{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02621_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Creston, Iowa | 1886 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"8"},{"label":"placed","value":"5"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 3, georef-snap 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 6 panels"},{"label":"unplaced pages","value":"p1__2 (tier 1, 41.05990,-94.36570 +/-108m); p4__3 (tier 4, 41.05716,-94.36330 +/-369m); p4__4 (tier 4, 41.05716,-94.36330 +/-369m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Creston, Iowa | 1886 | sanborn02621_001 p1 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"},{"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":"2026-09-22T08:40:55Z","modified":"2026-09-22T08:40:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1609.6,1101.4 1533.9,1095.5 1406.3,987.5 1373.0,901.8 1385.8,140.0 854.6,129.6 853.6,557.8 736.6,558.8 736.1,594.9 -0.0,583.5 -0.0,1913.0 1613.0,1913.0 1609.6,1101.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[88.0,585.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3650119,41.0585174]}},{"type":"Feature","properties":{"resourceCoords":[725.0,1863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3681571,41.0572865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Creston, Iowa | 1886 | sanborn02621_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T08:40:55Z","modified":"2026-09-22T08:40:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1555.2,0.0 1542.9,1863.5 1494.5,1863.6 1494.4,1909.2 572.8,1913.0 573.5,1858.3 98.3,1855.8 104.1,1112.7 -0.0,1113.5 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.36528872551075,41.06074372733976]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.36134982283154,41.06076882663331]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.3613106218014,41.05722150576385]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.3652495244806,41.057196406470304]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Creston, Iowa | 1886 | sanborn02621_001 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T08:40:55Z","modified":"2026-09-22T08:40:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"48.5,1867.3 58.9,2.3 1613.0,0.0 1613.0,1913.0 -0.0,1913.0 -0.0,1867.4 48.5,1867.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.36163480389051,41.060771385971975]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.35769885673717,41.06079350884592]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.35766430438287,41.05724885064286]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-94.3616002515362,41.057226727768914]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Creston, Iowa | 1886 | sanborn02621_001 p4 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"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":"2919.6"}],"created":"2026-09-22T08:40:55Z","modified":"2026-09-22T08:40:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,683.8 -0.0,729.9 439.0,725.9 1613.0,714.4 1613.0,0.0 85.3,0.0 87.5,684.0 -0.0,683.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1522.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3602451,41.0561122]}},{"type":"Feature","properties":{"resourceCoords":[84.0,77.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3638557,41.0561019]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Creston, Iowa | 1886 | sanborn02621_001 p4 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2857.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4794.4"}],"created":"2026-09-22T08:40:55Z","modified":"2026-09-22T08:40:55Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 694.0,1913.0 968.0,1913.0 1087.6,1913.0 1089.4,1371.4 1515.5,1370.8 1511.0,765.4 751.1,763.2 666.1,797.6 560.3,926.4 555.5,1001.9 440.8,1004.0 442.5,1279.1 0.0,1288.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154cm:g026211886:02621_1886-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[135.0,1722.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.367274,41.054301]}},{"type":"Feature","properties":{"resourceCoords":[1511.0,765.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-94.3638557,41.0561019]}}]}}]}