{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01219_001.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Milton, Delaware | 1911 | 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:gmd383m:g3834m:g3834mm:g012191911:01219_1911-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Milton, Delaware | 1911 | sanborn01219_001 p1 [2]","metadata":[{"label":"streets","value":"21"},{"label":"intersections","value":"38"},{"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":"4184.0"}],"created":"2026-09-23T04:47:03Z","modified":"2026-09-23T04:47:03Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd383m:g3834m:g3834mm:g012191911:01219_1911-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd383m:g3834m:g3834mm:g012191911:01219_1911-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,-0.0 -0.0,0.0 0.0,3379.2 0.0,4165.0 975.0,4167.3 6878.4,4184.0 6878.4,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd383m:g3834m:g3834mm:g012191911:01219_1911-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2900.7,2136.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3107467,38.7744055]}},{"type":"Feature","properties":{"resourceCoords":[1624.2,762.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-75.3124128,38.7805138]}}]}}]}