{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn07463_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Silverton, Oregon | 1892 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"2"},{"label":"placed","value":"2"},{"label":"unplaced","value":"0"},{"label":"fit sources","value":"georef-snap 1, georef 1"},{"label":"key map","value":"none"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Silverton, Oregon | 1892 | sanborn07463_002 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T08:59:47Z","modified":"2026-09-21T08:59:47Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,1763.3 120.6,1762.2 42.5,1423.7 37.6,31.5 -0.0,32.1 -0.0,0.0 1613.0,-0.0 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.77993170667035,45.00641438726014]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.7780369738542,45.003790234509324]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.78240780104042,45.00219018044192]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.78430253385658,45.00481433319274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Silverton, Oregon | 1892 | sanborn07463_002 p2","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"20"}],"created":"2026-09-21T08:59:47Z","modified":"2026-09-21T08:59:47Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1610.0,1913.0 -0.0,1913.0 -0.0,0.0 1613.0,-0.0 1613.0,196.7 1501.0,195.6 1500.8,226.8 1537.6,226.6 1538.4,1618.9 1610.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd429m:g4294m:g4294sm:g4294sm_g074631892:07463_1892-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1202.0,1127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.7824772,45.0061017]}},{"type":"Feature","properties":{"resourceCoords":[1535.0,677.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.7810164,45.0059405]}}]}}]}