{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02576_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Belle Plaine, Iowa | 1916 | 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:gmd415m:g4154m:g4154bm:g025761916:02576_1916-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belle Plaine, Iowa | 1916 | sanborn02576_006 p1 [1]","metadata":[{"label":"streets","value":"21"},{"label":"intersections","value":"91"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"4528.1"}],"created":"2026-09-22T05:50:49Z","modified":"2026-09-22T05:50:49Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025761916:02576_1916-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025761916:02576_1916-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 -0.0,-0.0 0.0,1131.8 920.8,1131.9 1158.6,1132.0 1613,1132.0 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025761916:02576_1916-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[468.7,422.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2798613,41.898058]}},{"type":"Feature","properties":{"resourceCoords":[541.2,892.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2781215,41.8889789]}}]}}]}