{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02873_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Williamsburg, Iowa | 1895 | 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":"5"},{"label":"placed","value":"3"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p2__3 (tier 2, 41.66120,-92.00729 +/-100m); p2__4 (tier 2, 41.66120,-92.00729 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Williamsburg, Iowa | 1895 | sanborn02873_001 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T20:54:46Z","modified":"2026-10-18T20:54:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1514.1,582.7 1612.0,582.5 1612.0,1014.0 1573.9,1169.0 1524.6,1169.3 1575.2,1330.7 1594.3,1330.7 1612.0,1374.9 1612.0,1726.9 1515.2,1726.9 1507.1,1859.5 1088.8,1804.8 621.9,1877.5 86.7,1871.6 8.5,1463.5 50.2,1389.0 9.4,276.2 41.0,256.6 75.3,32.4 1240.3,19.3 1511.9,33.1 1557.6,90.4 1578.0,38.5 1586.8,156.9 1511.5,157.1 1514.1,582.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1501.0,588.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.00743070660808,41.66174894821067]}},{"type":"Feature","properties":{"resourceCoords":[1501.0,1738.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.00751593422555,41.65963230606686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Williamsburg, Iowa | 1895 | sanborn02873_001 p2 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.77"},{"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":"1748.0"},{"label":"split_canvas_h","value":"1296.4"}],"created":"2026-10-18T20:54:46Z","modified":"2026-10-18T20:54:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"436.0,141.0 436.0,140.3 373.8,143.0 369.8,45.0 236.5,42.5 233.1,80.7 3.1,60.6 14.3,317.6 415.4,155.8 436.0,141.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__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":[-92.00765616827404,41.65898157948604]}},{"type":"Feature","properties":{"resourceCoords":[437.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.00757827287086,41.65978155669399]}},{"type":"Feature","properties":{"resourceCoords":[437.0,324.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.00678407853029,41.659738425666745]}},{"type":"Feature","properties":{"resourceCoords":[0.0,324.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.00686197393347,41.65893844845879]}},{"type":"Feature","properties":{"resourceCoords":[370.0,45.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.00748,41.659652]}},{"type":"Feature","properties":{"resourceCoords":[370.0,45.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.00748,41.659652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Williamsburg, Iowa | 1895 | sanborn02873_001 p2 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.92"},{"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":"2026-10-18T20:54:46Z","modified":"2026-10-18T20:54:46Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.3,669.0 48.9,1695.4 132.5,1803.2 198.4,1801.4 250.8,1836.7 374.4,1796.7 787.1,1866.1 1535.7,1875.2 1588.1,1374.9 1528.8,894.8 1269.7,894.8 1010.7,1063.0 911.5,1064.1 911.5,1064.1 911.5,901.0 911.5,798.5 1066.5,798.5 1144.8,798.5 1543.2,798.5 1598.7,685.0 1548.9,202.2 1562.2,150.5 1612.0,147.0 1612.0,71.6 1186.0,73.0 1185.9,172.0 1144.8,171.9 1144.8,577.0 947.9,577.0 805.5,577.0 805.5,577.0 805.5,577.0 805.5,182.6 598.9,131.1 598.7,81.8 437.0,131.9 437.0,148.4 437.0,151.1 68.8,296.9 28.3,669.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154wm:g028731895:02873_1895-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1183.0,1205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.004612,41.661696]}},{"type":"Feature","properties":{"resourceCoords":[1186.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.007398,41.661758]}}]}}]}