{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01838_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"East Saint Louis, Illinois | 1905 | key map | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g01838190502:01838_02_1905-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"East Saint Louis, Illinois | 1905 | sanborn01838_002 p0 [1]","metadata":[{"label":"streets","value":"79"},{"label":"intersections","value":"237"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6926.3"},{"label":"split_canvas_h","value":"8102.0"}],"created":"2026-09-21T15:35:09Z","modified":"2026-09-21T15:35:09Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g01838190502:01838_02_1905-0000__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g01838190502:01838_02_1905-0000","type":"ImageService3","width":1625,"height":1920},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"423.7,0.0 -0.0,-0.0 0.0,1815.9 0.0,1920 582.8,1920 1374.9,1920 1374.9,1744.9 1375.0,1677.2 1625,1678.7 1625,1391.5 1625,0.0 423.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104em:g01838190502:01838_02_1905-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[339.2,1048.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.138588,38.622276]}},{"type":"Feature","properties":{"resourceCoords":[364.2,722.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.1458576,38.6295016]}}]}}]}