{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn08935_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Northfield, Vermont | 1903 | 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:gmd375m:g3754m:g3754nm:g089351903:08935_1903-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Northfield, Vermont | 1903 | sanborn08935_004 p1 [2]","metadata":[{"label":"streets","value":"21"},{"label":"intersections","value":"26"},{"label":"split_canvas_x","value":"2902.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3975.8"},{"label":"split_canvas_h","value":"5261.3"}],"created":"2026-09-22T06:15:25Z","modified":"2026-09-22T06:15:25Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754nm:g089351903:08935_1903-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754nm:g089351903:08935_1903-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 725.6,-0.0 725.6,0.0 727.7,1203.2 727.9,1315.3 1060.5,1313.2 1613,1309.3 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754nm:g089351903:08935_1903-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[891.7,225.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.660788,44.15169]}},{"type":"Feature","properties":{"resourceCoords":[1033.5,671.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.6579912,44.1437347]}}]}}]}