{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn01569_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Boise, Idaho | 1956 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd427m:g4274m:g4274bm:g015691956:01569_1956-0000__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Boise, Idaho | 1956 | sanborn01569_007 p0 [2]","metadata":[{"label":"streets","value":"223"},{"label":"intersections","value":"436"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"7085.6"},{"label":"split_canvas_h","value":"8460.9"}],"created":"2026-09-23T19:12:47Z","modified":"2026-09-23T19:12:47Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd427m:g4274m:g4274bm:g015691956:01569_1956-0000__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd427m:g4274m:g4274bm:g015691956:01569_1956-0000","type":"ImageService3","width":1665,"height":2010},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1665,2010 1665,0.0 -0.0,-0.0 0.0,146.5 112.9,1465.5 112.9,2010 1665,2010\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd427m:g4274m:g4274bm:g015691956:01569_1956-0000__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[570.8,1124.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-116.2384933,43.606154]}},{"type":"Feature","properties":{"resourceCoords":[860.7,397.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-116.2169755,43.6443891]}}]}}]}