{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00381_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alvarado, California | 1901 | 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":"8"},{"label":"placed","value":"1"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 37.59685,-122.08006 +/-100m); p1__2 (tier 1, 37.59263,-122.07702 +/-253m); p1__3 (tier 4, 37.59685,-122.08006 +/-100m); p1__4 (tier 4, 37.59685,-122.08006 +/-100m); p3__1 (tier 1, 37.59484,-122.08196 +/-208m); p3__2 (tier 1, 37.59645,-122.07832 +/-181m); p4 (tier 4, 37.59685,-122.08006 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003811901:00381_1901-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alvarado, California | 1901 | sanborn00381_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:31:11Z","modified":"2026-10-22T13:31:11Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003811901:00381_1901-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003811901:00381_1901-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1543.1,1884.0 905.2,1883.0 704.1,1803.5 125.8,1816.8 124.7,1713.0 42.5,1647.0 23.5,1239.3 25.8,734.9 131.2,147.9 139.2,207.2 562.0,210.3 738.3,45.4 864.1,21.8 1480.7,112.0 1483.1,356.8 1574.2,563.5 1537.9,1372.3 1609.3,1831.4 1543.1,1884.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364am:g4364am_g003811901:00381_1901-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1009.0,877.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.07988059004968,37.596485092844105]}},{"type":"Feature","properties":{"resourceCoords":[1009.0,461.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.07892565216707,37.59647743863726]}}]}}]}