{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn05228_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ogallala, Nebraska | 1920 | mapsnap generated fit (2026-10-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-22"},{"label":"run","value":"corpus-v2.1"},{"label":"pages","value":"6"},{"label":"placed","value":"3"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 41.12711,-101.72169 +/-335m); p1__2 (tier 4, 41.12711,-101.72169 +/-335m); p1__3 (tier 4, 41.12711,-101.72169 +/-335m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ogallala, Nebraska | 1920 | sanborn05228_005 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.64"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:27:21Z","modified":"2026-10-22T13:27:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.1,1898.6 48.3,1851.0 100.2,1491.7 26.0,1139.6 42.1,66.6 508.0,18.0 1475.8,35.0 1504.8,38.4 1576.0,657.8 1533.2,1851.3 1612.0,1859.5 1612.0,1865.6 1479.3,1864.5 1226.5,1862.5 1019.0,1864.0 565.4,1863.3 124.0,1862.7 123.8,1880.7 120.1,1898.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1019.0,1864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.7194178,41.1265671]}},{"type":"Feature","properties":{"resourceCoords":[1019.0,35.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.7201907,41.1301227]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ogallala, Nebraska | 1920 | sanborn05228_005 p3","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:27:21Z","modified":"2026-10-22T13:27:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"51.7,113.0 27.0,1759.9 89.8,1862.5 1415.2,1887.8 1573.6,1833.5 1593.5,78.7 1574.1,28.2 1535.7,22.0 1534.7,21.9 1534.8,28.2 1397.8,28.4 1137.1,28.9 923.1,32.4 455.3,36.2 1.0,39.9 1.0,80.1 51.7,113.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[931.0,992.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.719028,41.124758]}},{"type":"Feature","properties":{"resourceCoords":[931.0,1464.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.718846,41.123867]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ogallala, Nebraska | 1920 | sanborn05228_005 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.45"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:27:21Z","modified":"2026-10-22T13:27:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.9,1601.1 49.9,96.5 329.7,18.3 1578.3,77.7 1587.0,1866.6 42.9,1847.0 30.9,1601.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd419m:g4194m:g4194om:g052281920:05228_1920-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.72774884952848,41.12983591851329]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.7237532093401,41.130311203103396]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.72301012765155,41.126716485716656]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.72700576783993,41.12624120112655]}}]}}]}