{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00768_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Pomona, California | 1887 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"5"},{"label":"placed","value":"3"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 3"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 34.05740,-117.75424 +/-347m); p2 (tier 1, 34.03305,-118.14172 +/-236m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pomona, California | 1887 | sanborn00768_002 p1 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1918.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5734.0"}],"created":"2026-10-17T05:02:28Z","modified":"2026-10-17T05:02:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"297.3,1905.6 1067.1,1872.7 1095.3,1424.2 1105.9,1416.5 1216.9,1416.5 1265.8,1416.5 1552.5,1403.5 1571.9,561.5 1482.5,502.5 169.2,496.3 48.6,534.7 86.7,886.9 80.4,886.8 150.6,918.4 150.6,1385.8 152.3,1866.6 297.2,1867.2 297.3,1905.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[629.0,915.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7512323,34.0578141]}},{"type":"Feature","properties":{"resourceCoords":[1089.0,915.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7501659,34.0578419]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pomona, California | 1887 | sanborn00768_002 p1 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.07"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4423.6"},{"label":"split_canvas_y","value":"5667.2"},{"label":"split_canvas_w","value":"2028.4"},{"label":"split_canvas_h","value":"1984.8"}],"created":"2026-10-17T05:02:28Z","modified":"2026-10-17T05:02:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1601.5,1879.8 1604.0,1876.0 1612.0,1876.0 1612.0,1853.3 1606.0,1854.1 1591.7,1734.3 1550.6,1682.0 1552.3,1572.2 1569.1,1530.5 1591.4,1550.2 1586.8,1437.1 1128.2,1439.6 1111.0,1910.8 1559.1,1912.0 1596.0,1912.0 1596.0,1888.0 1599.1,1883.5 1599.1,1879.8 1601.5,1879.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1135.8,1862.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7588832,34.0576231]}},{"type":"Feature","properties":{"resourceCoords":[1569.1,1862.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7566988,34.0576517]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Pomona, California | 1887 | sanborn00768_002 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T05:02:28Z","modified":"2026-10-17T05:02:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.8,1912.0 171.2,1912.0 173.3,1848.7 1551.0,1845.6 1565.3,168.6 1475.5,79.9 1132.8,82.5 1129.5,1.0 1090.5,1.0 1089.5,147.2 600.7,147.7 125.6,146.6 93.2,217.8 57.1,1487.8 104.8,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd436m:g4364m:g4364pm:g4364pm_g007681887:00768_1887-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[595.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7555838,34.0567997]}},{"type":"Feature","properties":{"resourceCoords":[121.0,1584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.7556206,34.0576955]}}]}}]}