{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn02613_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Columbus Junction, Iowa | 1935 | 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":"6"},{"label":"placed","value":"4"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 4"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 41.27402,-91.36123 +/-258m); p4__1 (tier 4, 41.26905,-91.36817 +/-1391m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbus Junction, Iowa | 1935 | sanborn02613_006 p2","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-22T09:01:17Z","modified":"2026-09-22T09:01:17Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0002/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,6833.7 -0.0,6844.5 -0.0,-0.0 6452.0,0.0 6452.0,6833.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2232.0,4368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.361725,41.280115]}},{"type":"Feature","properties":{"resourceCoords":[4176.0,4368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.36051,41.280102]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbus Junction, Iowa | 1935 | sanborn02613_006 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-22T09:01:17Z","modified":"2026-09-22T09:01:17Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0003/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"280.7,400.9 6452.0,418.9 6452.0,7652.0 -0.0,7652.0 -0.0,-0.0 282.6,0.0 280.7,400.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2560.0,6208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.361778,41.276278]}},{"type":"Feature","properties":{"resourceCoords":[2560.0,408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.3617449,41.2789525]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbus Junction, Iowa | 1935 | sanborn02613_006 p4 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"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":"2026-09-22T09:01:17Z","modified":"2026-09-22T09:01:17Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3379.2,7652.0 3383.2,6275.6 4207.2,6269.6 4210.0,7652.0 6452.0,7652.0 6452.0,-0.0 1010.0,0.0 1001.6,1271.6 0.0,1281.6 -0.0,3910.7 219.6,3907.0 217.5,4736.3 -0.0,4740.0 0.0,6560.0 -0.0,7652.0 3379.2,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2524.0,3968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.3750608,41.2587538]}},{"type":"Feature","properties":{"resourceCoords":[4840.0,3968.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.3750848,41.2576559]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Columbus Junction, Iowa | 1935 | sanborn02613_006 p4 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3379.2"},{"label":"split_canvas_y","value":"6269.6"},{"label":"split_canvas_w","value":"830.8"},{"label":"split_canvas_h","value":"1382.4"}],"created":"2026-09-22T09:01:17Z","modified":"2026-09-22T09:01:17Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4209.5,7409.0 4207.2,6269.6 3383.2,6275.6 3380.0,7392.7 4209.5,7409.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154cm:g026131935:02613_1935-0004__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3379.2,6269.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.37552134863324,41.26038190308648]}},{"type":"Feature","properties":{"resourceCoords":[4210.0,6269.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.37499879583379,41.26038206977272]}},{"type":"Feature","properties":{"resourceCoords":[4210.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.37499842901369,41.25973128646527]}},{"type":"Feature","properties":{"resourceCoords":[3379.2,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.37552098181314,41.25973111977903]}},{"type":"Feature","properties":{"resourceCoords":[4110.6,7408.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.375061,41.259846]}}]}}]}