{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00770_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Costa, California | 1889 | 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":"15"},{"label":"placed","value":"3"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"4 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p1 (tier 4, 38.05518,-122.21807 +/-572m); p10__1 (tier 4, 38.05518,-122.21807 +/-572m); p10__2 (tier 4, 38.05518,-122.21807 +/-572m); p11 (tier 4, 38.05518,-122.21807 +/-572m); p2 (tier 4, 38.05518,-122.21807 +/-572m); p3 (tier 4, 38.05518,-122.21807 +/-572m); p4__1 (tier 1, 37.97650,-122.07408 +/-188m); p4__2 (tier 4, 38.05518,-122.21807 +/-572m); p5__1 (tier 4, 38.05518,-122.21807 +/-572m); p5__2 (tier 4, 38.05518,-122.21807 +/-572m); p6__1 (tier 4, 38.05518,-122.21807 +/-572m); p8 (tier 4, 38.05518,-122.21807 +/-572m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0006__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Costa, California | 1889 | sanborn00770_001 p6 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.44"},{"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":"3868.8"}],"created":"2026-10-19T15:41:06Z","modified":"2026-10-19T15:41:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0006__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.1,623.1 84.5,909.6 1044.9,958.7 1048.7,958.7 1488.0,829.1 1572.3,750.4 1506.9,495.1 1583.4,408.8 1573.5,245.9 1385.3,100.9 1151.8,41.9 523.0,26.8 213.5,92.9 214.0,44.8 31.1,324.4 87.3,323.9 59.8,604.5 1.0,605.6 1.0,623.6 34.1,623.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0006__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[696.0,319.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.2136488,38.055916]}},{"type":"Feature","properties":{"resourceCoords":[1419.0,623.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.2120614,38.0553711]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Costa, California | 1889 | sanborn00770_001 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:41:06Z","modified":"2026-10-19T15:41:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.2,130.8 81.7,76.0 1047.3,13.8 1489.8,150.5 1537.9,1866.3 654.8,1845.8 382.2,1662.8 382.0,1718.1 106.7,1687.8 106.2,1629.0 88.5,1628.8 79.2,130.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[390.0,871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.2168955708316,38.05593759064637]}},{"type":"Feature","properties":{"resourceCoords":[89.0,871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.21689649023563,38.055405146562066]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Costa, California | 1889 | sanborn00770_001 p9","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.75"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T15:41:06Z","modified":"2026-10-19T15:41:06Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"116.2,1815.2 71.1,1654.7 107.8,755.0 48.2,609.2 37.2,141.3 131.8,82.1 709.0,26.4 1447.5,35.1 1588.3,268.0 1527.3,1804.0 1366.9,1856.5 386.8,1820.3 343.3,1871.9 116.2,1815.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007701889:00770_1889-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1176.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.2232586,38.05167]}},{"type":"Feature","properties":{"resourceCoords":[617.0,1027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.2245539,38.0531098]}}]}}]}