{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03674_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Amherst, Massachusetts | 1910 | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764am:g036741910:03674_1910-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Amherst, Massachusetts | 1910 | sanborn03674_005 p1 [1]","metadata":[{"label":"streets","value":"35"},{"label":"intersections","value":"43"},{"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":"8074.1"}],"created":"2026-09-23T02:44:04Z","modified":"2026-09-23T02:44:04Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764am:g036741910:03674_1910-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764am:g036741910:03674_1910-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,8074.1 6878.4,1100.4 6004.3,1111.8 6004.3,626.8 6004.3,0.0 4556.4,0.0 0.0,0.0 -0.0,8074.1 6878.4,8074.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd376m:g3764m:g3764am:g036741910:03674_1910-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3724.0,3187.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.508014,42.378736]}},{"type":"Feature","properties":{"resourceCoords":[1970.8,3417.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.5199196,42.3775602]}}]}}]}