{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn05113_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Twin Bridges, Montana | 1921 | 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"},{"label":"pages","value":"6"},{"label":"placed","value":"3"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef-snap 2, georef 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, 45.54334,-112.33081 +/-331m); p1__2 (tier 4, 45.54334,-112.33081 +/-331m); p1__3 (tier 4, 45.54334,-112.33081 +/-331m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Twin Bridges, Montana | 1921 | sanborn05113_003 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T04:07:50Z","modified":"2026-09-22T04:07:50Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1391.1,901.9 1394.2,1337.5 1613.0,1336.0 1613.0,1913.0 -0.0,1913.0 0.0,0.0 1384.8,-0.0 1387.0,313.7 1503.4,313.4 1506.0,903.8 1391.1,901.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.3285970258421,45.54770445445165]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.32863723889787,45.54473730937127]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.33362678280349,45.54477094551618]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.33358656974772,45.54773809059655]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Twin Bridges, Montana | 1921 | sanborn05113_003 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-22T04:07:50Z","modified":"2026-09-22T04:07:50Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1021.6,0.0 1613.0,0.0 1613.0,1913.0 1017.2,1913.0 1017.0,1811.0 433.5,1802.6 433.3,1913.0 -0.0,1913.0 -0.0,0.0 434.7,0.0 432.0,115.0 1021.1,116.5 1021.6,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1017.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.3294739,45.541831]}},{"type":"Feature","properties":{"resourceCoords":[432.0,115.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.3309918,45.54495]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Twin Bridges, Montana | 1921 | sanborn05113_003 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T04:07:50Z","modified":"2026-09-22T04:07:50Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"16.7,269.0 117.9,267.6 114.8,-0.0 1613.0,-0.0 1613.0,1913.0 -0.0,1913.0 -0.0,1282.0 129.7,1280.5 124.7,849.1 15.1,850.1 16.7,269.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254tm:g4254tm_g051131921:05113_1921-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.32876726778647,45.541854851908816]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.32882737265163,45.53886870207725]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.33384835635876,45.53891898188578]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.3337882514936,45.54190513171734]}}]}}]}