{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08431_006.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Big Spring, Texas | 1922 | mapsnap generated fit (2026-10-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-20"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"14"},{"label":"placed","value":"11"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef-snap 6, georef 5"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"2 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p4__1 (tier 3, 32.25150,-101.48871 +/-1018m); p4__2 (tier 1, 32.24963,-101.48754 +/-100m); p6 (tier 2, 32.25574,-101.47620 +/-362m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p10","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"44"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000100/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000100","type":"ImageService3","width":2179,"height":2572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"898.5,128.0 1289.3,126.6 1663.5,126.3 2041.2,122.1 2043.8,501.0 2039.2,882.2 2039.5,1282.2 2175.3,1503.3 2174.2,2407.9 2103.8,2393.0 2031.7,2392.6 2032.0,2470.4 1662.0,2448.3 1661.8,2389.1 1279.8,2389.5 1111.2,2395.9 888.0,2401.4 507.6,2402.0 126.9,2410.5 123.6,2027.9 124.6,1651.8 132.8,1270.9 128.8,889.2 128.4,509.4 133.6,199.5 287.0,198.4 511.6,174.2 511.2,125.4 898.5,128.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000100/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1285.0,1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4735615,32.2491226]}},{"type":"Feature","properties":{"resourceCoords":[2037.0,2021.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4702834,32.2481426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000110","type":"ImageService3","width":2183,"height":2588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.4,829.8 52.2,465.6 57.0,75.7 42.8,75.9 200.1,23.7 1284.3,16.8 1652.4,68.7 2116.5,68.5 2155.8,961.0 2118.4,1265.0 2114.5,2518.8 1322.3,2497.3 177.4,2562.3 168.6,2587.0 40.9,2379.9 39.5,1979.2 43.3,1597.2 39.8,1217.6 49.4,829.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[803.0,1592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.47020680184552,32.252827477449614]}},{"type":"Feature","properties":{"resourceCoords":[1942.0,459.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.46847463165149,32.25698371093423]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000120/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000120/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000120","type":"ImageService3","width":2188,"height":2573},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"368.4,345.1 1.0,431.6 1.0,478.2 37.4,660.8 33.4,661.6 55.4,1016.2 39.9,1273.1 10.1,1282.2 1.0,1929.5 1.0,1943.0 16.8,2043.4 40.0,2057.7 63.8,2496.4 327.4,2551.4 646.2,2507.1 756.3,2539.5 1982.8,2540.2 2038.5,2564.2 2038.4,2572.0 2050.2,2572.0 2131.0,2270.5 2093.9,2270.9 2112.5,1892.5 2175.6,1891.3 2167.1,1521.3 2164.8,1144.3 2109.7,1145.2 2078.8,755.1 2046.7,755.6 2041.8,735.2 2105.0,364.5 2186.5,346.5 2170.1,1.0 2170.1,1.0 2174.5,334.4 2128.6,333.4 2124.3,80.8 2034.8,48.4 2024.8,1.0 1946.6,1.0 1879.8,14.7 1896.5,92.0 1524.5,147.9 1511.8,89.2 1132.5,170.0 966.4,211.9 746.0,264.3 368.4,345.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000120/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[760.0,242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.47307730622089,32.24589165837878]}},{"type":"Feature","properties":{"resourceCoords":[1889.0,41.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.46972329906771,32.24715424686572]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000130/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000130/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000130","type":"ImageService3","width":2181,"height":2573},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"220.0,30.5 138.9,47.6 74.6,413.4 79.3,433.6 111.2,433.4 140.4,819.0 195.2,818.6 196.0,1191.1 202.9,1556.7 140.2,1557.4 120.2,1931.1 157.1,1931.0 75.5,2228.3 63.8,2229.2 62.2,2509.4 358.9,2549.1 2096.1,2512.4 2117.7,2405.1 2134.0,2391.9 2150.1,2405.6 2175.9,1.0 2175.9,1.0 2159.7,187.2 2146.6,201.9 2126.8,187.3 2114.6,60.2 1103.0,77.9 220.1,31.7 220.0,30.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000130/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.46927438992505,32.24647749898466]}},{"type":"Feature","properties":{"resourceCoords":[2181.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.46246956810057,32.24794705288822]}},{"type":"Feature","properties":{"resourceCoords":[2181.0,2573.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.46043412984761,32.24110931280926]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2573.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.46723895167209,32.239639758905696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p2","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000020","type":"ImageService3","width":2173,"height":2569},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1135.4,147.5 1136.9,96.7 1268.1,159.5 1744.8,129.6 1882.3,195.4 1889.3,894.6 1882.0,1635.1 1887.2,2407.4 1115.0,2414.0 349.6,2413.1 332.8,167.1 1135.4,147.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1115.0,1651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4768386,32.252416]}},{"type":"Feature","properties":{"resourceCoords":[1115.0,2414.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4762969,32.2514587]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p3","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000030","type":"ImageService3","width":2175,"height":2577},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"358.1,196.2 629.0,105.1 1750.0,149.6 1851.0,114.6 1879.5,113.9 1879.7,895.2 1883.4,1624.9 1874.0,2402.2 1116.0,2422.0 364.9,2434.0 351.9,1649.4 352.0,897.0 337.9,186.7 358.1,196.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[352.0,897.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4762268,32.25383]}},{"type":"Feature","properties":{"resourceCoords":[1116.0,2422.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4740624,32.2523803]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000050","type":"ImageService3","width":2170,"height":2573},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"399.0,2489.7 68.1,2506.2 68.4,2321.5 31.5,2249.5 96.8,1709.7 67.5,1679.4 89.8,1390.9 52.8,1215.6 67.7,91.6 1090.2,94.5 1469.0,46.4 1580.4,88.5 2094.5,66.8 2146.8,635.5 2169.0,2412.0 2169.0,2417.6 2169.0,2488.3 1760.4,2498.0 1384.9,2509.2 1384.9,2516.2 548.7,2497.2 549.2,2550.4 399.0,2489.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.487644508182,32.257926050857115]}},{"type":"Feature","properties":{"resourceCoords":[2170.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.48132344449346,32.26048875390421]}},{"type":"Feature","properties":{"resourceCoords":[2170.0,2573.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.47775544649774,32.25410576698549]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2573.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-101.48407651018628,32.25154306393839]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000070","type":"ImageService3","width":2178,"height":2576},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2134.8,1268.0 2138.7,1994.3 2138.4,2250.2 2119.5,2249.9 2101.7,2575.0 2098.3,2547.4 945.5,2493.7 62.5,2511.8 88.8,2405.3 36.2,2181.7 25.1,750.8 75.2,69.7 248.1,35.4 519.2,81.8 1243.7,60.5 1717.9,95.5 1925.8,44.1 2116.9,60.5 2147.1,878.9 2102.8,1268.2 2134.8,1268.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[631.0,590.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.495100826184,32.24973131797095]}},{"type":"Feature","properties":{"resourceCoords":[267.0,590.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.49623103972216,32.249495108688755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000080/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000080/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000080","type":"ImageService3","width":2177,"height":2572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"44.4,372.0 75.8,372.2 69.1,1082.8 65.1,1333.0 46.7,1332.5 22.4,1681.8 31.4,2392.6 93.8,2520.0 1624.3,2493.3 2016.7,2535.8 2128.4,2494.6 2147.4,2271.2 2050.8,2271.3 2027.7,2154.4 1942.8,2172.0 1831.2,1811.8 1813.2,1815.2 1800.3,1428.0 1882.3,1412.6 1816.0,1043.2 2176.0,970.2 2158.2,614.6 2137.4,628.9 2113.2,593.8 2117.3,60.1 1617.8,60.0 1558.2,94.8 1099.8,34.9 94.0,22.9 92.3,1.0 92.1,1.0 44.4,372.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000080/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1782.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4842606722864,32.24930241212355]}},{"type":"Feature","properties":{"resourceCoords":[2344.0,1754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.48159160534807,32.246825302253626]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p9 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5344.0"},{"label":"split_canvas_w","value":"4998.4"},{"label":"split_canvas_h","value":"4944.0"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090","type":"ImageService3","width":2178,"height":2572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"72.0,2498.8 70.7,2571.0 230.6,2571.0 447.1,2553.1 448.1,2509.2 720.4,2571.0 979.5,2571.0 1203.5,2546.9 1203.1,2498.2 1200.9,1364.6 828.6,1374.0 828.5,1380.9 1.0,1358.0 1.0,2499.1 72.0,2498.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[79.0,1743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4818038,32.2515195]}},{"type":"Feature","properties":{"resourceCoords":[827.7,2499.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4785326,32.2505467]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Big Spring, Texas | 1922 | sanborn08431_006 p9 [2]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.88"},{"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":"8712.0"},{"label":"split_canvas_h","value":"10288.0"}],"created":"2026-10-20T01:21:27Z","modified":"2026-10-20T01:21:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090","type":"ImageService3","width":2178,"height":2572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"633.8,33.5 258.1,39.7 255.7,423.5 170.4,423.6 110.9,815.5 129.7,815.4 174.6,1198.5 263.2,1196.7 264.7,1318.6 358.4,1336.0 396.3,1332.2 1251.4,1332.7 1250.8,1696.7 1319.6,2065.7 1251.1,2292.8 1262.9,2513.5 1839.8,2553.9 2067.0,2528.6 2123.6,2560.8 2126.3,2571.0 2126.6,2338.9 2119.0,1950.0 2115.8,1567.5 2119.9,1180.2 2111.7,792.1 2107.1,405.9 2108.8,114.1 2108.9,90.7 2005.2,91.8 1722.3,30.9 1721.7,75.8 1501.2,96.5 1338.1,98.2 1338.7,24.7 1265.2,25.8 635.2,31.8 633.8,33.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08431006:sb000090__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[619.0,810.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4817581,32.2468879]}},{"type":"Feature","properties":{"resourceCoords":[2119.0,1950.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-101.4758684,32.2458306]}}]}}]}