{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn05793_029.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Buffalo, New-York | 1950 | key map | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g05793195006:05793_06_1950-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Buffalo, New-York | 1950 | sanborn05793_029 p0 [1]","metadata":[{"label":"streets","value":"190"},{"label":"intersections","value":"302"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"7093.5"},{"label":"split_canvas_h","value":"8217.6"}],"created":"2026-10-18T08:25:53Z","modified":"2026-10-18T08:25:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g05793195006:05793_06_1950-0000__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g05793195006:05793_06_1950-0000","type":"ImageService3","width":1667,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1667,0.0 724.4,0.0 729.0,671.9 730.0,799.0 0.0,799.0 0.0,1949 1667,1949 1667,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g05793195006:05793_06_1950-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.9,1154.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.8136666,42.925922]}},{"type":"Feature","properties":{"resourceCoords":[255.9,1507.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-78.8390816,42.9138385]}}]}}]}