{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn02633_004.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Dubuque, Iowa | 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://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g026331909:02633_1909-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Dubuque, Iowa | 1909 | sanborn02633_004 p0","metadata":[{"label":"streets","value":"137"},{"label":"intersections","value":"247"}],"created":"2026-09-22T01:45:32Z","modified":"2026-09-22T01:45:32Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g026331909:02633_1909-0000/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g026331909:02633_1909-0000/info.json","type":"ImageService2","height":7796,"width":6608},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7796.0 0.0,0.0 6608.0,0.0 6608.0,7796.0 -0.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g026331909:02633_1909-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1956.6,4724.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6741271,42.4990937]}},{"type":"Feature","properties":{"resourceCoords":[3177.0,4989.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6623031,42.5004559]}}]}}]}