{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04810_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"O'Fallon, Missouri | 1912 | 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":"9"},{"label":"placed","value":"3"},{"label":"unplaced","value":"6"},{"label":"fit sources","value":"georef 3"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 9 panels"},{"label":"unplaced pages","value":"p1__3 (tier 4, 38.81062,-90.70056 +/-273m); p1__4 (tier 4, 38.81062,-90.70056 +/-273m); p1__5 (tier 4, 38.81062,-90.70056 +/-273m); p1__6 (tier 4, 38.81062,-90.70056 +/-273m); p1__7 (tier 4, 38.81062,-90.70056 +/-273m); p1__8 (tier 4, 38.81062,-90.70056 +/-273m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_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":"O'Fallon, Missouri | 1912 | sanborn04810_001 p1 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.67"},{"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":"2816.0"},{"label":"split_canvas_h","value":"1332.8"}],"created":"2026-10-18T05:51:58Z","modified":"2026-10-18T05:51:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"679.9,307.0 674.1,64.0 545.6,101.2 466.0,23.3 359.4,103.3 29.1,35.2 25.2,329.0 354.1,268.1 679.9,307.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.70153894459469,38.813388527040225]}},{"type":"Feature","properties":{"resourceCoords":[704.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.69983748846597,38.81337400887678]}},{"type":"Feature","properties":{"resourceCoords":[704.0,333.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.6998462971929,38.81274658298199]}},{"type":"Feature","properties":{"resourceCoords":[0.0,333.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.70154775332162,38.81276110114543]}},{"type":"Feature","properties":{"resourceCoords":[680.0,246.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.699902,38.812911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"O'Fallon, Missouri | 1912 | sanborn04810_001 p1 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.56"},{"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":"2026-10-18T05:51:58Z","modified":"2026-10-18T05:51:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1239.0,1521.3 1239.0,1519.5 1324.8,1519.5 1583.0,1514.1 1575.6,1063.1 1317.0,1060.0 1288.7,1032.0 1250.8,467.0 1159.0,547.2 707.9,547.5 706.0,541.5 704.0,541.5 704.0,535.1 640.0,333.8 67.2,336.1 81.2,1187.9 309.2,1250.9 324.0,1251.0 324.0,1255.0 325.8,1255.5 385.9,1870.2 973.0,1867.8 1129.2,1786.5 1127.6,1686.2 1199.0,1670.8 1239.0,1521.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[717.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.6999529,38.8097788]}},{"type":"Feature","properties":{"resourceCoords":[717.0,1857.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.699976,38.8086823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__9/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"O'Fallon, Missouri | 1912 | sanborn04810_001 p1 [9]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.52"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6308.0"},{"label":"split_canvas_w","value":"1296.0"},{"label":"split_canvas_h","value":"1344.0"}],"created":"2026-10-18T05:51:58Z","modified":"2026-10-18T05:51:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__9/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"171.5,1635.9 121.8,1665.2 6.0,1580.8 3.4,1910.2 318.5,1905.9 307.1,1598.2 142.4,1600.5 171.5,1635.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd416m:g4164m:g4164om:g4164om_g048101912:04810_1912-0001__9/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1577.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.70165691047829,38.80872895677035]}},{"type":"Feature","properties":{"resourceCoords":[324.0,1577.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.70087388095591,38.808720570142434]}},{"type":"Feature","properties":{"resourceCoords":[324.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.7008850370337,38.80808751358387]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.70166806655608,38.80809590021179]}},{"type":"Feature","properties":{"resourceCoords":[82.0,1600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.7014595,38.8086835]}}]}}]}