{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00121_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Nenana, Alaska | 1917 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"1"},{"label":"placed","value":"1"},{"label":"unplaced","value":"0"},{"label":"fit sources","value":"georef 1"},{"label":"key map","value":"none"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd437m:g4374m:g4374nm:g001211917:00121_1917-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Nenana, Alaska | 1917 | sanborn00121_001 p1","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.65"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T06:24:43Z","modified":"2026-10-18T06:24:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd437m:g4374m:g4374nm:g001211917:00121_1917-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd437m:g4374m:g4374nm:g001211917:00121_1917-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"12.6,545.9 56.6,41.0 873.1,3.2 1569.9,45.0 1625.5,563.0 1605.4,1905.9 42.2,1888.3 12.6,545.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd437m:g4374m:g4374nm:g001211917:00121_1917-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[709.0,329.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-149.0939225,64.564372]}},{"type":"Feature","properties":{"resourceCoords":[709.0,1879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-149.0940009,64.5614289]}}]}}]}