{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08216_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Centerville, South-Dakota | 1904 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"7"},{"label":"placed","value":"3"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef 3"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 7 panels"},{"label":"unplaced pages","value":"p1__3 (tier 4, 43.11679,-96.96027 +/-211m); p1__4 (tier 4, 43.11679,-96.96027 +/-211m); p2__2 (tier 2, 43.11735,-96.96099 +/-100m); p2__3 (tier 2, 43.11735,-96.96099 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centerville, South-Dakota | 1904 | sanborn08216_003 p1 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.71"},{"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":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-18T06:14:55Z","modified":"2026-10-18T06:14:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"281.7,75.7 71.2,102.3 101.6,447.7 202.6,577.6 268.1,579.9 302.5,580.0 302.5,581.0 307.9,581.2 313.3,834.4 394.6,837.2 478.4,837.8 478.4,840.0 481.8,840.1 479.5,980.0 480.6,1113.1 481.4,1220.5 475.6,1226.5 129.1,1291.9 129.8,1474.7 523.5,1677.8 527.1,1776.3 835.0,1814.9 875.0,1879.5 1580.0,1812.2 1580.6,146.8 1591.2,135.2 849.1,117.2 281.0,102.0 281.7,75.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1390.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.959767,43.116126]}},{"type":"Feature","properties":{"resourceCoords":[281.0,102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.9627353,43.1171649]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centerville, South-Dakota | 1904 | sanborn08216_003 p1 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.64"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2316.0"},{"label":"split_canvas_w","value":"1210.0"},{"label":"split_canvas_h","value":"1030.0"}],"created":"2026-10-18T06:14:55Z","modified":"2026-10-18T06:14:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.5,817.8 292.5,603.1 1.0,584.7 1.0,631.7 4.0,828.1 289.5,817.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,579.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.95855696446611,43.11656764295292]}},{"type":"Feature","properties":{"resourceCoords":[302.5,579.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.95777329392025,43.11657560255911]}},{"type":"Feature","properties":{"resourceCoords":[302.5,836.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.95776398474999,43.116090351500006]}},{"type":"Feature","properties":{"resourceCoords":[0.0,836.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.95854765529585,43.11608239189382]}},{"type":"Feature","properties":{"resourceCoords":[85.2,808.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.9583281,43.1161375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Centerville, South-Dakota | 1904 | sanborn08216_003 p2 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.66"},{"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":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-18T06:14:55Z","modified":"2026-10-18T06:14:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1060.0,182.1 1060.0,266.6 1059.9,266.6 1025.9,273.8 751.4,271.6 659.4,32.5 233.2,29.2 66.6,92.8 46.1,1782.9 103.2,1862.8 1215.4,1886.0 1297.5,1554.4 1463.6,1555.7 1493.9,1538.0 1511.4,1556.4 1501.6,1492.2 1528.7,1492.3 1528.9,907.9 1527.5,144.4 1439.2,67.6 1201.0,44.0 1084.9,115.3 1060.0,182.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd418m:g4184m:g4184cm:g082161904:08216_1904-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[948.0,337.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.9597912,43.1182663]}},{"type":"Feature","properties":{"resourceCoords":[948.0,1491.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.9627437,43.1182493]}}]}}]}