{"type":"Feature","properties":{"resourceCoords":[1392.5,1100.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2334397,38.5942838]}}]}}]}