{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn03985_016.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Detroit, Michigan | 1915 | 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:g03985191508:03985_08_1915-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Detroit, Michigan | 1915 | sanborn03985_016 p0","metadata":[{"label":"streets","value":"96"},{"label":"intersections","value":"413"}],"created":"2026-09-21T10:54:11Z","modified":"2026-09-21T10:54:11Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985191508:03985_08_1915-0000/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985191508:03985_08_1915-0000/info.json","type":"ImageService2","height":7796,"width":6508},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7796.0 -0.0,-0.0 5148.6,0.0 5266.7,0.0 5725.3,0.0 6508.0,0.0 6508.0,4016.9 6508.0,4296.8 6508.0,4704.4 6508.0,5492.2 6508.0,5685.4 6508.0,6202.2 6508.0,7796.0 -0.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd411m:g4114m:g4114dm:g03985191508:03985_08_1915-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2206.7,5112.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.9909374,42.358079]}},{"type":"Feature","properties":{"resourceCoords":[796.2,3395.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.021547,42.368477]}}]}}]}