{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03795_001.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Milton, Massachusetts | 1901 | 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:gmd376m:g3764m:g3764mm:g037951901:03795_1901-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Massachusetts | 1901 | sanborn03795_001 p1 [2]","metadata":[{"label":"streets","value":"29"},{"label":"intersections","value":"23"},{"label":"split_canvas_x","value":"3334.7"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3543.7"},{"label":"split_canvas_h","value":"3990.8"}],"created":"2026-10-19T00:38:11Z","modified":"2026-10-19T00:38:11Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951901:03795_1901-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951901:03795_1901-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1432.1,0.0 833.7,0.0 833.7,914.8 833.7,992.2 1613,997.7 1613,0.0 1432.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037951901:03795_1901-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1054.5,451.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0716727,42.2647019]}},{"type":"Feature","properties":{"resourceCoords":[934.3,266.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0899149,42.2605046]}}]}}]}