{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02562_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alta, Iowa | 1933 | 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":"5"},{"label":"placed","value":"3"},{"label":"unplaced","value":"2"},{"label":"fit sources","value":"georef 3"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p1__2 (tier 4, 42.67315,-95.30532 +/-420m); p3__2 (tier 1, 42.67232,-95.30402 +/-102m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alta, Iowa | 1933 | sanborn02562_001 p1 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"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":"2026-09-22T02:52:21Z","modified":"2026-09-22T02:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1004.9,1913.0 1004.5,1841.7 1221.2,1843.8 1361.8,1850.2 1502.4,1848.5 1505.7,1237.9 1457.5,1229.5 1456.5,955.0 672.7,955.0 670.2,0.0 -0.0,-0.0 -0.0,1913.0 1004.9,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1221.0,1560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.306671,42.673597]}},{"type":"Feature","properties":{"resourceCoords":[183.0,1560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.311876,42.673642]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alta, Iowa | 1933 | sanborn02562_001 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-22T02:52:21Z","modified":"2026-09-22T02:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"95.3,591.9 -0.0,575.0 -0.0,12.8 309.0,70.4 309.2,0.0 1613.0,0.0 1613.0,1820.2 81.2,1798.2 95.3,591.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[80.0,1234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.305277,42.673574]}},{"type":"Feature","properties":{"resourceCoords":[1533.0,1234.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.301589,42.673551]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alta, Iowa | 1933 | sanborn02562_001 p3 [1]","metadata":[{"label":"streets","value":"8"},{"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":"2026-09-22T02:52:21Z","modified":"2026-09-22T02:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"899.1,1913.0 898.9,1295.3 1613.0,1295.3 1613.0,0.0 1295.8,0.0 1295.5,145.7 1250.3,147.0 -0.0,123.2 -0.0,1913.0 899.1,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154am:g025621933:02562_1933-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[505.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.3053067,42.6704607]}},{"type":"Feature","properties":{"resourceCoords":[729.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.3042044,42.6704554]}}]}}]}