{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02743_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mason City, Iowa | 1892 | mapsnap generated fit (2026-10-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-22"},{"label":"run","value":"corpus-v2.1"},{"label":"pages","value":"16"},{"label":"placed","value":"2"},{"label":"unplaced","value":"14"},{"label":"fit sources","value":"georef 1, snap:1 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"4 sheet(s) cut into 14 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 43.15505,-93.20258 +/-167m); p1__2 (tier 4, 43.15505,-93.20258 +/-167m); p1__3 (tier 4, 43.15505,-93.20258 +/-167m); p1__4 (tier 4, 43.15505,-93.20258 +/-167m); p1__5 (tier 4, 43.15505,-93.20258 +/-167m); p1__6 (tier 4, 43.15505,-93.20258 +/-167m); p2 (tier 4, 43.15505,-93.20258 +/-167m); p3__1 (tier 1, 43.15853,-93.20346 +/-260m); p3__2 (tier 4, 43.15505,-93.20258 +/-167m); p3__3 (tier 4, 43.15505,-93.20258 +/-167m); p4__1 (tier 4, 43.15505,-93.20258 +/-167m); p6__1 (tier 4, 43.15505,-93.20258 +/-167m); p6__2 (tier 4, 43.15505,-93.20258 +/-167m); p6__3 (tier 4, 43.15505,-93.20258 +/-167m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mason City, Iowa | 1892 | sanborn02743_003 p4 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.16"},{"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":"2026-10-22T13:31:21Z","modified":"2026-10-22T13:31:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1555.8,1860.7 1569.5,64.8 1495.2,33.9 58.8,58.8 53.3,1611.7 306.9,1619.8 384.9,1710.5 385.1,1732.5 385.4,1756.2 385.6,1773.4 436.2,1872.0 1555.8,1860.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1528.0,1344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.2043296,43.1554131]}},{"type":"Feature","properties":{"resourceCoords":[111.0,1344.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.2043047,43.1572226]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mason City, Iowa | 1892 | sanborn02743_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.22"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:31:21Z","modified":"2026-10-22T13:31:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.3,588.9 92.7,152.4 723.3,29.1 1430.6,75.0 1530.7,435.6 1544.2,1764.8 76.5,1726.6 54.3,588.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027431892:02743_1892-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.20289561315896,43.15498518429822]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.20011056256786,43.154964389146116]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.20014413396723,43.15253785196264]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.20292918455833,43.152558647114745]}}]}}]}