{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn05741_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Andover, New-York | 1922 | 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:gmd380m:g3804m:g3804am:g3804am_g057411922:05741_1922-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Andover, New-York | 1922 | sanborn05741_006 p1 [2]","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"21"},{"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":"4943.5"}],"created":"2026-09-22T12:09:56Z","modified":"2026-09-22T12:09:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804am:g3804am_g057411922:05741_1922-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804am:g3804am_g057411922:05741_1922-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 956.8,0.0 0.0,0.0 0.0,1229.3 490.1,1231.6 1221.8,1235.4 1304.1,1235.8 1315.9,1235.9 1313.5,1120.1 1486.9,902.1 1613,902.1 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804am:g3804am_g057411922:05741_1922-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1301.0,377.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.798427,42.160041]}},{"type":"Feature","properties":{"resourceCoords":[1436.2,509.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.795246,42.157627]}}]}}]}