{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02261_002.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Aurora, Indiana | 1892 | 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:gmd409m:g4094m:g4094am:g4094am_g022611892:02261_1892-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Aurora, Indiana | 1892 | sanborn02261_002 p1 [1]","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"22"},{"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":"4052.1"}],"created":"2026-09-22T16:23:37Z","modified":"2026-09-22T16:23:37Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094am:g4094am_g022611892:02261_1892-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094am:g4094am_g022611892:02261_1892-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613,0.0 1185.5,0.0 0.0,0.0 0.0,912.2 436.7,914.5 619.4,1013.0 1181.2,1012.6 1613,1012.3 1613,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094am:g4094am_g022611892:02261_1892-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[451.9,660.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.9003776,39.0552543]}},{"type":"Feature","properties":{"resourceCoords":[363.1,210.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-84.8994769,39.0603258]}}]}}]}