{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02624_009.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Davenport, Iowa | 1956 | 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:gmd415m:g4154m:g4154dm:g02624195601A:02624_01A_1956-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Davenport, Iowa | 1956 | sanborn02624_009 p0","metadata":[{"label":"streets","value":"40"},{"label":"intersections","value":"191"}],"created":"2026-09-22T02:44:04Z","modified":"2026-09-22T02:44:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195601A:02624_01A_1956-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195601A:02624_01A_1956-0000","type":"ImageService3","width":1665,"height":2010},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2010.0 -0.0,-0.0 1665.0,0.0 1665.0,2010.0 -0.0,2010.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154dm:g02624195601A:02624_01A_1956-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[603.5,815.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.58293,41.527822]}},{"type":"Feature","properties":{"resourceCoords":[343.5,1004.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.5909137,41.523474]}}]}}]}