{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02843_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Tama, Iowa | 1906 | 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:gmd415m:g4154m:g4154tm:g028431906:02843_1906-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Tama, Iowa | 1906 | sanborn02843_005 p1 [2]","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"58"},{"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":"2349.4"}],"created":"2026-10-19T12:52:27Z","modified":"2026-10-19T12:52:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431906:02843_1906-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431906:02843_1906-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 0.0,0.0 0.0,587.4 1613,587.4 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431906:02843_1906-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[298.1,298.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.5780362,41.9646023]}},{"type":"Feature","properties":{"resourceCoords":[205.8,298.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.5806818,41.9645893]}}]}}]}