{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02588_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Burlington, Iowa | 1888 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"40"},{"label":"placed","value":"25"},{"label":"unplaced","value":"15"},{"label":"fit sources","value":"georef-snap 19, georef 5, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 20 panels"},{"label":"unplaced pages","value":"p13 (tier 4, 40.81166,-91.10847 +/-1728m); p20__1 (tier 1, 40.78937,-91.09865 +/-203m); p23__1 (tier 4, 40.81166,-91.10847 +/-1728m); p23__3 (tier 4, 40.81166,-91.10847 +/-1728m); p25__1 (tier 1, 40.81494,-91.11764 +/-215m); p25__2 (tier 3, 40.81831,-91.11037 +/-1008m); p26__1 (tier 1, 40.81836,-91.11714 +/-100m); p26__2 (tier 1, 40.80037,-91.11940 +/-111m); p26__4 (tier 1, 40.80768,-91.12462 +/-100m); p26__5 (tier 1, 40.81839,-91.11654 +/-100m); p26__6 (tier 1, 40.80872,-91.12396 +/-100m); p26__7 (tier 1, 40.80912,-91.12559 +/-128m); p26__8 (tier 1, 40.81919,-91.11860 +/-111m); p27__1 (tier 4, 40.81166,-91.10847 +/-1728m); p27__2 (tier 4, 40.81166,-91.10847 +/-1728m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.65"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.8,1849.4 975.4,1848.9 532.2,1848.7 305.5,1846.6 53.0,1850.2 41.4,1381.6 38.2,823.6 45.7,406.0 45.8,140.6 72.7,37.1 159.4,29.1 450.5,122.6 741.2,46.0 959.5,143.9 1227.6,65.9 1519.8,107.3 1595.0,561.2 1548.0,1647.0 1581.1,1772.5 1538.5,1800.8 1541.4,1912.0 1502.2,1912.0 1495.3,1846.7 1026.8,1849.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[66.0,817.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10262249753107,40.813765870465026]}},{"type":"Feature","properties":{"resourceCoords":[1487.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.09985186826793,40.811213689983624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.1,1797.6 92.6,1312.7 93.7,742.9 87.5,743.0 64.2,169.1 83.6,168.8 324.1,167.2 564.0,160.3 563.9,141.9 882.6,81.7 882.2,47.0 1479.7,57.6 1536.5,42.2 1542.7,17.8 1544.3,290.6 1539.3,719.9 1546.0,1293.2 1561.0,1774.7 1001.1,1781.8 340.1,1793.5 93.1,1797.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1056.0,1302.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10419189124374,40.81296767271384]}},{"type":"Feature","properties":{"resourceCoords":[1056.0,167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10347478164945,40.81497701179822]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0012","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1069.5,11.7 292.3,59.1 285.4,31.8 73.2,36.3 19.4,89.6 20.9,202.2 15.3,1568.2 15.6,1837.4 490.0,1842.5 1047.5,1850.0 1047.5,1844.0 1609.2,1827.7 1608.5,1593.7 1608.1,1358.4 1605.5,1133.9 1598.1,1137.2 1601.4,140.4 1531.4,1.0 1119.0,1.0 1069.5,11.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[47.0,1374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1078493432557,40.81282446485873]}},{"type":"Feature","properties":{"resourceCoords":[1583.0,1374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10690011223737,40.81561226644245]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1072.8,80.4 1497.3,136.3 1575.4,249.9 1586.5,701.9 1612.0,695.2 1612.0,1138.6 1493.6,1912.0 1465.2,1912.0 1472.5,1874.1 764.4,1808.0 67.1,1829.1 31.5,1677.3 64.0,1573.8 108.7,1586.6 124.4,1250.3 54.9,625.5 82.0,221.1 426.5,211.0 684.8,199.7 680.7,139.7 1072.3,89.7 1071.8,80.2 1072.8,80.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.1142851160046,40.81753154546586]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11037276937272,40.81741019987041]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11056159580785,40.813873813123436]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11447394243973,40.81399515871889]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.61"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"614.8,1889.6 959.4,1902.0 1218.0,1907.4 1217.7,1847.2 1612.0,1822.8 1612.0,1813.3 1572.5,1805.5 1514.5,264.4 1612.0,271.8 1612.0,249.1 1269.1,1.0 1267.1,1.0 1252.5,23.8 1003.2,21.4 956.2,19.7 50.3,46.4 119.2,537.0 56.9,1287.0 106.7,1353.9 105.3,1711.4 59.8,1768.7 94.2,1864.3 615.4,1884.3 614.8,1889.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11571091519937,40.82058247623771]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11179808467723,40.82065501381358]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11168520484968,40.817118307942614]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11559803537182,40.81704577036675]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"14.2,440.6 40.2,438.6 50.7,1175.5 110.5,1318.4 45.6,1765.4 94.7,1872.6 322.5,1869.5 561.3,1868.5 818.0,1867.3 1056.8,1867.9 1295.0,1863.4 1295.0,1845.1 1612.0,1788.3 1612.0,1753.9 1574.3,1752.9 1575.2,160.2 1528.6,96.9 1415.2,96.2 1396.3,1.0 1288.3,1.0 1288.7,67.8 809.2,127.5 809.1,117.2 319.5,190.6 319.1,136.6 14.2,440.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1298.0,1181.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10419524171115,40.81644244082888]}},{"type":"Feature","properties":{"resourceCoords":[314.0,1181.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10651932895068,40.81689973765463]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1555.4,1881.0 660.0,1880.5 371.2,1777.4 129.2,1783.2 123.3,1912.0 95.8,1901.7 91.8,1664.7 76.0,1038.7 71.4,730.4 52.8,729.6 44.0,75.3 87.2,37.5 1494.6,86.0 1469.8,191.5 1536.2,206.6 1484.7,689.3 1474.6,687.0 1434.1,1182.7 1381.2,1170.6 1608.6,1538.5 1555.4,1881.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[802.0,554.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10433441844394,40.81980146705301]}},{"type":"Feature","properties":{"resourceCoords":[99.0,1674.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10701345237004,40.82114306375579]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1304.5,1830.8 680.0,1836.3 443.7,1836.5 34.3,1836.7 33.6,854.6 44.9,854.5 41.3,249.1 71.7,24.0 1249.6,22.4 1513.6,100.8 1590.0,532.0 1577.8,1812.7 1612.0,1812.7 1612.0,1831.2 1304.5,1830.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[670.0,41.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10698166546075,40.82446566802111]}},{"type":"Feature","properties":{"resourceCoords":[1301.0,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10547769377798,40.82115324051355]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"37.2,226.9 100.8,70.5 1351.9,21.0 1544.8,87.3 1546.2,1862.7 56.1,1871.6 37.2,226.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1110.0,537.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11060452031724,40.80552649710782]}},{"type":"Feature","properties":{"resourceCoords":[682.0,1508.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11146092514082,40.80367977169572]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"81.5,58.8 554.6,55.1 1028.1,46.2 1492.0,50.4 1494.8,304.1 1492.0,531.9 1490.4,977.1 1489.8,1028.8 1491.0,1499.6 1425.5,1506.3 1425.3,1545.7 1537.1,1543.1 1565.3,1586.0 1524.6,1596.6 1509.3,1823.6 974.3,1881.1 141.9,1852.5 95.3,1912.0 82.0,1912.0 70.0,1538.8 87.0,1538.8 81.2,1034.1 80.6,541.4 81.5,58.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1023.0,1041.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10122616771818,40.810570000304054]}},{"type":"Feature","properties":{"resourceCoords":[101.0,68.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10413508120534,40.809356158629534]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0020__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p20 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.73"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2811.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3640.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0020__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"780.8,298.4 777.4,1463.0 905.9,1777.5 1231.2,1886.4 1536.2,1875.5 1604.3,1581.5 1546.3,853.4 1580.6,237.8 1298.2,214.3 1298.3,199.2 1299.0,192.7 810.0,137.1 806.5,304.4 780.8,298.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0020__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[812.7,1531.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1020991,40.8004065]}},{"type":"Feature","properties":{"resourceCoords":[812.7,13.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1032994,40.8031222]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.49"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"28.6,1816.8 36.3,48.9 460.9,34.1 632.2,100.8 1556.0,49.1 1608.0,751.9 1578.1,1868.8 65.8,1876.0 28.6,1816.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.12273932544208,40.80825032296925]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.1188804413083,40.80825077428058]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11887973912332,40.804762202694924]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.12273862325709,40.804761751383595]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p22 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"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":"2736.0"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"57.9,380.3 41.2,380.3 53.0,614.0 111.4,679.2 1534.6,555.6 1534.1,631.5 1534.9,631.5 1545.4,631.5 1534.5,113.5 1176.8,41.0 658.6,142.7 403.2,41.2 133.1,84.8 88.7,1.0 65.2,1.0 61.9,75.8 57.9,380.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11229307343349,40.82415065744282]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.10835406253977,40.82414988427706]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,684.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.10835449276401,40.822876942939274]}},{"type":"Feature","properties":{"resourceCoords":[0.0,684.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.11229350365772,40.82287771610503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p22 [2]","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":"2526.0"},{"label":"split_canvas_w","value":"3878.0"},{"label":"split_canvas_h","value":"5126.0"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"291.9,1589.5 671.8,1816.8 672.9,1817.4 709.0,1839.0 862.3,1836.7 908.6,1760.2 917.6,680.6 883.2,683.5 883.2,684.0 876.5,684.0 487.1,716.5 453.4,762.8 258.1,695.0 42.3,760.8 42.1,1641.6 1.0,1646.6 1.0,1648.0 46.8,1644.2 294.5,1624.0 291.9,1589.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[267.9,1319.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11268670364585,40.82115821561998]}},{"type":"Feature","properties":{"resourceCoords":[267.9,780.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1125997973413,40.822148367026394]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p22 [3]","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":"3878.0"},{"label":"split_canvas_y","value":"2526.0"},{"label":"split_canvas_w","value":"2574.0"},{"label":"split_canvas_h","value":"5126.0"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1474.4,1893.8 1491.0,1893.9 1496.3,1589.5 1502.0,1473.8 1495.2,1460.8 1490.8,772.2 1169.8,654.4 1142.1,654.1 1045.8,725.7 1045.9,786.8 1091.5,1002.4 1104.2,1422.9 1030.8,1647.2 1073.6,1792.4 1471.8,1837.6 1474.4,1893.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0022__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1047.5,656.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11325629824475,40.82574237807855]}},{"type":"Feature","properties":{"resourceCoords":[1502.1,656.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11213766115968,40.825745992359344]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0023__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p23 [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":"3796.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2655.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0023__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1024.2,1797.3 1365.9,1848.6 1517.4,1789.5 1556.7,1198.4 1497.6,119.2 1036.4,137.8 1024.2,1797.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0023__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1313.0,263.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11437484925901,40.7982291587635]}},{"type":"Feature","properties":{"resourceCoords":[1213.0,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1151217326247,40.79546889753406]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p24","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"76.5,61.8 440.6,20.4 839.9,105.0 1185.6,50.0 1493.2,135.1 1527.9,192.2 1444.4,401.3 1497.0,754.1 1433.8,901.2 1533.6,1856.7 713.3,1871.2 550.1,1787.4 117.0,1783.4 45.2,1676.1 76.5,61.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.1006443846206,40.799519946474426]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.09687250410957,40.800450820751095]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.09541291930621,40.79706720663618]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.09918479981724,40.79613633235951]}},{"type":"Feature","properties":{"resourceCoords":[69.0,769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.0998963,40.7981996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0026__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p26 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.48"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4490.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1962.0"},{"label":"split_canvas_h","value":"3926.4"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0026__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1585.5,849.5 1594.8,238.8 1497.5,50.7 1316.0,46.5 1230.7,244.9 1165.5,240.8 1172.0,947.2 1412.0,947.7 1585.5,849.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0026__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1486.1,445.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.12486511549963,40.80866851436239]}},{"type":"Feature","properties":{"resourceCoords":[1486.1,945.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1247880882929,40.80774211522204]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p3","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"118.3,1631.8 61.4,1647.4 1.0,1648.9 1.0,1673.5 578.4,1772.3 577.7,1632.2 889.3,1633.0 1540.2,1642.5 1536.3,1160.0 1527.0,677.1 1531.0,204.0 972.5,206.2 313.3,212.0 90.4,213.8 86.3,684.9 78.4,685.0 76.4,1160.8 78.5,1416.4 93.7,1527.7 118.3,1631.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1060.0,1160.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1050026,40.8104066]}},{"type":"Feature","properties":{"resourceCoords":[1531.0,204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1033092,40.8118893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"726.9,1585.5 222.8,1758.8 145.6,1785.9 95.3,1191.2 82.0,1148.5 120.1,1141.8 104.9,481.1 83.0,481.0 81.1,42.2 580.9,45.2 1093.0,43.0 1092.9,60.4 1488.2,50.5 1562.4,109.6 1589.7,426.4 1571.7,1815.7 1509.9,1868.9 1201.5,1884.3 1199.8,1879.8 778.2,1734.6 726.9,1585.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[580.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10210897849643,40.808036529876695]}},{"type":"Feature","properties":{"resourceCoords":[98.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10325040335447,40.80825470511528]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"238.7,67.3 527.2,71.7 727.4,72.2 1262.9,77.1 1261.5,235.6 1612.0,514.3 1586.9,511.7 1568.4,1658.2 1569.5,1664.6 1282.0,1707.1 1278.5,1692.1 1277.8,1685.5 776.4,1744.2 811.9,1912.0 805.4,1912.0 784.9,1912.0 770.2,1848.8 80.1,1828.7 28.7,1669.3 82.3,857.2 21.6,402.6 36.3,87.4 81.5,14.9 238.7,67.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[764.0,1617.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10326627904062,40.8031296812749]}},{"type":"Feature","properties":{"resourceCoords":[1263.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10240390150457,40.806022517063155]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p6","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.7,1728.8 129.4,1723.4 50.6,1461.3 34.4,1376.4 62.0,485.0 62.7,406.2 71.2,6.7 379.1,15.6 1022.2,41.8 1508.7,55.2 1502.5,491.3 1524.3,491.8 1527.3,1148.6 1489.3,1154.5 1501.7,1197.2 1540.8,1789.1 1430.0,1825.8 1157.8,1912.0 993.8,1912.0 1000.5,1883.8 427.0,1883.4 110.6,1810.4 112.7,1728.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1005.0,1226.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1048709,40.8071871]}},{"type":"Feature","properties":{"resourceCoords":[62.0,485.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1067147,40.8089275]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p7","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"31.6,513.2 29.9,513.2 15.8,41.3 537.6,39.3 663.5,38.7 720.1,23.2 1009.2,13.8 1067.8,28.4 1010.9,44.0 949.5,45.5 949.5,70.0 1527.6,169.4 1528.7,433.3 1530.0,513.0 1524.9,1414.8 1543.4,1500.2 1612.0,1709.2 1612.0,1851.3 1542.6,1837.2 1336.7,1890.7 121.8,1880.5 29.5,1496.0 31.6,513.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1530.0,513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1067147,40.8089275]}},{"type":"Feature","properties":{"resourceCoords":[1036.0,1503.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.1084817,40.8073933]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.59"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1590.1,1113.8 1522.6,1907.3 1045.2,1879.2 1045.0,1880.9 53.4,1790.5 93.0,1482.6 45.0,338.2 98.7,73.1 849.8,15.5 1109.9,39.9 1160.0,114.3 1521.5,114.2 1598.5,259.6 1597.6,1110.8 1612.0,1111.9 1590.1,1113.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,430.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11398126045351,40.808655361710244]}},{"type":"Feature","properties":{"resourceCoords":[944.0,265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.11410301973946,40.80992260807392]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Iowa | 1888 | sanborn02588_001 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T12:52:21Z","modified":"2026-10-19T12:52:21Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1275.8,19.2 1522.5,69.7 1540.1,52.4 1541.3,166.9 1531.4,1554.8 1530.8,1828.3 1530.9,1851.7 1061.3,1844.9 1061.2,1837.0 586.9,1832.2 332.1,1832.8 221.1,1847.3 117.2,1871.2 132.1,1812.9 124.1,1524.5 109.0,1468.0 109.0,1342.5 110.6,38.3 132.8,34.5 1275.8,19.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154bm:g025881888:02588_1888-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[585.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10735744751896,40.81086591780459]}},{"type":"Feature","properties":{"resourceCoords":[1517.0,1815.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.10679730731471,40.812532028334076]}}]}}]}