{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn05017_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Helena, Montana | 1930 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"108"},{"label":"placed","value":"78"},{"label":"unplaced","value":"30"},{"label":"fit sources","value":"georef 41, georef-snap 36, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"21 sheet(s) cut into 51 panels"},{"label":"unplaced pages","value":"p101__2 (tier 1, 46.58864,-112.04364 +/-100m); p101__3 (tier 1, 46.58919,-112.04444 +/-100m); p101__4 (tier 1, 46.60514,-112.04126 +/-100m); p109__1 (tier 1, 46.58516,-112.04543 +/-101m); p109__2 (tier 2, 46.58491,-112.04371 +/-124m); p111__1 (tier 3, 46.58080,-112.04773 +/-526m); p111__2 (tier 1, 46.57976,-112.04931 +/-207m); p112__2 (tier 1, 46.57767,-112.04051 +/-100m); p112__3 (tier 1, 46.57664,-112.04284 +/-100m); p125__2 (tier 1, 46.59814,-112.02929 +/-156m); p140__2 (tier 1, 46.60143,-112.04254 +/-100m); p140__3 (tier 1, 46.60237,-112.04179 +/-100m); p141__2 (tier 1, 46.59790,-112.04163 +/-100m); p143__2 (tier 1, 46.60538,-112.02482 +/-182m); p146__1 (tier 4, 46.59260,-112.03235 +/-3001m); p146__2 (tier 4, 46.59260,-112.03235 +/-3001m); p146__3 (tier 4, 46.59260,-112.03235 +/-3001m); p146__4 (tier 4, 46.59260,-112.03235 +/-3001m); p147__1 (tier 4, 46.59260,-112.03235 +/-3001m); p147__2 (tier 4, 46.59260,-112.03235 +/-3001m); p148__1 (tier 3, 46.61742,-112.05782 +/-526m); p148__2 (tier 1, 46.61632,-112.05657 +/-100m); p148__3 (tier 3, 46.61742,-112.05782 +/-526m); p148__4 (tier 3, 46.61742,-112.05782 +/-526m); p201__1 (tier 1, 46.59078,-112.02577 +/-111m); p203__2 (tier 1, 46.58796,-112.03007 +/-100m); p211__2 (tier 1, 46.58189,-112.03592 +/-100m); p217__1 (tier 1, 46.59776,-112.02127 +/-177m); p217__3 (tier 1, 46.58501,-112.03420 +/-167m); p218__2 (tier 1, 46.58140,-112.00847 +/-117m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0101__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p101 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"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":"6628.0"},{"label":"split_canvas_h","value":"5776.8"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0101__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0101","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.4,1232.7 764.2,1292.2 801.7,1302.7 1179.1,1367.0 1242.1,1240.8 1254.0,1207.5 1496.1,665.4 1540.5,670.7 1534.0,147.0 1179.7,147.1 64.0,147.0 71.5,206.8 43.5,249.7 46.5,479.3 144.9,550.0 149.3,1193.5 302.4,1232.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0101__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[64.0,147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.047052,46.590399]}},{"type":"Feature","properties":{"resourceCoords":[1534.0,147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0432845,46.590443]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p102","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0102/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0102","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1389.2,1813.9 877.6,1577.9 878.9,1573.0 407.2,1680.8 410.6,1662.1 458.9,1490.8 290.1,1392.2 49.0,1232.4 61.2,1199.1 308.9,656.9 353.4,662.6 351.3,136.9 1559.8,147.0 1551.5,522.8 1535.3,960.5 1501.6,1255.0 1457.2,1552.0 1433.8,1658.6 1393.3,1803.5 1389.2,1813.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1154.0,766.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04119480649062,46.58937523162565]}},{"type":"Feature","properties":{"resourceCoords":[1154.0,153.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04123448216413,46.59045048433449]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p103","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0103/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0103","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"308.4,1726.3 314.0,1710.7 350.2,1566.6 370.6,1460.9 406.9,1166.7 432.6,875.2 437.4,442.9 436.0,72.0 1477.0,72.0 1388.0,388.2 1376.7,412.6 1076.7,985.8 1006.0,935.6 627.9,1978.0 491.6,1978.0 543.5,1840.0 308.4,1726.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0103/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[436.0,711.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0402,46.589343]}},{"type":"Feature","properties":{"resourceCoords":[436.0,72.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0401992,46.590479]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0104/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0104","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"933.8,1667.4 792.8,1677.9 657.0,1699.3 348.4,1720.2 327.9,1067.5 325.7,1040.5 247.1,718.2 473.4,607.5 777.1,452.6 1173.2,243.4 1278.0,192.0 1395.2,184.1 1398.3,392.2 1397.2,822.1 1387.3,1214.9 1377.1,1286.2 1376.6,1673.1 933.8,1667.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0104/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1402.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03559057175106,46.58867337939111]}},{"type":"Feature","properties":{"resourceCoords":[1402.0,390.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03451571368898,46.589981402452715]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p105","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.25"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0105/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0105","type":"ImageService3","width":1655,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"645.5,1638.5 547.2,1638.9 315.8,348.0 407.2,356.4 730.8,330.6 872.9,306.5 1020.8,293.7 1485.4,294.2 1486.7,504.4 1493.0,723.0 1493.0,1158.0 1507.3,1632.8 1417.7,1635.2 1076.2,1644.5 672.3,1638.7 645.5,1638.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1493.0,723.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0366988,46.5874069]}},{"type":"Feature","properties":{"resourceCoords":[1493.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0372321,46.5867754]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0106/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p106","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0106/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0106","type":"ImageService3","width":1657,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"546.3,301.8 584.5,307.3 964.1,321.9 1009.8,189.8 1267.6,313.3 1446.3,386.7 1422.4,561.0 1404.9,988.8 1432.5,989.5 1371.8,1978.0 1361.3,1978.0 1306.2,1840.0 988.3,1868.5 585.3,1753.8 129.1,1843.9 89.5,1764.3 132.2,1736.5 148.6,939.5 91.5,303.7 546.3,301.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0106/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[984.0,1004.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04428898957465,46.587076607827456]}},{"type":"Feature","properties":{"resourceCoords":[1403.0,1004.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04321331552694,46.58699252609142]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0107/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p107","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.60"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0107/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0107","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.7,798.9 40.6,398.4 423.4,103.8 424.2,108.7 986.7,109.1 987.1,114.8 1251.0,126.7 1257.8,275.6 1384.5,222.3 1392.0,351.9 1485.2,362.7 1487.5,363.0 1308.0,1269.5 1302.2,1268.0 1249.5,1728.7 803.8,1798.0 781.7,1854.8 645.5,1918.7 405.4,1787.8 170.7,791.5 143.7,798.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0107/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[563.0,678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04209673701662,46.586923140000735]}},{"type":"Feature","properties":{"resourceCoords":[930.0,316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04086876414276,46.5872528834385]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0108/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p108","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.24"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0108/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0108","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"356.6,1146.5 362.4,1147.6 472.9,251.6 495.6,252.9 871.8,276.0 1190.3,282.3 1264.3,283.8 1284.6,1528.0 1265.7,1526.4 1263.2,1601.4 1260.4,1685.8 823.2,1666.6 747.0,1460.1 717.2,1455.4 733.4,1515.6 753.6,1668.9 334.9,1674.8 356.6,1146.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0108/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1274.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.038053,46.585718]}},{"type":"Feature","properties":{"resourceCoords":[1274.0,284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.037784,46.5860741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0110/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p110","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.12"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0110/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0110","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.7,441.5 111.5,386.4 222.3,536.7 57.7,1296.5 62.5,1892.7 98.7,1836.9 329.2,1821.5 865.7,1880.0 1403.2,1821.8 1503.3,1747.9 1571.3,1813.8 1649.0,1763.6 1649.0,1626.0 1640.0,1625.0 1639.0,1515.2 1570.8,1528.0 1473.5,503.1 1480.0,499.0 1435.1,157.2 1434.0,148.1 982.8,199.3 871.7,1.0 840.2,1.0 866.1,59.0 911.8,212.9 483.5,287.0 474.4,208.9 50.4,380.2 41.7,441.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0110/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1480.0,499.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.039939,46.58331]}},{"type":"Feature","properties":{"resourceCoords":[1539.0,872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.040378,46.582729]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0112__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p112 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"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":"6600.0"},{"label":"split_canvas_h","value":"6001.6"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0112__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0112","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.0,108.3 59.2,112.0 34.2,858.8 149.2,1394.5 349.3,1488.2 831.9,1488.6 900.5,1349.7 1068.6,1346.8 1264.0,1247.8 1519.1,1250.7 1602.6,1046.3 1587.2,223.4 1497.5,52.5 1371.8,85.7 1378.8,110.0 976.3,92.5 661.4,89.6 403.9,77.8 403.9,83.5 54.0,108.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0112__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[974.0,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04071271556842,46.57809782918425]}},{"type":"Feature","properties":{"resourceCoords":[424.0,104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04198836422233,46.57846607371088]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0113/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p113","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0113/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0113","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1633.0,329.1 1633.0,310.0 1645.8,309.2 1638.1,286.6 1633.0,285.0 1633.0,271.6 1583.2,124.7 1582.5,140.8 1284.3,114.7 1012.2,98.6 1013.0,69.0 1.0,118.8 1.0,438.4 74.5,1065.4 159.7,1141.3 73.3,1223.5 120.5,1294.0 53.0,1426.9 45.6,1702.0 89.8,1879.2 220.9,1950.3 561.0,1891.0 560.5,1885.4 813.7,1871.2 1122.3,1842.7 1518.2,1819.5 1508.8,1796.4 1628.7,1751.4 1584.5,1684.8 1578.6,358.7 1633.0,329.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0113/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1272.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0382713888685,46.5806211573461]}},{"type":"Feature","properties":{"resourceCoords":[562.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04201401006293,46.57850988333704]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0114/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p114","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0114/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0114","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1086.2,169.5 1089.5,176.3 1427.5,172.8 1405.9,526.7 1415.0,541.7 1391.0,1247.7 1387.2,1247.8 1346.4,1800.8 1560.8,1802.6 1370.4,1911.5 1389.3,1943.1 1138.6,1978.0 935.9,1978.0 840.0,1807.7 381.2,1811.0 227.3,1805.9 84.1,1802.2 105.4,1504.9 117.0,1233.7 146.5,1234.0 80.1,222.6 79.4,211.7 75.0,143.6 1086.2,169.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0114/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[103.0,1510.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0382091055286,46.58063562496029]}},{"type":"Feature","properties":{"resourceCoords":[1396.0,1239.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03717775707665,46.582856038603865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0115/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p115","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0115/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0115","type":"ImageService3","width":1650,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"54.9,1839.8 88.0,1283.4 91.9,1283.2 106.0,573.4 96.8,558.4 114.2,202.5 209.8,200.8 286.8,199.5 286.2,218.9 1558.8,133.5 1559.0,143.4 1544.3,570.6 1549.8,1477.3 1554.0,1834.0 997.4,1839.8 508.9,1837.2 323.8,1838.2 54.9,1839.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0115/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[275.0,587.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.038463,46.5837356]}},{"type":"Feature","properties":{"resourceCoords":[1554.0,1834.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0340643,46.5845673]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0116/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p116","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0116/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0116","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"133.7,1492.7 138.6,598.2 158.0,177.0 606.0,167.0 1016.4,170.2 1222.7,165.8 1421.0,166.2 1425.0,721.1 1420.0,1295.4 1410.0,1684.6 1429.2,1805.7 1451.8,1833.8 1219.8,1841.3 1015.4,1840.6 133.8,1844.6 133.7,1492.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0116/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[606.0,167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0372321,46.5867754]}},{"type":"Feature","properties":{"resourceCoords":[158.0,177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.037784,46.5860741]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0117/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p117","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0117/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0117","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"298.7,1864.6 221.8,1801.9 199.2,1774.1 179.5,1653.6 187.3,1265.8 189.1,693.8 182.0,141.0 563.4,137.9 633.8,147.3 1021.1,153.3 1445.0,150.3 1429.2,709.1 1432.7,1281.7 1428.2,1579.4 1578.3,1838.4 1258.7,1831.5 1002.2,1835.4 976.9,1834.9 606.9,1827.2 464.8,1817.9 325.4,1900.1 298.7,1864.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0117/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[596.0,711.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0343682,46.5881672]}},{"type":"Feature","properties":{"resourceCoords":[182.0,141.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0361892,46.5880359]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0118/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p118","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0118/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0118","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.4,1597.1 90.2,1295.4 77.8,715.1 85.1,148.6 292.9,140.3 936.6,141.6 1499.0,148.0 1505.4,718.1 1496.9,718.1 1514.9,1284.9 1567.2,1284.7 1569.7,1869.3 1036.5,1871.0 828.4,1869.2 246.5,1857.3 90.4,1597.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0118/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[515.0,718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0327078,46.5901163]}},{"type":"Feature","properties":{"resourceCoords":[1499.0,148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.032667,46.59212]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0119/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p119","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0119/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0119","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"784.0,136.0 1465.4,122.9 1469.8,703.8 1474.9,703.7 1491.0,1275.2 1450.9,1275.3 1454.0,1848.0 304.8,1856.2 280.1,1856.7 282.4,1273.5 230.3,1273.3 217.1,707.8 225.5,707.8 223.9,139.0 784.0,136.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0119/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.031945,46.592976]}},{"type":"Feature","properties":{"resourceCoords":[1454.0,1848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.027278,46.592466]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0120/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p120","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0120/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0120","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.7,1280.2 93.3,1279.6 69.3,714.3 64.2,714.5 51.7,139.7 776.3,125.7 1366.3,110.3 1372.9,392.4 1373.0,678.8 1514.1,676.5 1515.0,676.5 1515.1,768.1 1590.0,815.1 1580.9,1239.3 1606.0,1238.8 1537.2,1978.0 1303.8,1978.0 820.0,1878.4 802.7,1818.9 64.8,1847.0 53.7,1280.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0120/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[779.0,289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0297765,46.5949976]}},{"type":"Feature","properties":{"resourceCoords":[791.0,1268.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.027586,46.59411]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0121/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p121","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0121/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0121","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"500.5,1952.7 246.1,1116.4 199.6,978.6 87.7,647.2 79.3,630.6 636.0,102.1 836.1,115.3 1378.2,157.3 1522.3,168.6 1585.2,173.8 1543.9,268.6 1516.8,455.5 1495.1,769.1 1490.0,995.9 1484.5,1494.5 1501.1,1663.7 500.5,1952.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0121/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[654.0,95.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03848264202936,46.59357372630748]}},{"type":"Feature","properties":{"resourceCoords":[995.0,1803.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03886340480092,46.59049029723409]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0122/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p122","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0122/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0122","type":"ImageService3","width":1653,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.1,1772.0 65.5,1271.5 63.7,1043.7 75.9,728.4 97.5,540.0 135.9,443.6 222.6,428.0 305.8,373.9 388.2,294.9 679.8,249.8 672.6,282.6 1600.5,481.4 1468.3,1025.6 1322.8,1649.7 1207.0,1634.0 1094.5,1663.2 666.6,1788.0 339.6,1878.5 97.0,1941.2 75.1,1772.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0122/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[334.0,1868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03686744986071,46.590472618720234]}},{"type":"Feature","properties":{"resourceCoords":[1123.0,357.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03373899424166,46.592588884626664]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0123/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p123","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0123/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0123","type":"ImageService3","width":1639,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"244.3,656.3 348.3,929.8 315.1,929.6 314.0,1871.0 868.6,1872.8 1543.4,1865.8 1545.9,1546.0 1543.3,1386.4 1546.6,937.2 1552.2,451.2 1548.1,81.2 1526.1,80.6 1492.5,143.5 1315.0,62.4 887.3,46.7 863.9,1.0 827.5,1.0 19.5,266.7 38.0,380.3 47.9,442.2 81.0,523.1 150.7,592.6 244.3,656.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0123/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[872.0,1378.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0330542,46.5934214]}},{"type":"Feature","properties":{"resourceCoords":[314.0,1871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.032667,46.59212]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0124/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p124","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0124/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0124","type":"ImageService3","width":1639,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"376.0,73.8 480.7,163.1 736.0,85.8 804.5,143.2 1512.7,85.8 1487.7,347.3 1598.2,918.7 1638.0,940.0 1448.8,937.5 1450.2,1866.2 854.0,1870.0 121.8,1869.6 123.3,1546.7 120.1,1385.5 122.0,932.0 125.9,441.2 120.6,67.5 376.0,73.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0124/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[122.0,932.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0331728,46.5948567]}},{"type":"Feature","properties":{"resourceCoords":[854.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0301428,46.5951446]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0125__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p125 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"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":"6556.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0125__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0125","type":"ImageService3","width":1639,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1570.2,1693.2 1576.0,1110.2 1568.5,213.7 1556.7,194.7 845.4,622.4 73.2,1074.0 49.3,1712.2 69.0,1712.1 66.9,1901.2 995.5,1897.7 1280.6,1895.9 1569.8,1900.8 1570.2,1693.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0125__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[514.0,1104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02942477226527,46.59769905657096]}},{"type":"Feature","properties":{"resourceCoords":[514.0,1888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03043982551138,46.59650234796936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0126/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p126","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0126/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0126","type":"ImageService3","width":1639,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.8,1978.0 144.0,1978.0 184.2,1978.0 231.7,1902.5 659.7,1911.8 659.2,1886.5 1406.2,1956.2 1406.2,1978.0 1578.8,1978.0 1521.5,1834.2 1592.5,1318.5 1555.8,404.3 1482.5,386.3 1463.1,148.3 1100.8,153.8 972.2,1.0 825.0,1.0 66.0,439.5 63.9,436.2 86.7,1331.6 90.8,1914.0 91.8,1978.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0126/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02507343364204,46.59660597360368]}},{"type":"Feature","properties":{"resourceCoords":[1215.0,332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02325666284277,46.5972226659089]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0127/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p127","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0127/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0127","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"956.6,1913.6 384.1,1919.0 244.3,1923.1 67.5,1920.5 2.5,1916.6 22.4,1850.7 40.5,1775.4 46.9,1729.6 51.1,1658.2 50.7,808.1 43.4,402.0 81.2,52.5 980.9,40.9 1293.2,110.7 1453.6,35.1 1550.4,38.1 1549.6,516.0 1624.0,542.9 1613.0,555.0 1615.5,759.2 1549.2,734.1 1548.7,1013.2 1619.5,1039.7 1619.8,1066.3 1620.6,1121.4 1561.5,1283.8 1532.4,1386.9 1535.0,1911.5 956.6,1913.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0127/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1534.0,1396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03990674272231,46.59548903597925]}},{"type":"Feature","properties":{"resourceCoords":[54.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04121974888402,46.598104150090464]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0128/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p128","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0128/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0128","type":"ImageService3","width":1647,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"602.2,82.8 607.3,18.0 743.0,18.0 1466.2,182.8 1455.5,209.5 1256.2,710.5 1184.8,896.2 1521.3,1579.0 1416.8,1596.5 1141.0,1678.2 806.2,1800.8 525.9,1894.6 423.5,1913.3 96.5,1911.2 102.2,1393.0 132.5,1291.6 193.4,1132.2 193.6,1051.5 124.1,1024.2 128.9,748.5 194.0,774.4 194.7,572.7 205.8,561.0 132.7,533.2 140.9,61.2 602.2,82.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0128/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1216.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03835064004453,46.593516927744325]}},{"type":"Feature","properties":{"resourceCoords":[81.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04120592938247,46.59551193337142]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0129/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p129","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0129/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0129","type":"ImageService3","width":1647,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.2,1177.3 56.2,577.9 388.1,579.8 492.0,560.6 776.4,465.2 1116.1,340.4 1396.0,257.3 1520.5,236.2 1532.5,235.9 1538.6,597.0 1546.5,596.9 1537.0,1187.0 1523.6,1783.5 942.2,1782.9 38.4,1776.2 45.2,1177.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0129/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[620.0,1187.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0427713,46.5944685]}},{"type":"Feature","properties":{"resourceCoords":[1537.0,1187.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0427269,46.5928502]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0130/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p130","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0130/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0130","type":"ImageService3","width":1647,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1475.5,1409.2 1481.0,1762.7 1257.9,1763.0 708.0,1778.6 411.6,1785.3 108.9,1787.0 111.8,1190.3 111.0,600.0 103.1,600.2 90.7,239.3 430.4,224.8 576.7,218.6 1456.6,207.8 1475.5,1409.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0130/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1472.0,1188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0427165,46.5904496]}},{"type":"Feature","properties":{"resourceCoords":[111.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.041211,46.592853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0131/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p131","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0131/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0131","type":"ImageService3","width":1647,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1550.1,723.2 1531.0,1270.2 1526.8,1824.5 944.9,1815.9 619.5,1815.7 607.1,1784.8 56.4,1786.0 67.3,1288.9 79.0,440.0 84.0,145.0 981.9,158.7 1559.4,163.9 1550.1,723.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0131/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[958.0,1263.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.047142,46.59387]}},{"type":"Feature","properties":{"resourceCoords":[74.0,736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0458409,46.5954651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0132/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p132","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0132/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0132","type":"ImageService3","width":1627,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1082.5,1844.8 607.9,1816.6 93.4,1819.5 89.5,1262.1 100.9,712.0 102.3,149.5 404.6,151.2 700.7,147.7 1250.0,138.2 1472.8,140.4 1477.9,1252.5 1537.4,1244.8 1580.3,1272.5 1557.2,1273.0 1590.3,1678.0 1518.9,1898.5 1097.7,1874.7 1082.5,1844.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0132/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[100.0,704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04568551976142,46.59284579350926]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,1265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04708411392251,46.59040560468566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0133/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p133","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0133/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0133","type":"ImageService3","width":1627,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.7,451.1 125.5,44.8 315.3,137.4 346.1,75.6 601.0,148.0 601.0,158.7 1155.4,196.7 1155.6,143.4 1475.2,300.3 1513.6,319.1 1442.8,769.6 1450.8,769.6 1484.8,1339.8 1474.9,1339.8 1503.0,1916.8 1458.1,1916.6 605.5,1915.6 106.1,1910.8 103.7,1335.5 103.8,760.5 49.1,745.6 119.7,451.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0133/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[602.0,1338.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0473004,46.5964721]}},{"type":"Feature","properties":{"resourceCoords":[602.0,764.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0473214,46.5974873]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0134/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p134","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0134/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0134","type":"ImageService3","width":1627,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.7,307.6 35.5,752.5 43.5,752.5 76.8,1315.6 67.0,1315.6 94.5,1885.5 343.0,1886.7 933.1,1891.0 1524.0,1899.3 1528.0,1328.0 1528.8,762.3 1526.1,624.1 1530.5,449.5 1017.4,206.5 668.1,37.0 588.2,1.0 549.4,1.0 458.9,192.1 347.8,426.5 127.4,318.2 105.7,307.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0134/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[340.0,754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0443635,46.5975037]}},{"type":"Feature","properties":{"resourceCoords":[1528.0,1328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0412455,46.5965069]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0135/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p135","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0135/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0135","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"86.0,123.8 85.0,34.4 799.4,33.5 1515.6,37.0 1516.8,1048.1 1515.2,1118.3 1520.2,1614.0 1559.8,1613.4 1583.1,1661.5 1065.9,1871.3 1061.2,1861.7 799.3,1908.6 798.7,1978.0 619.9,1978.0 586.5,1978.0 548.4,1896.8 66.1,1861.2 57.0,123.8 86.0,123.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0135/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[799.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0465268,46.6008588]}},{"type":"Feature","properties":{"resourceCoords":[1516.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0448639,46.6003213]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p136 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.92"},{"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":"6512.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"783.5,1370.5 783.7,1155.5 816.8,1139.8 908.0,1138.2 1300.8,1142.2 1304.2,1075.2 1242.7,1074.9 1386.8,583.5 1617.4,583.8 1590.2,525.0 1530.5,395.7 1374.0,64.0 794.4,60.4 87.8,54.1 76.2,1060.0 73.8,1129.9 72.4,1623.2 111.9,1623.0 467.7,1628.3 534.9,1629.3 783.4,1633.0 783.5,1370.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[75.0,1095.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0454424,46.5994764]}},{"type":"Feature","properties":{"resourceCoords":[1374.0,64.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.041297,46.600185]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p136 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3465.6"},{"label":"split_canvas_y","value":"4871.6"},{"label":"split_canvas_w","value":"3046.4"},{"label":"split_canvas_h","value":"3044.4"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"974.7,1863.2 1535.5,1860.2 1512.1,1801.2 1578.6,1791.7 1616.2,1783.9 1301.0,1219.3 1234.9,1219.7 1253.6,1259.5 1280.5,1316.7 1055.3,1317.7 917.5,1798.0 977.6,1797.9 974.7,1863.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0136__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1283.2,1331.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04129110056947,46.59914239026372]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,1856.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04128084245427,46.59809106948233]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p137 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4424.0"},{"label":"split_canvas_w","value":"3030.0"},{"label":"split_canvas_h","value":"3492.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"752.5,1978.0 753.0,1978.0 756.5,1937.7 723.2,1866.8 705.5,1795.2 695.0,1631.5 700.5,1127.0 21.5,1138.7 40.4,1940.0 729.5,1914.3 752.5,1978.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[78.0,1136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.05593749938963,46.60487055439577]}},{"type":"Feature","properties":{"resourceCoords":[708.5,1136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.05445398919419,46.60440043553686]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p137 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"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":"6512.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"68.4,895.6 135.1,1079.7 766.2,1102.4 838.3,1276.0 839.8,1887.8 1177.7,1938.5 1539.2,1879.0 1553.0,101.2 1615.5,96.7 1615.2,56.9 1425.7,55.3 1425.8,36.1 307.4,56.4 79.2,153.6 15.7,51.6 10.7,551.4 21.2,713.6 38.9,784.6 72.0,854.7 68.4,895.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0137__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1504.0,1095.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.05207728028347,46.60159902429754]}},{"type":"Feature","properties":{"resourceCoords":[74.0,62.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.05433616174324,46.604360061466274]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0138/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p138","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0138/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0138","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1871.3 1.0,1890.5 190.3,1890.9 203.4,1929.9 851.4,1879.0 1460.3,1951.0 1460.4,1978.0 1469.0,1978.0 1489.0,1978.0 1488.0,1890.0 1487.1,1127.4 1482.0,868.6 1484.3,352.4 1482.7,44.1 1478.9,41.8 78.1,75.6 55.5,1869.9 1.0,1871.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0138/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1488.0,1381.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0470529,46.6030443]}},{"type":"Feature","properties":{"resourceCoords":[1488.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0476169,46.6022205]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0139/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p139","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0139/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0139","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"785.1,1891.7 77.5,1889.1 80.3,1121.9 76.5,861.5 81.4,342.2 81.2,32.0 264.2,143.8 399.1,56.0 725.0,55.3 881.5,158.2 1084.5,181.1 1511.5,164.6 1522.7,860.5 1502.0,860.0 1506.5,1386.3 1494.5,1898.7 785.1,1891.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0139/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[80.0,1377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0470529,46.6030443]}},{"type":"Feature","properties":{"resourceCoords":[1502.0,860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.043152,46.602813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0140__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p140 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"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":"6528.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0140__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0140","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1493.0,1645.2 1399.1,1649.5 1330.3,1545.5 1302.6,1545.5 1236.1,1403.3 1235.7,1402.4 912.4,913.5 568.1,102.7 449.3,65.2 125.2,148.8 100.0,149.8 112.3,851.9 91.4,851.4 96.8,1382.3 85.4,1899.3 795.0,1899.2 1377.1,1897.4 1302.7,1739.7 1493.0,1645.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0140__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[798.0,1381.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0420835,46.601441]}},{"type":"Feature","properties":{"resourceCoords":[798.0,676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0413194,46.602567]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0141__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p141 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"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":"6528.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0141__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0141","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"32.4,1063.5 31.8,1162.4 94.1,1191.7 137.7,1863.7 175.2,1872.9 182.7,1874.0 221.7,1879.8 294.2,1884.5 1157.7,1890.3 1553.8,1884.0 1549.0,218.7 1202.0,90.9 844.9,164.4 762.7,589.5 422.0,585.6 247.5,511.5 199.2,512.1 30.2,514.5 31.4,690.8 32.4,1063.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0141__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[550.0,1875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03994898894426,46.598132621943215]}},{"type":"Feature","properties":{"resourceCoords":[46.0,1875.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04122653256084,46.59812286499419]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p142 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.87"},{"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":"5555.2"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.2,149.7 65.9,172.1 71.2,1688.1 231.0,1893.4 181.6,1978.0 215.2,1978.0 456.8,1567.4 688.9,1107.0 956.0,585.0 1101.2,291.0 1070.8,269.3 395.1,11.8 394.9,14.0 371.9,14.0 371.1,2.6 366.9,1.0 350.1,1.0 347.9,3.5 347.9,8.0 343.6,8.5 337.9,15.0 207.1,19.0 138.2,149.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[688.9,1107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.048554,46.592833]}},{"type":"Feature","properties":{"resourceCoords":[1060.8,371.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04859,46.594287]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p142 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1646.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4881.6"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"585.6,1973.5 703.1,1912.6 708.4,1893.3 720.5,1887.4 1482.0,1823.6 1519.2,1830.0 1550.8,1817.7 1555.5,1256.7 1566.6,673.5 1580.1,90.4 1525.0,74.1 1522.5,83.7 1267.5,283.2 986.6,969.3 597.1,1666.8 585.6,1973.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0142__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1028.3,1002.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04991811219297,46.59585631423802]}},{"type":"Feature","properties":{"resourceCoords":[1545.0,1847.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.04852679731906,46.59441711717615]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0143__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p143 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3695.2"},{"label":"split_canvas_w","value":"6528.0"},{"label":"split_canvas_h","value":"4220.8"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0143__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0143","type":"ImageService3","width":1632,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1631.0,994.2 1463.7,994.2 1297.5,948.7 1203.6,982.0 738.0,946.9 605.4,979.5 466.0,950.0 403.1,995.5 228.2,996.3 197.7,964.8 96.2,994.0 28.6,1307.3 53.8,1878.2 184.2,1977.5 1274.3,1975.4 1275.0,1969.0 1431.0,1964.2 1486.3,1937.7 1627.2,1936.9 1628.1,1687.0 1631.0,1643.2 1631.0,1570.2 1631.0,994.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0143__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[456.0,1500.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02652643466635,46.607662246802995]}},{"type":"Feature","properties":{"resourceCoords":[456.0,1221.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02511628969755,46.60767887420187]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0144/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p144","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.73"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0144/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0144","type":"ImageService3","width":1627,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1534.6,1956.1 1540.5,1508.1 1540.9,1092.5 1552.1,1092.3 1554.1,1092.3 1570.8,623.3 1577.8,639.2 1608.2,590.7 1585.4,593.9 1570.3,58.3 1578.2,58.0 1568.9,39.5 1396.7,39.1 856.5,38.8 711.4,40.0 491.1,43.5 212.1,43.4 1.0,46.2 1.0,53.0 59.7,55.2 58.3,667.0 1.2,667.1 2.8,1306.7 1.0,1334.1 1.0,1596.0 29.4,1595.8 78.1,1921.6 330.9,1898.5 926.8,1945.6 1508.2,1938.8 1534.6,1956.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0144/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1031.0,319.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0219992,46.5999983]}},{"type":"Feature","properties":{"resourceCoords":[1297.0,1090.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.025937,46.59902]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0145/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p145","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0145/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0145","type":"ImageService3","width":1627,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"45.2,872.1 46.4,774.2 78.8,725.3 50.8,683.3 80.7,601.7 59.5,154.4 86.8,158.7 93.7,100.5 633.5,87.1 987.6,20.2 1473.8,19.1 1579.5,46.2 1601.9,1855.8 1580.4,1946.2 60.6,1927.3 22.6,1763.0 25.7,1304.4 78.1,1098.1 45.2,872.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0145/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[606.0,430.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.07163459773417,46.60308721016754]}},{"type":"Feature","properties":{"resourceCoords":[282.0,1563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.06707577064782,46.60037957301481]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0201__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p201 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.68"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"947.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5576.4"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0201__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0201","type":"ImageService3","width":1631,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"988.2,887.3 392.0,1908.8 732.5,1917.5 1589.0,1914.8 1588.2,1738.2 1581.4,550.5 1573.0,234.2 1496.6,234.6 1496.2,160.4 1426.4,234.8 1364.2,217.8 988.2,887.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0201__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.6,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02788914532108,46.59072600098826]}},{"type":"Feature","properties":{"resourceCoords":[1560.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02583647497511,46.5907330629545]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0202/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p202","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0202/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0202","type":"ImageService3","width":1631,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,323.0 1.0,395.9 74.0,396.0 80.1,702.4 79.0,1852.4 793.8,1852.9 1603.0,1853.5 1603.2,1839.9 1603.2,1830.6 1573.1,1830.2 1519.5,550.7 1555.7,63.9 649.6,76.2 520.9,21.4 524.5,1.0 306.9,1.0 1.0,323.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0202/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[80.0,1274.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.025783,46.592036]}},{"type":"Feature","properties":{"resourceCoords":[1506.0,697.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.022123,46.593088]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0203__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p203 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"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":"6524.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0203__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0203","type":"ImageService3","width":1631,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"194.4,1778.2 310.7,1821.2 384.7,1837.0 789.9,1840.0 1514.2,1832.9 1515.3,982.9 1518.0,135.7 1188.0,128.8 1176.0,150.2 905.1,606.0 797.3,782.6 490.0,1273.0 322.8,1548.3 196.9,1774.1 194.4,1778.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0203__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,758.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0297756109471,46.58959255488897]}},{"type":"Feature","properties":{"resourceCoords":[1155.0,138.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02883999858186,46.5906916010405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p204","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0204","type":"ImageService3","width":1640,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"857.0,218.7 856.9,47.1 1574.2,45.2 1572.9,347.1 1576.1,560.6 1574.0,783.7 1582.8,1031.1 1589.0,1354.5 1592.9,1919.2 879.9,1921.8 6.9,1922.0 14.8,1068.9 24.1,218.6 857.0,218.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0204/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[861.0,787.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0257416610467,46.58970453388562]}},{"type":"Feature","properties":{"resourceCoords":[861.0,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02571776270644,46.587723361735534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p205","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0205/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0205","type":"ImageService3","width":1640,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"934.3,55.3 934.5,32.5 1487.5,42.1 1485.2,358.4 1486.0,732.0 1479.8,1349.4 1480.5,1920.1 850.4,1908.1 140.2,1904.6 139.4,1346.7 135.0,1027.1 127.7,782.7 130.9,562.3 128.9,351.3 131.8,53.0 934.3,55.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0205/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[837.0,782.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.022065,46.5897393]}},{"type":"Feature","properties":{"resourceCoords":[837.0,55.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0220909,46.5910386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p206","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0206/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0206","type":"ImageService3","width":1636,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1555.7,55.1 1522.5,580.1 1581.5,768.9 1606.7,1588.9 1584.7,1904.3 1528.0,1918.1 802.5,1921.3 68.8,1929.0 64.0,1355.0 65.6,734.0 62.1,358.2 62.0,40.1 1555.7,55.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0206/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[64.0,1355.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.020373,46.588741]}},{"type":"Feature","properties":{"resourceCoords":[1524.0,791.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.016607,46.5897598]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0207/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p207","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0207/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0207","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1586.1,1889.2 1610.7,1889.4 1608.3,87.7 1603.2,87.7 880.6,88.3 476.4,81.8 402.8,65.3 287.1,21.4 276.3,39.1 80.7,355.4 1.0,472.4 1.0,636.3 24.1,633.7 37.6,632.1 62.1,1051.2 67.7,1463.4 63.2,1463.4 126.3,1887.5 148.2,1887.7 177.6,1888.6 864.8,1886.5 1586.1,1889.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0207/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[403.0,1466.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03098168037518,46.58521942680691]}},{"type":"Feature","properties":{"resourceCoords":[1579.0,630.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02796164936782,46.5867241153607]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0208/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p208","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0208/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0208","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,86.5 1.0,1883.3 392.9,1885.9 854.2,1888.4 1256.3,1888.3 1437.7,1887.7 1493.4,1468.1 1502.3,1468.1 1476.9,1046.0 1387.3,1044.9 1384.8,633.9 1447.3,634.0 1579.3,87.4 1567.0,87.4 860.2,88.3 1.0,86.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0208/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[837.0,1048.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02570289618338,46.585991004677275]}},{"type":"Feature","properties":{"resourceCoords":[837.0,1466.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02569140738764,46.58524639221988]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p209","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0209/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0209","type":"ImageService3","width":1628,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"139.7,1458.5 148.7,1458.4 117.6,1036.7 28.0,1036.8 20.0,625.8 82.5,625.1 207.2,76.8 907.6,68.8 1539.9,70.4 1552.4,1039.3 1558.7,1861.7 982.8,1870.0 323.7,1874.9 89.6,1878.8 139.7,1458.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0209/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[975.0,1868.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02182793401488,46.58452155737126]}},{"type":"Feature","properties":{"resourceCoords":[1543.0,1453.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02035277756748,46.585258067433]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0210/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p210","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0210/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0210","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"116.6,1849.8 43.2,1845.5 52.0,1023.8 57.2,55.5 788.7,54.5 1512.0,58.0 1568.7,44.8 1536.8,448.7 1574.2,1932.7 394.2,1884.0 115.7,1924.8 116.6,1849.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0210/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[46.0,1624.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0203167,46.584925]}},{"type":"Feature","properties":{"resourceCoords":[1512.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.016578,46.587757]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0211__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p211 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"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":"6540.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0211__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0211","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"36.6,1407.8 1.0,1496.5 1.0,1818.1 515.4,1817.1 676.4,1816.5 845.6,1815.8 1610.1,1810.2 1616.5,1389.6 1614.7,984.8 1618.5,556.1 1616.1,154.9 1586.7,154.2 1269.1,152.7 810.7,150.5 747.6,141.7 642.9,93.2 404.0,507.4 404.0,534.0 388.6,534.0 367.4,570.7 119.1,986.0 26.7,1144.3 1.0,1188.4 1.0,1408.4 36.6,1407.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0211__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[860.0,978.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03349525235049,46.583000782135706]}},{"type":"Feature","properties":{"resourceCoords":[860.0,558.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03349968250811,46.58374511141654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0212/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p212","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0212/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0212","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"30.9,1396.0 30.4,987.9 35.8,555.7 34.7,151.2 729.3,147.8 1458.5,149.3 1457.8,570.3 1457.3,609.2 1456.5,686.9 1468.2,697.3 1503.6,984.0 1541.0,985.1 1542.5,1762.8 1600.0,1764.4 1603.0,1788.7 778.3,1809.7 778.2,1816.9 23.1,1820.0 30.9,1396.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0212/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[783.0,982.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02962475616727,46.5830144513564]}},{"type":"Feature","properties":{"resourceCoords":[783.0,1818.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02960883124902,46.58154499672688]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p213 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.09"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3926.8"},{"label":"split_canvas_w","value":"6540.0"},{"label":"split_canvas_h","value":"3989.2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.9,1620.0 1.0,1811.9 98.5,1809.7 107.7,1896.2 246.5,1958.0 644.6,1977.8 693.5,1904.4 1156.1,1901.0 1215.6,1971.9 1533.7,1971.9 1534.2,1978.0 1538.5,1978.0 1540.5,1978.0 1599.8,1336.3 1526.2,1327.1 1513.7,1261.5 1501.8,981.7 1332.0,981.7 1188.1,986.1 699.0,1000.3 698.5,981.7 562.1,981.7 550.8,1003.0 365.0,1006.7 162.6,1390.0 89.5,1515.8 29.9,1620.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[-87.0,1799.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0378879,46.5800473]}},{"type":"Feature","properties":{"resourceCoords":[365.0,1006.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0366113,46.581508]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p213 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"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":"6540.0"},{"label":"split_canvas_h","value":"3926.8"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.8,980.7 117.0,980.7 116.5,938.1 1524.2,980.7 1525.2,134.1 1318.3,137.8 912.6,143.5 447.2,147.4 26.0,150.5 29.8,569.4 29.7,685.5 41.5,695.7 79.8,980.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0213__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1328.0,139.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0245679721492,46.58449802326655]}},{"type":"Feature","properties":{"resourceCoords":[60.0,139.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02782564337828,46.58450539698791]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p214","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0214/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0214","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.7,142.8 966.1,142.9 1545.8,139.0 1619.8,142.5 1619.8,150.5 1619.7,218.1 1571.8,225.7 1540.4,1948.2 854.6,1891.5 137.8,1926.0 54.3,1841.8 35.8,994.9 82.9,995.4 90.9,144.8 302.7,142.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0214/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[912.0,1418.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.021931,46.582261]}},{"type":"Feature","properties":{"resourceCoords":[302.0,998.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.023507,46.582999]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0215/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p215","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0215/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0215","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.4,510.4 28.2,440.5 24.4,138.2 793.0,135.0 1546.0,131.7 1550.9,551.0 1547.0,977.0 1549.0,1405.0 1568.2,1405.0 1586.1,1884.7 1498.5,1939.1 1177.6,1860.2 151.9,1852.7 53.1,1752.5 28.8,1239.6 116.9,522.5 39.4,510.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0215/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[793.0,135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0315523,46.5815314]}},{"type":"Feature","properties":{"resourceCoords":[1549.0,1405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0295897,46.5793025]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0216/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p216","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0216/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0216","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.2,1399.1 21.0,1399.0 21.0,971.0 27.0,545.1 24.1,125.9 24.2,118.7 846.5,101.5 843.7,77.3 1551.5,100.0 1562.4,1737.7 1506.4,1936.0 1155.4,1847.6 114.5,1842.7 55.8,1878.8 40.2,1399.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0216/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[21.0,1399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0295897,46.5793025]}},{"type":"Feature","properties":{"resourceCoords":[21.0,971.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0296029,46.580057]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0217__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p217 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1774.4"},{"label":"split_canvas_y","value":"2003.6"},{"label":"split_canvas_w","value":"4765.6"},{"label":"split_canvas_h","value":"5912.4"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0217__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0217","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"654.3,1792.9 757.2,1841.8 819.5,1851.0 1272.2,1857.3 1564.3,1861.4 1503.4,1441.2 1507.9,1441.2 1504.9,1033.0 1504.0,1033.0 1481.3,617.9 1467.9,619.4 1400.1,626.8 1307.3,660.7 1197.2,862.8 1093.9,1037.2 654.3,1792.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0217__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1094.3,1026.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03294235023301,46.585952519366465]}},{"type":"Feature","properties":{"resourceCoords":[599.5,1864.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.03420482193323,46.58443828595151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0218__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p218 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.98"},{"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":"6540.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0218__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0218","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"86.7,1836.5 411.4,1918.5 1564.3,1925.1 1531.3,76.2 1499.1,65.8 537.4,62.3 556.9,237.2 459.8,505.6 459.3,558.2 428.8,591.3 428.4,1016.1 366.0,1082.8 366.0,1086.9 362.2,1086.9 358.7,1090.6 46.9,1130.2 86.7,1836.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0218__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[42.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.010876,46.582259]}},{"type":"Feature","properties":{"resourceCoords":[1499.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.007156,46.5841146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0219/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p219","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0219/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0219","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.0,46.6 1513.9,52.4 1511.3,329.8 1521.0,329.5 1557.3,1380.2 1510.3,1379.8 1505.4,1933.7 48.0,1920.1 53.0,1363.9 50.8,941.0 37.3,940.9 78.0,46.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0219/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[62.0,880.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.02065146824849,46.603757316882806]}},{"type":"Feature","properties":{"resourceCoords":[1512.0,1366.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01688951210274,46.60295651951769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p220","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0220/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0220","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.7,335.3 51.0,335.5 53.4,57.4 1537.3,62.3 1534.8,348.9 1537.1,907.8 1532.3,1400.7 1518.1,1952.9 799.5,1947.1 46.2,1943.4 50.8,1388.1 97.9,1388.5 60.7,335.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0220/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[801.0,1386.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01496626227528,46.60296519330256]}},{"type":"Feature","properties":{"resourceCoords":[44.0,1924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01687978066188,46.60198611528991]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0221/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p221","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0221/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0221","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"555.1,1935.6 21.1,1932.1 33.2,1380.0 36.1,887.1 31.6,328.4 33.0,41.8 1542.2,41.0 1599.3,256.0 1602.8,898.1 1591.7,1914.3 1559.3,1937.7 1215.5,1940.0 555.1,1935.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0221/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1218.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01006629485876,46.60386961803466]}},{"type":"Feature","properties":{"resourceCoords":[38.0,891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01309787430759,46.60383125565503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0222/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p222","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0222/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0222","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1158.4,1889.2 925.5,1887.6 771.5,1870.5 684.0,1910.3 50.5,1879.8 50.9,1855.3 66.4,786.3 68.1,499.1 67.2,63.0 1514.0,85.0 1519.2,759.0 1507.8,1278.6 1505.5,1537.0 1498.1,1898.3 1158.4,1889.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0222/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[60.0,1254.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0205559,46.5997948]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.016873,46.601952]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0223/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p223","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0223/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0223","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.8,1521.7 65.0,1264.5 68.3,747.2 52.7,76.5 795.3,73.5 1503.6,72.8 1532.9,72.8 1539.4,1404.1 1510.0,1398.2 1509.0,1875.1 786.8,1882.4 65.0,1881.4 66.8,1521.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0223/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[788.0,1884.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01489475031161,46.59873308129557]}},{"type":"Feature","properties":{"resourceCoords":[788.0,95.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01495617011746,46.601936328563895]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0224/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p224","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0224/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0224","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.1,1389.8 103.5,1396.1 115.2,63.4 613.0,70.8 1264.7,80.6 1580.9,81.2 1543.9,123.8 1583.3,866.4 1558.0,865.9 1525.3,1978.0 1507.2,1978.0 1509.2,1894.0 787.0,1867.7 786.9,1877.5 66.7,1867.2 74.1,1389.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0224/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.011148155062,46.59877206814387]}},{"type":"Feature","properties":{"resourceCoords":[58.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.01303750353176,46.59873722669769]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p225 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.64"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6440.8"},{"label":"split_canvas_w","value":"2798.0"},{"label":"split_canvas_h","value":"1475.2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"669.9,1972.1 679.2,1804.8 640.5,1842.4 618.3,1766.1 680.8,1652.6 52.7,1638.6 34.0,1973.3 669.9,1972.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1610.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.01908735131512,46.60633373963882]}},{"type":"Feature","properties":{"resourceCoords":[699.5,1610.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.01729496014394,46.60634626777017]}},{"type":"Feature","properties":{"resourceCoords":[699.5,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.01728541465174,46.60569256937461]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1979.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-112.01907780582292,46.60568004124327]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p225 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.97"},{"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":"6540.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.5,455.6 73.9,1554.8 687.2,1576.3 697.6,1616.7 699.5,1616.7 699.5,1623.9 749.9,1820.2 861.6,1906.1 1256.9,1854.5 1497.9,1920.5 1524.7,1887.3 1529.0,1538.0 1528.5,977.6 1534.2,651.1 1538.5,234.9 1536.0,130.5 1195.9,123.5 962.7,123.3 808.5,107.2 721.1,147.6 86.8,120.8 83.5,437.6 46.5,455.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0225__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[72.0,962.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0205226,46.5971816]}},{"type":"Feature","properties":{"resourceCoords":[1529.0,1538.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0167145,46.5962151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0226/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p226","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0226/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0226","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.9,1548.4 55.3,984.0 59.3,655.1 61.3,236.0 58.2,130.8 789.4,134.8 1521.0,130.3 1519.2,411.2 1518.7,989.0 1514.1,1277.3 1510.1,1898.0 107.7,1836.0 56.5,1900.2 58.9,1548.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0226/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[787.0,1554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0148414,46.5962273]}},{"type":"Feature","properties":{"resourceCoords":[787.0,404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0148922,46.59826]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0227/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p227","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0227/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0227","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"789.9,116.1 789.9,106.2 1518.2,125.0 1517.1,209.6 1535.4,210.4 1531.8,406.4 1514.5,406.2 1508.5,694.4 1512.0,970.0 1507.0,1545.3 1507.0,1840.5 1505.2,1978.0 1498.6,1978.0 1461.5,1978.0 1461.0,1935.5 54.6,1874.7 58.0,1256.2 62.2,969.0 62.1,393.3 63.7,113.4 789.9,116.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0227/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[56.0,1538.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0129765,46.5962385]}},{"type":"Feature","properties":{"resourceCoords":[1512.0,970.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.009241,46.5972878]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0228/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p228","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.51"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0228/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0228","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"91.5,1314.2 74.3,1314.2 70.5,1601.5 76.1,1876.1 799.5,1877.7 1522.0,1887.0 1574.9,1884.8 1588.0,1707.6 1563.7,85.7 1246.0,22.4 958.0,27.5 912.0,95.3 904.9,34.6 132.2,13.0 131.3,1.0 105.8,1.0 91.5,1314.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0228/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[798.0,1315.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0073831,46.5982974]}},{"type":"Feature","properties":{"resourceCoords":[1522.0,1887.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.005495,46.59729]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0229/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p229","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0229/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0229","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"83.1,685.2 85.2,109.0 812.0,112.5 1538.0,123.8 1591.1,121.7 1551.3,643.6 1580.2,1832.3 812.0,1832.0 85.8,1838.0 85.3,1978.0 56.6,1978.0 39.9,1118.7 83.5,1118.5 84.7,980.8 83.1,685.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0229/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.0,1832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0073183,46.5942494]}},{"type":"Feature","properties":{"resourceCoords":[1538.0,1262.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0054626,46.5952734]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0230/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Helena, Montana | 1930 | sanborn05017_005 p230","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:19:20Z","modified":"2026-10-18T13:19:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0230/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0230","type":"ImageService3","width":1635,"height":1979},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.8,1514.4 1567.0,1886.5 1505.2,1946.4 1134.1,1857.1 548.2,1901.4 62.4,1856.0 38.1,256.0 66.8,255.1 67.9,115.4 792.9,112.4 1559.7,116.0 1587.8,1514.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd425m:g4254m:g4254hm:g4254hm_g050171930:05017_1930-0230/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[63.0,1264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.009158,46.592186]}},{"type":"Feature","properties":{"resourceCoords":[1514.0,689.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-112.0054332,46.5932456]}}]}}]}