{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn02695_007.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Iowa City, Iowa | 1920 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154im:g026951920:02695_1920-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Iowa City, Iowa | 1920 | sanborn02695_007 p1","metadata":[{"label":"streets","value":"93"},{"label":"intersections","value":"274"}],"created":"2026-09-23T00:15:54Z","modified":"2026-09-23T00:15:54Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154im:g026951920:02695_1920-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154im:g026951920:02695_1920-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7652.0 -0.0,7652.0 0.0,0.0 3141.8,0.0 3811.0,0.0 4036.7,0.0 6452.0,0.0 6452.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154im:g026951920:02695_1920-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3587.1,4396.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.5265857,41.649439]}},{"type":"Feature","properties":{"resourceCoords":[4231.3,2128.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.520065,41.66679]}}]}}]}