{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02790_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ottumwa, Iowa | 1891 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"24"},{"label":"placed","value":"16"},{"label":"unplaced","value":"8"},{"label":"fit sources","value":"georef 14, georef-snap 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 17 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 41.01626,-92.41129 +/-260m); p10__1 (tier 1, 41.00573,-92.39438 +/-266m); p10__2 (tier 1, 41.01242,-92.40859 +/-100m); p12__1 (tier 1, 41.00499,-92.42477 +/-152m); p12__4 (tier 3, 41.01078,-92.41841 +/-1231m); p12__5 (tier 1, 41.00514,-92.42494 +/-100m); p3__3 (tier 1, 41.02096,-92.41981 +/-100m); p9__4 (tier 1, 41.01101,-92.40191 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p11 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3332.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"624.0,1913.0 833.0,1913.0 815.2,214.0 145.6,389.6 43.5,-0.0 0.0,-0.0 -0.0,1913.0 212.9,1913.0 366.3,1618.8 415.1,1644.3 416.7,1739.0 604.0,1913.0 624.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[405.0,374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4199098,41.0084531]}},{"type":"Feature","properties":{"resourceCoords":[405.0,1054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.421105,41.007613]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p11 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"3252.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3200.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 813.0,-0.0 833.0,1913.0 855.0,1913.0 1613.0,1913.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0011__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1256.5,979.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4180724,41.0098674]}},{"type":"Feature","properties":{"resourceCoords":[1338.3,405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.417087,41.010739]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p12 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2569.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2378.8"},{"label":"split_canvas_h","value":"2383.6"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"920.5,0.0 933.0,23.9 825.7,79.8 695.4,44.0 671.5,0.0 642.4,0.0 647.7,595.9 989.5,593.4 905.2,443.9 934.1,389.1 1141.5,446.1 1064.0,592.9 1237.1,591.6 1233.3,0.0 920.5,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[866.3,369.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.423513,41.005889]}},{"type":"Feature","properties":{"resourceCoords":[695.4,44.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.42229,41.006751]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p12 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"4933.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1518.8"},{"label":"split_canvas_h","value":"2366.4"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,358.4 1613.0,244.3 1347.7,73.6 1487.2,-0.0 1233.3,-0.0 1236.1,439.6 1613.0,358.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1233.3,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42459164895392,41.00508852239543]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42438700562687,41.005791930386145]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,591.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42293471658569,41.00555136782133]}},{"type":"Feature","properties":{"resourceCoords":[1233.3,591.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42313935991274,41.00484795983062]}},{"type":"Feature","properties":{"resourceCoords":[1257.3,2.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.424573,41.005132]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__6/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p12 [6]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5148.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"2504.0"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__6/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"123.0,1795.2 1590.6,1795.0 1590.0,1913.0 1613.0,1913.0 1613.0,1304.5 1272.4,1301.1 995.9,1297.9 123.0,1313.4 123.0,1795.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0012__6/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1439.0,1795.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4082974,41.0178497]}},{"type":"Feature","properties":{"resourceCoords":[123.0,1795.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4106647,41.0195696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 1613.0,-0.0 1613.0,561.3 1379.8,560.9 1369.7,1739.5 1613.0,1740.7 1613.0,1913.0 -0.0,1913.0 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42126598135927,41.026558316988286]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4183255223965,41.0244178059774]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42166688592363,41.02176826850272]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4246073448864,41.023908779513604]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p3 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"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":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1189.0 245.4,1189.8 246.1,1270.4 609.1,1274.5 609.0,1411.0 1009.3,1411.7 1009.5,1913.0 1209.0,1913.0 1495.0,1913.0 1613.0,1913.0 1613.0,1496.0 1392.5,1495.5 1396.2,-0.0 -0.0,0.0 -0.0,1189.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__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":[-92.41973032824569,41.02395043787335]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.41681950515012,41.02182431233662]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42016127979036,41.01921942609311]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.42307210288594,41.02134555162984]}},{"type":"Feature","properties":{"resourceCoords":[1547.0,339.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4175308,41.0214497]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p3 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5070.4"},{"label":"split_canvas_w","value":"2436.4"},{"label":"split_canvas_h","value":"2581.6"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 608.6,1913.0 609.0,1411.0 609.1,1274.5 0.0,1267.6 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1267.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40709262803557,41.01096556544236]}},{"type":"Feature","properties":{"resourceCoords":[609.1,1267.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40598002530272,41.0101735697071]}},{"type":"Feature","properties":{"resourceCoords":[609.1,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40709341121256,41.009283041469104]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4082060139454,41.010075037204366]}},{"type":"Feature","properties":{"resourceCoords":[433.1,1311.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4063774,41.0103418]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p4","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"4"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 -0.0,0.0 1456.6,-0.0 1445.1,785.8 1613.0,784.5 1613.0,1913.0 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[148.0,286.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.416652,41.0221332]}},{"type":"Feature","properties":{"resourceCoords":[1457.0,286.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4142482,41.0203693]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p5","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"18"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"159.8,1718.2 148.9,913.5 -0.0,921.0 -0.0,0.0 1438.6,-0.0 1454.5,479.5 1312.5,482.0 1323.5,864.2 1459.6,859.9 1447.1,1255.9 1489.9,1913.0 336.6,1913.0 330.9,1712.1 159.8,1718.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[823.0,1186.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.413043,41.0194946]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4106647,41.0195696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1499.2 137.1,1502.2 113.1,839.5 137.2,440.9 -0.0,442.4 -0.0,57.2 1613.0,40.9 1613.0,528.2 1459.4,529.0 1463.5,1871.7 1513.0,1913.0 -0.0,1913.0 -0.0,1499.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4108185783563,41.019836497348585]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40795341871893,41.017707000204815]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.41127725190809,41.015125049944466]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.41414241154546,41.017254547088235]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p7","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"169.7,1331.8 163.1,-0.0 1380.6,-0.0 1382.6,210.2 1495.9,208.8 1498.2,710.0 1375.8,709.2 1391.0,1913.0 -0.0,1913.0 -0.0,1371.8 218.9,1373.0 169.7,1331.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[829.0,204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4083047,41.0160369]}},{"type":"Feature","properties":{"resourceCoords":[160.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4103963,41.0162349]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p8","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,94.3 1613.0,97.9 1613.0,1913.0 -0.0,1913.0 -0.0,94.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40804381456758,41.01475603759775]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40510783415372,41.01264969880028]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40841850864379,41.01002229935341]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.41135448905764,41.01212863815088]}},{"type":"Feature","properties":{"resourceCoords":[794.0,102.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4067751,41.0135791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p9 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3394.8"},{"label":"split_canvas_h","value":"2295.2"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 0.0,566.3 847.4,573.8 848.7,0.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__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":[-92.40134262644196,41.01499358617082]}},{"type":"Feature","properties":{"resourceCoords":[848.7,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4013369619431,41.01660256398902]}},{"type":"Feature","properties":{"resourceCoords":[848.7,573.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.39989530505434,41.01659967425385]}},{"type":"Feature","properties":{"resourceCoords":[0.0,573.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.3999009695532,41.014990696435646]}},{"type":"Feature","properties":{"resourceCoords":[71.0,405.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4003237,41.0151261]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p9 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3389.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3062.4"},{"label":"split_canvas_h","value":"2432.8"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"848.7,0.0 847.4,573.8 847.4,599.0 1613.0,608.2 1613.0,0.0 848.7,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[847.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40771502594593,41.023939309378164]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40771378355956,41.022487623747516]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,608.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.40924083982843,41.022486879660306]}},{"type":"Feature","properties":{"resourceCoords":[847.4,608.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.4092420822148,41.023938565290955]}},{"type":"Feature","properties":{"resourceCoords":[1145.2,453.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4088523,41.023374]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ottumwa, Iowa | 1891 | sanborn02790_002 p9 [3]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2265.2"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5386.8"}],"created":"2026-09-23T01:27:43Z","modified":"2026-09-23T01:27:43Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,1121.2 846.1,1111.6 847.4,599.0 847.4,573.8 0.0,566.3 -0.0,1296.3 114.1,1296.0 111.5,1800.5 1610.8,1797.5 1612.0,1121.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154om:g027901891:02790_1891-0009__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[787.0,1804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4067751,41.0135791]}},{"type":"Feature","properties":{"resourceCoords":[787.0,1296.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.4058983,41.0142708]}}]}}]}