{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02828_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Sigourney, Iowa | 1899 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"10"},{"label":"placed","value":"5"},{"label":"unplaced","value":"5"},{"label":"fit sources","value":"georef 3, georef-snap 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 41.33292,-92.20488 +/-378m); p1__2 (tier 4, 41.33292,-92.20488 +/-378m); p1__3 (tier 4, 41.33292,-92.20488 +/-378m); p1__4 (tier 4, 41.33292,-92.20488 +/-378m); p1__6 (tier 4, 41.33292,-92.20488 +/-378m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0001__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Sigourney, Iowa | 1899 | sanborn02828_004 p1 [5]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.71"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3490.0"},{"label":"split_canvas_y","value":"5962.0"},{"label":"split_canvas_w","value":"1674.4"},{"label":"split_canvas_h","value":"1690.0"}],"created":"2026-10-19T21:42:45Z","modified":"2026-10-19T21:42:45Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0001__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1277.5,1623.8 1248.1,1626.4 1239.7,1597.5 1277.5,1510.9 1214.4,1490.5 920.5,1490.5 875.3,1891.8 1284.6,1906.0 1277.5,1623.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0001__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[872.5,1490.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.20399168767787,41.330101946298385]}},{"type":"Feature","properties":{"resourceCoords":[1291.1,1490.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.2029261475916,41.33010190795575]}},{"type":"Feature","properties":{"resourceCoords":[1291.1,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.20292619912819,41.32929394995588]}},{"type":"Feature","properties":{"resourceCoords":[872.5,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.20399173921446,41.32929398829852]}},{"type":"Feature","properties":{"resourceCoords":[909.5,1534.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2038976,41.3300179]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Sigourney, Iowa | 1899 | sanborn02828_004 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:42:45Z","modified":"2026-10-19T21:42:45Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.8,178.1 164.7,42.2 1389.5,29.6 1528.8,99.5 1565.8,154.4 1559.2,356.5 1554.2,826.2 1564.1,1332.7 1575.8,1830.8 1061.1,1824.1 783.6,1823.6 562.5,1826.9 50.8,1817.0 42.8,178.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[562.0,345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.20771192311807,41.33650837318581]}},{"type":"Feature","properties":{"resourceCoords":[1543.0,822.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.20524972260479,41.33561267991669]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Sigourney, Iowa | 1899 | sanborn02828_004 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:42:45Z","modified":"2026-10-19T21:42:45Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.2,106.4 235.3,20.1 993.7,68.2 1222.5,24.7 1372.7,38.6 1530.4,138.3 1604.9,1723.4 1605.8,1826.0 1353.5,1825.5 1098.8,1828.3 846.2,1825.8 596.9,1829.6 113.9,1826.1 100.2,1328.7 88.2,823.0 91.3,353.9 97.1,152.0 60.0,97.4 78.2,106.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1093.0,819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.20269823476409,41.33560729028532]}},{"type":"Feature","properties":{"resourceCoords":[605.0,819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.20392383935507,41.33560972116305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Sigourney, Iowa | 1899 | sanborn02828_004 p4","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:42:45Z","modified":"2026-10-19T21:42:45Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"538.7,112.5 758.5,106.5 1034.7,103.7 1546.8,104.1 1552.1,599.6 1548.6,1096.7 1555.5,1567.2 1563.5,1889.0 59.0,1841.8 29.5,108.8 538.7,112.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1050.0,605.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2064297,41.332775]}},{"type":"Feature","properties":{"resourceCoords":[1050.0,1103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2064431,41.3318324]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Sigourney, Iowa | 1899 | sanborn02828_004 p5","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:42:45Z","modified":"2026-10-19T21:42:45Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"569.6,102.7 815.3,95.3 1064.1,94.2 1315.0,87.7 1563.6,84.5 1567.5,84.5 1611.9,803.1 1588.0,1868.0 1157.2,1819.0 932.5,1872.2 930.7,1912.0 641.0,1912.0 643.7,1884.3 122.0,1871.4 112.0,1553.1 102.0,1087.8 102.2,596.2 93.8,106.2 569.6,102.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028281899:02828_1899-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[599.0,1080.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2039193,41.3318328]}},{"type":"Feature","properties":{"resourceCoords":[1573.0,577.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.2014149,41.3327631]}}]}}]}