{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03830_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Revere, Massachusetts | 1900 | 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":"51"},{"label":"placed","value":"27"},{"label":"unplaced","value":"24"},{"label":"fit sources","value":"georef-snap 19, georef 7, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"12 sheet(s) cut into 35 panels"},{"label":"unplaced pages","value":"p11 (tier 1, 42.41370,-70.99153 +/-269m); p12__1 (tier 1, 42.41615,-70.98893 +/-210m); p12__2 (tier 1, 42.40445,-71.00297 +/-107m); p12__3 (tier 3, 42.41863,-70.98850 +/-2157m); p13__1 (tier 1, 42.40521,-71.00527 +/-130m); p13__2 (tier 1, 42.40310,-71.00795 +/-100m); p13__3 (tier 3, 42.40298,-71.00633 +/-717m); p14__1 (tier 3, 42.41113,-70.99076 +/-717m); p14__2 (tier 1, 42.41340,-70.98964 +/-100m); p15__1 (tier 1, 42.39929,-70.99088 +/-100m); p17__2 (tier 1, 42.39225,-70.98472 +/-100m); p19__2 (tier 1, 42.38224,-70.97311 +/-110m); p24__1 (tier 1, 42.37253,-70.97477 +/-114m); p24__3 (tier 1, 42.38250,-70.97736 +/-128m); p24__4 (tier 1, 42.37232,-70.97387 +/-111m); p29__1 (tier 1, 42.42030,-70.98610 +/-179m); p29__2 (tier 1, 42.40841,-70.99132 +/-185m); p2__2 (tier 1, 42.41514,-71.01963 +/-100m); p2__3 (tier 1, 42.41406,-71.01848 +/-100m); p3__3 (tier 1, 42.35791,-70.97188 +/-100m); p3__4 (tier 1, 42.35772,-70.97107 +/-105m); p6__2 (tier 1, 42.40885,-71.00693 +/-201m); p6__3 (tier 1, 42.40758,-71.00776 +/-100m); p7__3 (tier 1, 42.40422,-71.01749 +/-113m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,459.9 1.0,693.5 58.1,773.3 26.4,772.5 64.7,1875.2 1365.3,1818.2 1501.5,1787.6 1573.5,1641.4 1582.0,463.7 1514.1,444.6 1493.3,119.6 1207.3,121.6 957.1,126.7 956.8,145.6 551.1,101.9 551.2,105.0 151.8,20.6 156.1,165.7 117.1,232.6 188.5,330.6 1.0,459.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[562.0,860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.99313791274288,42.4067535185361]}},{"type":"Feature","properties":{"resourceCoords":[1542.0,1445.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.99129392305238,42.408349268144775]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0015__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p15 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0015__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0015","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"50.1,96.9 44.1,966.8 155.6,1133.1 186.8,1272.9 139.7,1349.1 212.0,1611.5 225.5,1611.5 225.5,1660.4 270.5,1823.8 359.1,1889.4 1562.1,1886.3 1607.9,1654.3 1579.3,1538.8 1588.2,1539.2 1583.2,1159.1 1585.5,1159.2 1578.5,793.1 1582.6,792.8 1577.5,440.7 1561.7,443.9 1569.5,113.5 1333.2,40.2 827.3,31.2 822.2,1.0 657.5,1.0 304.8,207.7 203.1,16.5 50.1,96.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0015__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[373.0,137.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.99111051780652,42.39908155248473]}},{"type":"Feature","properties":{"resourceCoords":[1551.0,588.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98931863579618,42.39720667002583]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"126.1,25.4 125.4,34.3 503.5,40.6 503.4,43.0 867.6,47.0 867.8,51.1 1218.1,56.6 1215.4,40.8 1543.7,58.5 1592.0,455.2 1541.7,1166.1 1578.9,1822.1 1413.3,1896.8 1317.8,1801.2 1261.3,1779.5 1126.5,1777.3 1078.5,1794.4 1017.7,1835.5 965.9,1895.2 954.1,1912.0 950.2,1828.0 592.5,1859.8 584.5,1818.1 218.5,1887.2 43.1,1904.7 80.8,1891.3 15.0,1828.1 69.3,748.9 35.2,56.1 10.3,50.4 126.1,25.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[219.0,305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98985634077881,42.39561344339585]}},{"type":"Feature","properties":{"resourceCoords":[202.0,1905.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98652295852749,42.39403191010195]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0017__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p17 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0017__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"273.5,20.1 48.2,60.0 30.2,319.6 72.5,648.5 22.2,1606.6 80.8,1747.5 312.9,1832.2 354.6,1912.0 408.1,1912.0 712.2,1912.0 794.2,1858.6 823.5,1849.5 880.1,1908.4 872.8,1890.7 1310.7,1826.6 1367.3,1621.9 1608.5,1482.2 1574.0,244.4 1606.7,235.8 1529.5,127.4 1478.0,97.1 1347.4,73.0 1298.0,81.8 1232.2,111.7 1172.0,161.3 1159.9,176.1 1157.9,175.8 1167.8,93.4 814.8,66.0 813.9,24.2 446.8,31.7 273.5,20.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0017__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[835.0,758.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98447936930312,42.394222182145185]}},{"type":"Feature","properties":{"resourceCoords":[471.0,32.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98651451052,42.39411598338175]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.2,364.4 111.5,42.8 947.5,22.8 1184.1,89.0 1436.7,42.6 1581.5,85.9 1579.5,1541.9 1492.7,1785.5 1136.6,1751.7 117.1,1886.8 32.1,1861.7 22.0,1788.6 57.0,1750.7 86.6,857.7 58.0,865.8 43.2,364.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,1206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97351449382239,42.383610631291106]}},{"type":"Feature","properties":{"resourceCoords":[1279.0,757.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97402523113286,42.38510849088773]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0019__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p19 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0019__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"607.5,84.5 680.8,103.0 619.6,670.0 329.8,896.1 69.1,805.9 146.7,897.5 131.6,1821.4 192.3,1896.6 640.0,1853.9 640.2,1847.5 1524.5,1652.9 1514.0,1581.2 1549.8,1581.0 1597.4,741.2 1580.0,683.5 1535.4,673.6 1492.2,373.4 1465.1,329.0 607.5,54.6 607.5,84.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0019__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[663.0,1576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97477866024786,42.38014343038652]}},{"type":"Feature","properties":{"resourceCoords":[600.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97489134619352,42.38084480315488]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0020","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"426.2,1912.0 578.0,1912.0 569.3,1885.1 1511.7,1659.2 1521.8,1705.1 1570.8,1722.3 1566.8,1712.6 1578.2,724.1 1522.1,589.1 1528.1,113.3 1438.4,82.3 1460.2,7.8 1430.1,1.0 1425.6,1.0 1419.8,71.2 526.9,61.6 525.3,67.8 85.6,9.3 102.6,44.2 30.9,75.2 114.5,904.9 46.5,1318.0 128.2,1795.2 426.2,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[411.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97448447476968,42.37688685053168]}},{"type":"Feature","properties":{"resourceCoords":[411.0,399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97500262225451,42.37898643642752]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"338.5,1625.0 149.6,940.5 161.3,594.3 316.6,73.5 303.7,64.4 450.8,100.2 448.8,71.8 1431.6,83.5 1430.3,130.9 1474.4,159.9 1540.2,587.1 1479.2,775.2 1545.2,1180.5 1513.9,1374.0 1552.7,1407.7 1513.5,1912.0 1485.5,1912.0 1457.5,1912.0 1450.4,1793.7 626.3,1574.1 629.8,1633.5 418.0,1642.9 413.4,1590.4 308.2,1715.2 338.5,1625.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.97502691961114,42.3760855413307]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.97136529288252,42.37731806042911]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.96940043570369,42.37408735066277]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.9730620624323,42.37285483156436]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"178.1,1476.3 87.7,1318.0 90.8,1004.8 145.8,894.9 84.4,759.3 257.5,304.9 366.3,185.0 368.8,237.2 577.9,235.4 577.0,176.4 1380.5,423.3 1382.7,540.8 1437.9,542.8 1497.2,44.6 1515.3,61.6 1537.9,662.4 1428.1,914.4 1515.3,966.0 1460.4,1075.8 1528.2,1198.6 1515.3,1708.9 1412.0,1673.4 1332.0,1822.3 1341.5,1766.8 617.9,1642.0 610.0,1674.6 133.7,1556.5 178.1,1476.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[598.0,553.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97151503134073,42.373294287555204]}},{"type":"Feature","properties":{"resourceCoords":[598.0,903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.97111929107989,42.37270956425423]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p23","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"23"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1539.9,203.8 1565.6,1813.2 1475.0,1887.5 256.1,1893.7 55.7,1867.3 24.2,1788.9 49.4,486.8 117.6,490.8 139.9,304.6 227.4,321.9 307.6,80.5 810.1,109.5 812.0,75.2 1564.9,64.1 1565.8,121.8 1539.9,203.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[876.0,767.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9696184,42.3703119]}},{"type":"Feature","properties":{"resourceCoords":[641.0,480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9703698,42.370697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0024__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p24 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5504.8"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0024__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1128.8,1707.1 1291.5,1642.2 1291.5,1619.9 1253.2,1590.7 1194.2,949.9 873.1,555.8 874.4,554.4 873.2,553.1 1063.6,343.8 1249.0,137.3 1273.0,35.8 373.6,44.8 385.3,107.2 410.4,150.1 394.4,155.3 410.2,239.5 786.0,909.5 83.7,1149.0 33.0,1221.7 47.8,1615.8 117.3,1826.1 625.0,1910.5 842.5,1841.2 923.8,1788.9 1128.8,1707.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0024__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[778.1,1104.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98072609765558,42.382308014017724]}},{"type":"Feature","properties":{"resourceCoords":[778.1,1841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9823952415684,42.38172329011468]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.3,654.1 229.5,784.5 1.0,861.6 1.0,982.2 169.2,1404.7 198.0,1498.7 130.2,1493.2 1.0,1667.5 1.0,1669.6 22.5,1666.4 49.8,1868.7 304.5,1894.1 1257.6,1830.4 1312.1,1819.0 1396.2,1654.3 1495.7,1459.6 1522.2,1367.6 1612.0,1219.0 1612.0,1190.9 1581.1,1210.0 1577.5,641.0 1518.3,537.7 1517.8,297.8 1564.5,277.1 1519.3,117.4 1405.3,112.2 1299.4,29.6 208.8,45.9 68.0,25.8 55.6,1.0 1.0,1.0 1.0,125.0 207.3,654.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1420.0,763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98386875357502,42.38173951573052]}},{"type":"Feature","properties":{"resourceCoords":[256.0,752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98469796728816,42.37965193651492]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"235.0,1285.8 114.5,1376.4 534.7,1912.0 551.2,1912.0 548.7,1879.4 548.0,1869.5 699.9,1887.8 749.1,1863.2 1232.8,1873.9 1393.1,1720.0 1459.8,1737.0 1447.0,1638.4 1350.3,1186.4 1370.3,1069.0 1612.0,1030.7 1612.0,897.0 1495.4,332.2 1504.2,280.5 1516.2,210.2 1571.0,219.6 1534.1,98.2 1094.5,35.8 80.3,292.1 33.7,810.8 1.0,814.3 1.0,892.0 235.0,1285.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1000.0,1108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98460949313487,42.37844704305848]}},{"type":"Feature","properties":{"resourceCoords":[1319.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98462070370255,42.379041325545224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0027","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1440.2,1821.4 1591.0,1739.0 1558.8,1702.8 1543.2,1642.2 1486.7,966.7 1484.3,72.0 1472.3,113.0 1214.3,80.9 1154.9,128.5 1023.7,30.0 305.2,22.0 199.2,51.5 199.5,108.5 108.2,97.5 35.1,213.6 144.4,313.8 149.5,305.6 178.9,287.9 207.3,947.2 61.2,950.6 22.9,1395.0 1.0,1425.5 1.0,1466.7 37.5,1487.3 60.0,1605.7 124.0,1593.1 173.3,1807.8 424.1,1795.2 508.7,1875.5 1261.4,1894.8 1485.0,1822.0 1440.2,1821.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[729.0,1451.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98464927769396,42.37542653487441]}},{"type":"Feature","properties":{"resourceCoords":[656.0,191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.98190974038887,42.37673033107779]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p28","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0028","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"193.5,1825.1 160.0,1788.5 143.0,1726.5 75.1,1034.0 59.5,115.6 81.5,35.7 247.8,19.0 1274.0,33.6 1444.2,85.3 1579.2,216.9 1611.8,1459.2 1571.6,1760.0 1307.9,1864.0 1011.2,1892.2 852.5,1880.0 832.8,1794.8 573.9,1769.1 413.3,1805.5 420.8,1867.5 193.1,1875.4 86.0,1912.0 40.0,1912.0 193.5,1825.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1096.0,1034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9813668,42.3729582]}},{"type":"Feature","properties":{"resourceCoords":[351.0,1034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9822653,42.374173]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0029__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p29 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.43"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4880.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"2772.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0029__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0029","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.2,1885.3 1426.9,1908.2 1576.8,1528.9 1531.9,1361.0 1392.7,1276.1 1051.5,1323.2 680.2,1243.6 61.3,1245.6 53.2,1885.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0029__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1220.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.98986463495538,42.36894945730679]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1220.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.98913820357826,42.37193638543062]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.98741341279452,42.37170417555908]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-70.98813984417164,42.36871724743525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p2 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1159.9,1892.8 1265.0,1816.9 1296.0,1562.7 1563.2,1565.3 1566.8,1258.7 1473.5,1175.8 1475.5,1096.8 1204.4,1079.7 1189.0,1079.7 1189.0,1078.7 1186.9,1078.6 1151.6,856.8 1189.0,775.4 1189.0,758.5 1196.7,758.5 1199.2,753.0 1570.5,740.6 1583.0,352.3 1497.5,227.4 1490.3,81.4 1160.7,15.8 43.5,85.7 47.2,1657.9 122.7,1692.5 139.6,1780.2 285.7,1773.0 324.0,1876.2 396.1,1880.8 401.5,1831.8 502.7,1872.5 510.4,1893.5 680.7,1876.4 680.7,1868.2 1127.8,1883.1 1159.9,1892.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[683.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0167995,42.4133105]}},{"type":"Feature","properties":{"resourceCoords":[683.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0193689,42.4140141]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p3 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"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":"3258.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"40.0,40.9 128.7,238.4 43.9,686.2 101.9,884.3 476.6,926.5 495.7,926.5 496.0,926.5 496.0,928.7 500.6,929.2 496.0,1109.8 496.0,1120.0 495.8,1120.0 495.6,1124.7 110.8,1127.6 66.5,1510.8 212.8,1785.1 592.2,1838.7 600.1,1895.3 629.4,1845.4 699.6,1863.2 713.8,1147.0 716.2,869.0 727.0,605.8 729.4,308.8 731.7,172.6 735.0,37.9 735.6,11.9 465.8,30.2 40.0,40.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[698.6,596.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01216577898471,42.41044538536958]}},{"type":"Feature","properties":{"resourceCoords":[698.6,1639.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01327339046445,42.40862505240507]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p3 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.79"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3258.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3194.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1021.4,1752.0 1021.4,1737.1 968.7,1685.6 1018.3,1143.8 1047.8,1054.7 1178.3,1006.4 1240.7,1069.3 1310.4,1004.5 1468.0,1008.6 1508.0,1095.4 1581.0,1060.6 1495.5,68.8 1501.5,64.4 1469.5,54.6 1023.5,39.4 1023.5,47.5 853.6,64.4 914.5,229.1 855.4,500.9 849.7,633.4 856.1,1000.7 833.5,1009.0 814.5,1451.7 814.5,1610.0 814.5,1732.8 1021.4,1752.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0003__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1469.1,141.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0146141,42.4135832]}},{"type":"Feature","properties":{"resourceCoords":[1021.4,1752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.011234,42.411781]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"83.2,1238.0 103.1,631.3 83.5,518.6 108.6,421.5 113.9,229.8 391.5,183.7 655.9,148.5 952.5,99.0 1088.6,77.7 1223.5,57.4 1449.8,23.5 1513.8,49.1 1486.5,110.7 1571.9,147.7 1596.5,260.3 1597.1,872.0 1507.9,1122.1 1574.8,1335.4 1555.0,1866.1 839.2,1879.1 840.6,1817.4 784.8,1770.4 726.4,1692.2 676.9,1705.7 558.2,1695.7 284.4,1683.0 70.6,1665.2 83.2,1238.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[92.0,1702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.00962607507557,42.40787688104429]}},{"type":"Feature","properties":{"resourceCoords":[1422.0,16.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01128977364854,42.41174528997922]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4.9,1488.8 280.8,1435.6 320.8,1645.5 328.1,1739.5 347.7,1735.8 445.2,1841.4 441.0,1877.4 651.7,1863.5 687.4,1787.8 729.3,1863.3 1555.4,1872.2 1587.1,1738.8 1508.8,1299.0 1556.6,1267.1 1504.7,1189.5 1590.8,1167.7 1410.2,1162.5 1435.7,928.3 1446.7,720.9 1467.5,504.5 1474.3,233.2 1485.2,75.0 1055.8,59.8 445.9,36.1 332.5,55.1 234.9,29.3 42.2,22.8 149.2,744.0 75.6,738.1 54.7,793.2 215.1,1300.8 149.5,1396.4 1.0,1472.8 1.0,1476.5 4.9,1488.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1445.0,839.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.0109009351717,42.4067307793974]}},{"type":"Feature","properties":{"resourceCoords":[126.0,563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01330181225256,42.40854008324698]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p6 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"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":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0006__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.2,1912.0 262.5,1912.0 535.0,1834.4 944.2,1877.2 947.1,1424.3 1007.0,1418.3 1007.0,1411.9 1066.6,1412.3 1435.2,1375.1 1527.7,1264.2 1591.6,1011.5 1533.5,637.9 878.9,643.1 826.1,581.5 767.6,54.9 325.9,17.1 325.2,1.0 260.8,1.0 214.4,58.5 135.3,120.5 150.3,171.2 142.8,293.6 136.0,575.8 122.5,796.4 116.0,958.6 116.9,1236.5 101.9,1458.8 96.7,1671.5 77.4,1912.0 221.2,1912.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[569.0,779.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.00880535139157,42.40743389358476]}},{"type":"Feature","properties":{"resourceCoords":[127.0,1670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01098349207257,42.406570887633634]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p7 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"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":"3861.2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1162.3,964.3 1185.0,964.3 1198.8,964.3 1292.8,854.6 1286.8,835.5 1379.8,817.1 1584.8,752.7 1499.4,483.4 1466.7,405.9 1420.9,274.3 1461.3,88.1 1000.9,215.2 653.2,18.6 43.4,92.8 71.5,960.2 1161.6,960.1 1162.3,964.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1268.0,824.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01459129615081,42.406477278638675]}},{"type":"Feature","properties":{"resourceCoords":[1218.0,658.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.01499334990523,42.40660746790079]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p7 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"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":"3861.2"},{"label":"split_canvas_w","value":"4330.8"},{"label":"split_canvas_h","value":"2406.8"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"206.6,980.6 15.0,1042.2 146.8,1400.6 120.2,1549.5 393.1,1552.2 486.6,1473.6 548.5,1529.2 901.8,1562.5 1053.3,1496.1 995.8,987.2 502.1,1045.5 216.7,1012.5 206.6,980.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[757.8,1277.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9899867,42.4001907]}},{"type":"Feature","properties":{"resourceCoords":[15.0,1042.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9913471,42.3990438]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p7 [4]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.37"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6268.0"},{"label":"split_canvas_w","value":"4330.8"},{"label":"split_canvas_h","value":"1384.0"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1028.5,1789.0 1009.6,1709.9 979.9,1702.9 882.7,1707.4 643.8,1567.0 573.8,1567.0 571.9,1604.4 120.5,1593.3 40.2,1911.1 924.4,1908.7 1019.3,1856.0 1028.5,1789.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0007__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[636.8,1730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9817799,42.3927413]}},{"type":"Feature","properties":{"resourceCoords":[1016.7,1730.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9819108,42.3934429]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.3,157.1 76.0,58.8 457.0,148.2 556.8,164.2 663.0,166.8 1002.8,127.4 1072.3,160.4 1163.2,81.5 1307.7,256.9 1536.6,237.3 1612.0,172.9 1612.0,211.9 1612.0,247.7 1593.0,673.5 1539.7,1864.2 661.4,1843.5 290.7,1894.3 42.9,1838.1 44.5,160.4 84.3,157.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[354.0,775.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9969933449895,42.405372217654545]}},{"type":"Feature","properties":{"resourceCoords":[1177.0,85.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.99456143792797,42.40622688744844]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Revere, Massachusetts | 1900 | sanborn03830_003 p9","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:10:33Z","modified":"2026-10-19T10:10:33Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1612.0,248.0 1612.0,304.3 1308.5,411.2 1387.0,682.6 1458.8,919.3 1477.0,914.5 1544.0,1312.0 1547.0,1311.1 1573.7,1713.6 1385.6,1772.8 1281.2,1790.0 1180.8,1793.0 791.5,1777.0 818.0,1871.6 779.7,1882.3 83.8,1801.9 30.2,1418.0 64.2,101.7 200.5,101.2 243.9,40.5 713.0,99.0 961.0,29.6 1469.2,85.7 1509.2,34.6 1612.0,234.6 1612.0,248.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764rm:g038301900:03830_1900-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[617.0,1148.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9969362,42.4079814]}},{"type":"Feature","properties":{"resourceCoords":[446.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.9962279,42.409827]}}]}}]}