{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn04009_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Flint, Michigan | 1909 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114fm:g040091909:04009_1909-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Flint, Michigan | 1909 | sanborn04009_005 p1","metadata":[{"label":"streets","value":"61"},{"label":"intersections","value":"151"}],"created":"2026-09-22T12:09:00Z","modified":"2026-09-22T12:09:00Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114fm:g040091909:04009_1909-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114fm:g040091909:04009_1909-0001","type":"ImageService3","width":1631,"height":1921},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1921.0 -0.0,-0.0 1631.0,0.0 1631.0,1921.0 -0.0,1921.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114fm:g040091909:04009_1909-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[564.2,1115.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.6947871,43.0232697]}},{"type":"Feature","properties":{"resourceCoords":[592.7,1591.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.6927747,43.0103369]}}]}}]}