{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00380_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alturas, California | 1912 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"9"},{"label":"placed","value":"7"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 5, georef-snap 1, snap:0 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p1__3 (tier 1, 41.50784,-120.17241 +/-125m); p1__4 (tier 4, 41.48546,-120.54192 +/-866m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p1 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.26"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3065.6"},{"label":"split_canvas_h","value":"5409.2"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"383.6,1229.3 700.9,1226.9 737.1,1077.3 724.9,44.9 32.3,83.7 22.0,1064.0 65.4,1324.0 388.6,1304.3 383.6,1229.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[270.1,856.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5412243,41.49278]}},{"type":"Feature","properties":{"resourceCoords":[270.1,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5412498,41.4946002]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1522.1,1618.7 1557.0,1618.5 1488.7,1912.0 1470.8,1912.0 1458.8,1912.0 1458.8,1893.6 816.1,1836.0 39.4,1880.7 40.8,98.9 130.1,33.2 188.8,78.1 396.4,20.8 713.7,90.2 973.1,18.7 1468.3,38.0 1469.5,34.4 1538.2,187.0 1564.2,187.1 1543.1,783.9 1534.0,783.8 1560.7,1205.9 1569.3,1205.8 1522.1,1618.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1164.0,1210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.54253057407247,41.487346682432765]}},{"type":"Feature","properties":{"resourceCoords":[506.0,1621.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.54354618477832,41.48854037976672]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p3","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"918.7,54.5 1203.2,122.8 1203.2,88.8 1603.9,137.3 1604.3,350.2 1597.4,1030.5 1602.0,1210.9 1593.8,1472.8 1591.4,1853.9 1193.5,1849.8 606.9,1841.0 288.4,1845.3 82.4,1843.2 13.2,1436.8 14.4,1257.3 45.6,69.1 204.4,21.4 918.9,25.6 918.7,54.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1197.0,1029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5434968,41.4849201]}},{"type":"Feature","properties":{"resourceCoords":[1197.0,1471.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5434794,41.4840897]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"73.7,97.4 494.4,74.3 494.3,83.4 1088.8,109.0 1089.1,83.2 1241.7,16.4 1421.3,76.9 1539.9,35.0 1546.5,79.0 1612.0,109.2 1612.0,134.7 1590.5,1828.4 1612.0,1828.4 1612.0,1864.5 1612.0,1870.6 1076.4,1863.0 1076.4,1866.2 474.6,1865.2 474.7,1856.1 58.8,1855.0 61.7,1466.7 70.4,1199.8 65.9,1016.1 73.8,322.8 73.7,97.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54269576255128,41.48680032842695]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.53875371490079,41.486850735741484]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.53867447248129,41.483323626519635]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54261652013177,41.483273219205095]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p5","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"23.3,945.4 18.4,624.3 26.1,32.8 410.9,37.1 816.0,37.7 815.9,54.0 1505.5,53.0 1609.8,60.2 1561.9,899.4 1599.4,1848.4 1555.2,1898.5 1077.4,1855.6 460.6,1897.7 135.0,1857.0 85.7,1821.2 70.0,1841.6 23.4,1179.2 23.3,945.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54339308987082,41.48342748878505]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54333724274656,41.48042581188399]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54809487941591,41.480376251496814]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.54815072654017,41.48337792839787]}},{"type":"Feature","properties":{"resourceCoords":[816.0,38.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5434581,41.481908]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p6 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"949.9,1856.0 1612.0,1848.7 1576.8,1752.5 1499.3,1274.2 1494.5,716.6 1472.9,665.8 1246.2,662.0 1097.0,662.0 900.0,662.0 900.0,662.0 893.7,656.1 873.4,330.1 808.5,271.9 807.9,153.4 538.2,87.5 538.6,131.2 246.8,173.4 155.8,174.8 155.8,175.8 155.8,186.6 155.5,440.7 158.6,440.7 165.1,1032.2 156.1,1032.2 160.3,1441.0 160.7,1842.3 545.0,1843.0 949.8,1839.7 949.9,1856.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[942.0,1028.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5414399,41.481929]}},{"type":"Feature","properties":{"resourceCoords":[545.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.5434708,41.482662]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alturas, California | 1912 | sanborn00380_002 p6 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.89"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3600.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2852.0"},{"label":"split_canvas_h","value":"2648.0"}],"created":"2026-10-19T18:02:02Z","modified":"2026-10-19T18:02:02Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1331.2,579.3 1600.0,649.1 1606.1,1.0 1537.5,1.0 910.0,8.8 909.5,396.4 951.4,397.2 947.2,661.0 1016.3,661.0 1038.3,661.0 1330.9,623.1 1331.2,579.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003801912:00380_1912-0006__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[900.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.5376850616068,41.48351133865877]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.53765169405929,41.482184603316284]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,662.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.53929795807306,41.48216142157685]}},{"type":"Feature","properties":{"resourceCoords":[900.0,662.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-120.53933132562057,41.483488156919336]}},{"type":"Feature","properties":{"resourceCoords":[1332.0,405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-120.538672,41.4826933]}}]}}]}