{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02812_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Roland, Iowa | 1916 | 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":"6"},{"label":"placed","value":"2"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p1__2 (tier 4, 42.16648,-93.50005 +/-192m); p1__3 (tier 4, 42.16648,-93.50005 +/-192m); p1__4 (tier 4, 42.16648,-93.50005 +/-192m); p1__5 (tier 4, 42.16648,-93.50005 +/-192m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Roland, Iowa | 1916 | sanborn02812_001 p1 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.65"},{"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":"2026-10-18T06:05:58Z","modified":"2026-10-18T06:05:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"26.1,1841.2 1127.4,1861.7 1121.8,1185.3 1290.2,1103.8 1355.5,933.8 1355.5,917.4 1361.8,917.2 1362.2,916.4 1606.3,905.5 1568.3,33.5 1205.3,63.9 717.9,16.0 368.5,81.4 34.5,35.5 26.1,1841.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1133.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.499076,42.16774]}},{"type":"Feature","properties":{"resourceCoords":[53.0,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.501933,42.169978]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__6/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Roland, Iowa | 1916 | sanborn02812_001 p1 [6]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.42"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"5268.0"},{"label":"split_canvas_y","value":"6002.0"},{"label":"split_canvas_w","value":"1184.0"},{"label":"split_canvas_h","value":"1650.0"}],"created":"2026-10-18T06:05:58Z","modified":"2026-10-18T06:05:58Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__6/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1340.1,1744.4 1341.6,1899.7 1592.0,1899.1 1591.2,1519.8 1528.8,1586.3 1382.7,1579.6 1403.8,1718.7 1340.1,1744.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154rm:g028121916:02812_1916-0001__6/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1317.0,1500.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.50055104755921,42.165152531804175]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1500.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.4997766070626,42.165151287120764]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.4997789369571,42.1643512725382]}},{"type":"Feature","properties":{"resourceCoords":[1317.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.50055337745371,42.16435251722161]}},{"type":"Feature","properties":{"resourceCoords":[1341.9,1525.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.500486,42.165104]}}]}}]}