{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03985_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Detroit, Michigan | 1897 | key map | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985189703:03985_03_1897-0000__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1897 | sanborn03985_006 p0 [1]","metadata":[{"label":"streets","value":"62"},{"label":"intersections","value":"288"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6767.0"},{"label":"split_canvas_h","value":"8217.6"}],"created":"2026-09-21T08:13:53Z","modified":"2026-09-21T08:13:53Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985189703:03985_03_1897-0000__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985189703:03985_03_1897-0000/info.json","type":"ImageService2","height":7796,"width":6340},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3045.2,8217.6 3020.4,5835.9 3700.6,5297.6 6767.0,5268.9 6767.0,0.0 -0.0,-0.0 0.0,8217.6 3045.2,8217.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985189703:03985_03_1897-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2960.2,4128.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.03958,42.357207]}},{"type":"Feature","properties":{"resourceCoords":[1117.7,5117.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.0501992,42.3463876]}}]}}]}