{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04858_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Saint Louis, Missouri | 1909 | 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_g04858190903:04858_03_1909-0000/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 | 1909 | sanborn04858_006 p0","metadata":[{"label":"streets","value":"100"},{"label":"intersections","value":"331"}],"created":"2026-10-17T19:39:07Z","modified":"2026-10-17T19:39:07Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190903:04858_03_1909-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190903:04858_03_1909-0000","type":"ImageService3","width":1649,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1979.0 0.0,0.0 1649.0,0.0 1649.0,1979.0 0.0,1979.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164sm:g4164sm_g04858190903:04858_03_1909-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[945.8,1379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.1989607,38.6531741]}},{"type":"Feature","properties":{"resourceCoords":[180.0,1760.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.2241666,38.6474533]}}]}}]}