{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn00014_010.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Bessemer, Alabama | 1950 | 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":"45"},{"label":"placed","value":"32"},{"label":"unplaced","value":"13"},{"label":"fit sources","value":"georef 14, georef-snap 13, snap:0 4, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 12 panels"},{"label":"unplaced pages","value":"p15 (tier 1, 33.40893,-86.95647 +/-517m); p2 (tier 1, 33.40346,-86.95197 +/-259m); p28__2 (tier 2, 33.41152,-86.92851 +/-107m); p30__2 (tier 1, 33.40385,-86.97230 +/-350m); p31 (tier 2, 33.41243,-86.97158 +/-329m); p32__2 (tier 1, 33.41602,-86.97741 +/-228m); p33 (tier 1, 33.41363,-86.95883 +/-511m); p37__1 (tier 2, 33.43553,-86.94477 +/-100m); p37__2 (tier 2, 33.43553,-86.94477 +/-100m); p4 (tier 1, 33.40420,-86.96173 +/-512m); p6 (tier 2, 33.40770,-86.96776 +/-604m); p7 (tier 2, 33.40350,-86.96258 +/-471m); p8 (tier 1, 33.40413,-86.96173 +/-517m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p10","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.17"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.4,655.7 59.3,178.7 115.6,88.7 1371.6,40.1 1485.5,130.8 1514.5,1774.1 800.6,1760.3 392.5,1856.9 93.5,1792.8 47.5,993.1 93.4,655.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[662.0,636.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.967698,33.385084]}},{"type":"Feature","properties":{"resourceCoords":[662.0,87.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9687433,33.3856898]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p11","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"292.0,41.1 144.6,41.5 144.7,646.5 142.1,702.7 140.9,1852.0 848.7,1843.0 1189.0,1849.0 1536.6,1841.6 1529.6,1567.1 1533.3,1567.1 1535.2,1294.1 1538.2,1022.3 1535.5,1022.3 1522.5,748.5 1539.6,748.6 1544.1,9.8 1603.0,1.4 1603.0,1.0 337.9,1.0 292.0,41.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1189.0,1849.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.949414,33.397821]}},{"type":"Feature","properties":{"resourceCoords":[142.0,744.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9528372,33.3973548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p12","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.2,742.0 58.9,741.8 71.4,1016.8 74.1,1016.8 70.4,1289.8 69.7,1289.8 68.0,1564.0 64.3,1564.0 70.7,1839.6 79.5,1839.5 780.5,1840.0 1217.6,1842.0 1499.5,1841.3 1505.8,1291.7 1507.5,1015.7 1504.0,747.0 1510.5,478.6 1511.6,47.5 1456.1,46.9 1405.5,1.0 82.3,1.0 76.2,742.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[784.0,1289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9491113,33.4000793]}},{"type":"Feature","properties":{"resourceCoords":[1504.0,747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.949215,33.401784]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p13","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"833.7,42.0 833.5,73.7 1514.0,125.1 1513.9,120.0 1555.8,167.7 1555.3,548.6 1512.2,548.9 1513.7,1260.5 1514.0,1528.6 1514.5,1810.3 829.9,1809.2 125.8,1810.4 131.1,1266.9 132.3,994.0 128.4,728.3 134.4,462.9 134.6,36.5 833.7,42.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0013/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9507629,33.402364]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9486846,33.4049202]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.94505310000001,33.402862400000004]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9471314,33.4003062]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"135.6,265.4 1.0,265.9 1.0,1739.9 46.4,1739.5 99.2,1786.4 155.3,1786.5 870.8,1786.6 870.9,1819.0 1567.7,1866.3 1567.6,1861.1 1533.5,1822.9 1604.2,732.1 1558.7,133.0 1403.3,47.5 229.9,60.2 167.5,1.0 131.8,1.0 135.6,265.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[913.0,1158.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95071526404045,33.40437300478371]}},{"type":"Feature","properties":{"resourceCoords":[1524.0,98.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95189341168683,33.406440667332845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.0,47.1 79.9,389.0 90.0,743.8 1.0,744.7 1.0,773.3 49.0,774.9 53.6,1696.5 91.6,1696.7 91.2,1912.0 154.3,1912.0 1402.7,1843.5 1456.1,1912.0 1499.1,1912.0 1499.4,1804.9 1503.5,411.4 1484.2,413.6 1432.7,414.2 1322.0,51.3 1248.8,52.3 1245.0,16.9 173.2,48.0 81.0,47.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,401.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95835129504626,33.40861294191805]}},{"type":"Feature","properties":{"resourceCoords":[813.0,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95899528136054,33.4089769152323]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p17","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"106.0,74.7 176.9,2.6 206.0,42.7 1351.8,19.9 1533.7,54.5 1554.1,84.5 1534.4,133.2 1570.1,179.2 1561.1,215.6 1580.6,220.5 1533.1,318.8 1567.8,466.8 1541.3,867.5 1557.1,899.0 1523.4,899.0 1523.0,988.8 1522.8,1795.6 1545.0,1795.5 1556.7,1805.5 1522.7,1804.5 1522.5,1836.5 1168.0,1829.2 1168.0,1834.7 813.0,1819.6 813.0,1824.9 457.9,1836.8 457.9,1835.5 114.8,1872.0 97.2,1798.4 100.9,1798.4 101.7,1662.2 102.3,1519.3 99.9,981.3 102.3,803.8 92.9,803.8 102.9,104.6 19.3,104.5 20.9,74.8 106.0,74.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[813.0,1797.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9590126,33.3976843]}},{"type":"Feature","properties":{"resourceCoords":[1523.0,1161.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9595747,33.4011885]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"840.1,109.7 840.9,118.5 1549.2,152.9 1549.5,242.7 1549.8,379.2 1546.0,379.3 1564.2,452.9 1572.5,451.9 1572.6,664.6 1578.6,664.6 1572.5,805.6 1568.1,949.1 1569.9,949.1 1565.1,1088.8 1550.5,1458.0 1588.8,1457.7 1586.9,1632.2 1605.8,1636.7 1376.6,1698.7 1292.5,1698.8 748.2,1814.8 502.4,1867.8 501.4,1617.6 15.1,1503.7 53.3,1477.2 17.4,1156.0 12.7,591.4 18.7,356.5 88.9,143.8 88.1,120.6 840.1,109.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[874.0,1556.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95820376893172,33.39096673622517]}},{"type":"Feature","properties":{"resourceCoords":[874.0,116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.96344847624226,33.39399649863098]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p19","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"50"},{"label":"confidence","value":"0.63"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.1,475.9 47.3,624.9 45.2,769.9 37.4,1153.2 77.2,1152.1 78.7,1333.2 370.5,1396.1 409.2,1395.3 507.7,1393.3 556.8,1392.3 809.0,1722.1 811.1,1792.0 812.7,1845.5 1106.9,1843.9 1176.9,1841.1 1542.9,1831.3 1526.4,1218.0 1527.0,1187.9 1517.9,865.1 1596.6,862.7 1612.0,848.4 1612.0,329.0 1600.0,327.0 1600.0,290.0 1612.0,289.0 1612.0,50.4 1593.2,50.9 1531.1,1.0 1494.5,1.0 1495.2,33.3 1126.2,35.8 1126.3,41.4 756.5,35.8 756.7,41.4 387.4,63.8 387.4,62.4 40.1,109.0 44.4,329.7 50.6,329.5 47.1,475.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1170.0,1548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.952662,33.395681]}},{"type":"Feature","properties":{"resourceCoords":[1527.0,1240.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9528372,33.3973548]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1408.8,102.5 1527.8,372.9 1516.8,378.1 1485.4,578.9 1505.3,570.0 1460.9,782.5 1438.8,794.0 1479.0,885.0 1427.4,1166.5 1346.5,1204.8 1406.2,1336.6 1283.2,1604.5 1286.3,1640.8 1279.7,1761.0 1226.0,1755.2 1181.6,1743.7 1066.8,1851.8 1092.8,1912.0 1022.7,1912.0 1011.8,1876.5 85.2,1857.5 58.8,1808.2 75.0,1653.9 15.7,1305.2 40.6,600.1 15.2,154.5 37.0,67.2 253.9,14.3 945.6,37.1 1351.2,13.5 1420.7,39.3 1408.8,102.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,1095.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95911833536013,33.380915517256575]}},{"type":"Feature","properties":{"resourceCoords":[215.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9636100744662,33.380422332916545]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.78"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.0,1057.3 154.6,1072.5 210.2,1153.5 211.2,1436.1 139.7,1488.0 231.1,1618.7 245.5,1670.9 420.9,1764.9 421.3,1756.8 668.5,1721.0 668.1,1709.8 878.9,1707.8 935.8,1669.8 972.9,1792.6 1109.5,1790.0 1114.5,1792.0 1206.3,1788.5 1207.9,1793.0 1555.5,1737.8 1554.8,1630.0 1546.0,408.5 1544.2,156.5 1054.1,43.3 1005.1,77.4 879.0,44.3 587.3,81.8 212.2,83.3 147.8,119.2 104.5,95.7 35.6,318.3 1.0,342.4 1.0,408.1 164.6,647.5 154.8,654.5 160.9,855.2 178.5,842.9 174.0,1057.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[686.0,1519.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95615912340843,33.384258887483256]}},{"type":"Feature","properties":{"resourceCoords":[-15.0,1188.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95911524962894,33.382841489629676]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p22 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.07"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5833.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"1818.4"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.8,1911.7 238.7,1910.5 1546.1,1910.7 1520.7,1801.4 1484.3,1823.0 1276.2,1625.6 1310.2,1555.4 1281.5,1499.6 784.5,1483.7 677.8,1516.4 373.9,1473.6 254.7,1486.7 252.4,1466.5 236.8,1466.0 115.3,1701.8 112.3,1702.1 124.2,1810.0 133.9,1912.0 235.2,1912.0 238.8,1911.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1458.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95100283410787,33.384310365374525]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1458.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.94649824794631,33.38863854957603]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.94504632619716,33.38757005706772]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.94955091235872,33.383241872866215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p22 [2]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"},{"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":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"6041.2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"168.5,395.9 181.1,427.7 207.5,537.5 157.6,546.7 114.7,548.3 40.6,676.5 80.2,723.5 17.8,743.2 29.1,760.2 18.1,1125.5 47.4,1271.1 35.7,1401.4 1.0,1408.7 1.0,1424.2 2.0,1458.4 1611.1,1508.3 1592.9,1243.4 1589.5,1243.7 1496.4,1243.6 1488.2,1149.9 1478.0,1050.6 1480.8,1050.3 1594.2,833.6 1608.6,834.1 1587.1,623.4 1547.0,561.2 1591.8,453.1 1588.8,284.6 1552.5,168.2 1598.0,91.3 1479.0,106.2 1479.8,113.0 1157.2,200.1 1155.2,196.1 1068.8,208.6 1063.9,207.2 935.1,223.4 887.8,111.2 837.9,152.9 639.0,175.9 640.5,186.4 410.7,245.2 411.2,252.9 236.1,181.7 217.2,133.9 206.9,122.0 168.5,395.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[100.0,747.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.955154,33.380783]}},{"type":"Feature","properties":{"resourceCoords":[1178.0,482.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9528095,33.3846029]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.5,1094.3 111.4,484.2 113.4,258.9 116.3,82.0 399.1,88.5 466.4,87.7 818.3,88.3 1181.5,83.8 1356.1,87.0 1539.0,83.2 1535.7,260.8 1535.9,564.3 1532.1,794.1 1529.9,1145.9 1527.8,1679.2 1527.9,1884.3 1509.3,1879.8 1463.9,1884.2 1468.5,1912.0 1442.3,1912.0 1436.6,1876.3 101.3,1872.0 66.7,1834.0 31.5,1114.7 17.8,1094.5 42.5,1094.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1171.0,1500.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94468379567014,33.39431166836289]}},{"type":"Feature","properties":{"resourceCoords":[121.0,794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94989587760296,33.39256021960784]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p24","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"30"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"438.6,72.6 659.7,71.0 802.4,69.1 1162.7,65.0 1513.0,62.2 1526.6,1289.0 1557.3,1288.7 1545.5,1299.8 1569.0,1827.3 1519.7,1870.2 853.4,1845.1 811.9,1873.9 166.0,1878.5 90.2,1860.5 88.1,1657.3 85.0,1129.0 83.8,780.6 85.3,553.0 82.2,252.3 83.8,76.4 438.6,72.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[815.0,1825.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.940662,33.396912]}},{"type":"Feature","properties":{"resourceCoords":[1165.0,416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94496,33.400992]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"104.1,655.3 96.9,1900.7 128.1,1900.9 170.6,1862.2 1424.0,1873.9 1446.8,1903.8 1527.8,1738.9 1510.6,1736.0 1523.6,1537.9 1533.3,1538.2 1524.6,1369.8 1517.5,1369.8 1525.9,1159.0 1507.2,1129.6 1444.8,1006.9 1517.7,1007.2 1537.3,708.2 1556.0,662.8 1565.1,627.9 1599.5,575.9 1577.8,543.3 1564.0,94.8 1518.3,46.1 1239.3,69.8 889.1,26.5 702.4,63.3 158.4,52.8 130.0,10.2 130.1,1.0 107.7,1.0 105.8,369.7 105.0,509.0 104.1,655.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[816.0,1012.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94231865580703,33.404268078818106]}},{"type":"Feature","properties":{"resourceCoords":[816.0,662.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94360373956246,33.40498503681482]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.2,1882.8 71.3,1880.4 36.1,1823.0 37.8,1369.7 24.6,1352.9 104.2,1185.6 86.8,1182.9 97.2,983.0 107.0,983.1 96.0,813.5 88.8,813.6 94.4,601.0 75.1,571.6 10.6,448.7 84.1,448.1 99.9,146.4 118.0,100.4 126.8,65.0 160.8,12.2 178.1,37.3 368.3,27.4 475.3,65.8 1009.8,16.0 1317.8,14.6 1500.5,59.0 1528.8,35.1 1585.5,58.8 1573.9,321.9 1593.2,353.3 1545.2,443.5 1548.6,665.6 1548.7,799.0 1542.6,982.0 1544.4,1022.4 1542.9,1159.2 1543.2,1381.5 1544.9,1517.7 1548.3,1656.4 1550.6,1875.5 1402.5,1876.2 1402.5,1880.8 103.2,1882.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1187.0,1855.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9327992673389,33.40683587211808]}},{"type":"Feature","properties":{"resourceCoords":[463.0,449.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.93967050377877,33.40756828227991]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0027","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.8,3.3 143.6,93.9 147.1,317.9 147.1,452.5 140.9,637.0 142.8,677.7 141.3,815.6 141.5,1039.8 143.3,1177.2 146.8,1317.1 149.0,1538.0 1.0,1537.9 1.0,1542.4 7.8,1542.5 41.9,1618.5 53.6,1858.9 108.5,1880.1 1047.1,1875.7 1225.4,1821.6 1558.9,1824.1 1545.5,1679.7 1582.4,1523.6 1559.0,1115.2 1607.7,923.9 1555.3,788.0 1571.8,293.6 1550.2,78.1 1503.5,55.8 1243.4,75.4 1063.6,22.2 810.9,59.3 209.4,32.1 191.8,3.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.93769120586545,33.4106008962626]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.93374852682186,33.415453314922495]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.92690256908473,33.41152255354497]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.93084524812832,33.406670134885076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0028__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p28 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.33"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0028__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0028","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"44.4,1820.2 164.3,1867.2 870.5,1880.0 1291.1,1795.7 1319.3,1723.7 932.6,782.2 134.2,162.7 59.3,180.2 13.4,639.1 122.2,1094.8 47.1,1199.5 93.7,1341.3 33.7,1505.2 44.4,1820.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0028__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[181.0,1443.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.938104,33.41463]}},{"type":"Feature","properties":{"resourceCoords":[181.0,1731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.93757,33.414319]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p29","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0029","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"471.3,65.7 471.4,86.0 1365.2,88.2 1370.2,65.2 1601.8,199.3 1587.5,204.7 1564.5,229.1 1547.3,1207.7 1576.0,1386.0 1563.0,1645.4 1506.5,1762.8 1516.9,1804.1 1463.9,1739.0 1300.5,1744.4 1231.6,1707.6 1127.8,1716.5 1008.4,1793.2 1003.6,1831.5 814.4,1876.5 414.9,1883.8 303.6,1836.3 75.5,1824.1 42.9,1173.7 85.0,762.8 57.6,508.8 90.5,200.8 71.6,142.5 471.3,65.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[823.0,1497.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.967394,33.405628]}},{"type":"Feature","properties":{"resourceCoords":[709.0,433.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.97159,33.407494]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"66.3,101.0 80.0,1757.0 79.9,1881.3 1.0,1881.6 1.0,1912.0 1547.7,1912.0 1543.0,1643.6 1578.2,1643.7 1539.5,1606.8 1552.5,1010.0 1484.5,513.7 1557.9,222.6 1536.0,220.3 1533.9,1.0 1495.1,1.0 1495.3,16.4 1401.8,98.7 915.2,60.1 110.8,124.8 66.3,101.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95875870079635,33.40377515278497]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95674096231649,33.40623538237611]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95327027804538,33.40422357400048]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95528801652524,33.40176334440934]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0030__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p30 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.35"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2325.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5326.4"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0030__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0030","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1426.8,583.0 1426.8,583.0 1378.2,604.6 102.4,594.7 27.4,630.1 22.0,1776.2 1.0,1830.5 1.0,1844.7 3.6,1875.2 392.7,1793.5 393.1,1813.4 1266.1,1800.5 1270.7,1778.0 1499.0,1905.0 1543.8,1851.8 1534.1,1585.0 1527.5,1520.2 1499.3,1535.7 1454.4,1471.8 1453.3,964.4 1514.3,921.4 1522.3,846.3 1531.0,840.2 1530.2,737.3 1462.1,739.7 1426.8,583.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0030__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[729.0,1107.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.975206,33.410074]}},{"type":"Feature","properties":{"resourceCoords":[36.0,1465.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.975689,33.40714]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0032__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p32 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.47"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0032__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0032","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1157.7,977.5 1157.5,977.6 937.2,850.4 914.8,836.2 870.6,488.6 894.0,256.9 868.0,68.2 387.3,16.0 91.5,90.2 54.1,270.2 72.7,296.9 37.1,568.0 49.1,1589.0 46.2,1590.5 82.2,1753.8 151.4,1751.7 151.6,1856.3 234.6,1798.5 441.6,1830.2 493.1,1803.2 646.4,1859.0 684.3,1850.3 677.8,1828.4 997.2,1825.8 1080.7,1794.0 1120.2,1819.2 1345.8,1732.5 1468.8,1725.9 1491.5,1758.5 1555.1,1635.0 1540.1,906.4 1387.3,876.5 1159.1,978.3 1157.7,977.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0032__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[661.0,690.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.97708,33.417201]}},{"type":"Feature","properties":{"resourceCoords":[387.0,279.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.979291,33.417239]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p34","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.70"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0034","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"25.5,742.5 55.4,299.4 25.7,125.8 85.7,45.5 1192.7,21.4 1536.8,74.2 1585.4,587.4 1555.0,964.7 1589.6,1632.7 1564.1,1861.4 282.2,1880.8 186.5,1902.4 119.5,1858.2 76.1,1858.7 77.3,1144.0 77.8,1008.5 53.4,1008.5 25.5,742.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,785.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9534864,33.4169987]}},{"type":"Feature","properties":{"resourceCoords":[792.0,79.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9560767,33.4184651]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0035/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0035","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1556.7,150.7 1562.6,149.1 1527.7,542.3 1523.1,543.5 1542.0,717.5 1548.7,715.8 1548.5,820.3 1551.7,819.5 1514.7,1021.4 1506.6,1016.5 1421.0,1324.7 1396.8,1318.1 1365.0,1437.3 1337.3,1816.1 1370.6,1822.9 1221.0,1853.8 702.9,1863.0 517.5,1857.8 401.3,1818.4 228.2,1829.5 183.6,1794.4 98.6,1813.2 79.9,1450.3 118.6,1404.7 85.2,987.0 111.7,866.5 72.7,720.3 70.3,403.9 96.3,369.6 80.7,311.1 151.5,210.0 136.6,139.6 151.7,166.9 257.7,138.6 377.8,192.6 496.1,196.2 543.7,242.2 652.1,252.3 827.4,205.5 819.3,102.0 867.5,77.3 1035.8,48.0 1509.8,93.6 1566.6,78.4 1556.7,150.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1415.0,194.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95283282888519,33.43285890182448]}},{"type":"Feature","properties":{"resourceCoords":[602.0,1122.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.94989756219273,33.42920193448264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p36","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.76"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0036","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.9,149.4 98.0,69.3 215.3,64.5 246.4,33.7 747.4,12.5 1499.5,35.8 1588.9,229.3 1601.5,577.8 1521.7,1154.2 1454.3,1222.4 1515.5,1354.8 1544.2,1827.5 1030.8,1875.1 861.8,1821.3 572.1,1827.4 487.0,1875.0 231.1,1873.7 133.7,1912.0 97.6,1912.0 60.6,1538.2 71.5,1416.7 96.2,1418.9 127.7,1104.2 136.4,1107.6 138.3,904.6 135.4,906.0 117.9,804.1 111.7,806.9 63.9,640.5 68.2,638.6 35.9,249.5 30.4,252.0 27.9,179.9 93.9,149.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1185.0,1042.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9476629,33.435974]}},{"type":"Feature","properties":{"resourceCoords":[70.0,1433.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.948149,33.431731]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p38 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.50"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5235.2"},{"label":"split_canvas_w","value":"2696.0"},{"label":"split_canvas_h","value":"2416.8"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"405.8,1379.4 302.6,1371.7 322.6,1340.9 237.0,1326.1 141.4,1384.3 51.5,1390.0 48.2,1417.2 32.9,1420.3 2.3,1355.8 1.0,1699.0 1.0,1910.2 174.1,1912.0 378.0,1912.0 378.2,1874.2 568.2,1819.0 568.4,1792.3 567.5,1782.3 573.2,1418.8 425.0,1416.4 426.1,1366.1 405.8,1379.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1308.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95838706585225,33.41225712219969]}},{"type":"Feature","properties":{"resourceCoords":[674.0,1308.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95594531764432,33.41091240056157]}},{"type":"Feature","properties":{"resourceCoords":[674.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9573811973561,33.40906990619822]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95982294556403,33.41041462783634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p38 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"21"},{"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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.8,904.6 39.4,905.2 60.9,1295.9 257.5,1302.2 340.6,1289.4 362.4,1257.1 656.3,1258.5 717.2,1348.2 699.4,1592.0 735.8,1851.5 840.2,1863.5 903.1,1833.9 935.5,1868.7 1109.1,1873.2 1491.9,1844.6 1531.9,1826.2 1570.8,1690.5 1572.7,889.1 1583.9,886.6 1517.4,842.9 1474.3,843.4 1474.8,134.4 1475.2,1.0 1451.0,1.0 1453.7,25.7 1364.0,86.7 1296.6,71.2 1157.6,117.7 519.4,79.3 466.2,1.0 416.5,1.0 416.1,143.9 61.6,145.6 60.8,850.5 60.8,904.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0038__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[769.0,1377.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.951128,33.409281]}},{"type":"Feature","properties":{"resourceCoords":[769.0,140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9557,33.411875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0039","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1509.6,356.6 1424.5,355.9 1422.8,385.7 1506.4,386.6 1494.5,1087.4 1503.9,1087.5 1501.0,1265.5 1502.1,1804.9 1501.7,1858.5 796.1,1812.0 795.4,1803.2 45.7,1801.2 31.2,1235.8 83.6,773.6 26.0,460.1 55.7,74.8 427.6,23.2 1307.0,18.0 1516.0,49.3 1541.4,230.3 1580.7,285.0 1509.6,356.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.97213632006093,33.39518951796007]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.96815989520404,33.40016745417324]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.961138142166,33.39620232115034]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9651145670229,33.39122438493717]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0040","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.4,1545.4 132.7,995.9 133.8,911.4 74.8,679.8 140.7,418.0 141.2,380.4 142.6,284.9 142.8,267.1 143.2,237.3 471.2,3.8 538.4,4.0 539.1,4.0 591.0,4.2 769.5,8.2 996.8,11.6 1612.0,84.5 1612.0,109.5 1583.7,128.5 1600.0,152.8 1561.4,200.8 1560.7,338.3 1530.2,358.7 1525.3,423.9 1575.8,677.3 1594.5,1668.0 1612.0,1681.5 1612.0,1734.1 1612.0,1807.8 1511.5,1806.7 291.0,1793.5 241.4,1545.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[946.0,1054.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.9537982359719,33.39009773987003]}},{"type":"Feature","properties":{"resourceCoords":[1502.0,1800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.95359374906536,33.38668318490821]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1561.3,1133.2 1565.0,1483.0 1580.2,1846.0 1488.4,1847.6 1488.8,1876.8 60.9,1840.4 109.0,1040.4 70.7,460.7 137.2,58.1 960.2,32.1 1261.3,108.9 1490.3,30.6 1597.0,197.4 1572.1,1043.8 1612.0,1101.4 1612.0,1133.3 1561.3,1133.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.96395480912786,33.40665987094393]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.96193072641726,33.40911766056706]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95846333160446,33.40709961544918]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.96048741431505,33.40464182582605]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bessemer, Alabama | 1950 | sanborn00014_010 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:20:56Z","modified":"2026-10-18T22:20:56Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"166.9,1.0 99.3,1.0 99.7,179.4 109.7,1792.2 153.9,1792.2 295.6,1912.0 1528.1,1912.0 1528.7,1789.5 1520.0,143.8 1355.2,54.6 1103.2,147.8 234.1,133.7 166.9,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd397m:g3974m:g3974bm:g3974bm_g000141950:00014_1950-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9606605245995,33.40158370847295]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.9586390068988,33.404064659400696]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95513917552198,33.4020490340703]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-86.95716069322268,33.39956808314256]}}]}}]}