{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03985_011.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Detroit, Michigan | 1910 | 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://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985191005:03985_05_1910-0000__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 | 1910 | sanborn03985_011 p0 [1]","metadata":[{"label":"streets","value":"146"},{"label":"intersections","value":"373"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6938.2"},{"label":"split_canvas_h","value":"8217.7"}],"created":"2026-09-21T10:15:32Z","modified":"2026-09-21T10:15:32Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985191005:03985_05_1910-0000__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985191005:03985_05_1910-0000","type":"ImageService3","width":1628,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1628,0.0 391.2,0.0 401.7,773.7 58.6,779.0 0.0,779.0 0.0,1949 1628,1949 1628,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114dm:g03985191005:03985_05_1910-0000__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[596.4,1094.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.134253,42.288753]}},{"type":"Feature","properties":{"resourceCoords":[1105.4,284.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.130327,42.331111]}}]}}]}