{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn07660_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Erie, Pennsylvania | 1950 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"114"},{"label":"placed","value":"92"},{"label":"unplaced","value":"22"},{"label":"fit sources","value":"georef 73, georef-snap 19"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 16 panels"},{"label":"unplaced pages","value":"p203 (tier 1, 42.12097,-80.11570 +/-250m); p227 (tier 1, 42.10807,-80.11804 +/-260m); p228 (tier 1, 42.10179,-80.11511 +/-257m); p234 (tier 1, 42.10216,-80.11247 +/-260m); p235 (tier 1, 42.10457,-80.11112 +/-123m); p236 (tier 2, 42.11009,-80.11060 +/-100m); p237 (tier 2, 42.11105,-80.10527 +/-100m); p239 (tier 2, 42.10635,-80.10733 +/-100m); p240 (tier 1, 42.10914,-80.10203 +/-256m); p279__2 (tier 1, 42.10853,-80.11833 +/-100m); p298__2 (tier 1, 42.10167,-80.08515 +/-100m); p401__1 (tier 2, 42.10999,-80.12677 +/-100m); p401__2 (tier 1, 42.11333,-80.12379 +/-157m); p401__3 (tier 2, 42.10999,-80.12677 +/-100m); p401__4 (tier 1, 42.11395,-80.12283 +/-117m); p401__5 (tier 1, 42.10527,-80.13091 +/-116m); p403__2 (tier 1, 42.11802,-80.13197 +/-177m); p405__1 (tier 4, 42.11133,-80.10307 +/-5888m); p405__2 (tier 4, 42.11133,-80.10307 +/-5888m); p405__3 (tier 4, 42.11133,-80.10307 +/-5888m); p405__4 (tier 4, 42.11133,-80.10307 +/-5888m); p405__5 (tier 4, 42.11133,-80.10307 +/-5888m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0201/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p201","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.47"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0201/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0201","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"55.3,1794.7 63.2,1778.3 67.8,1533.7 24.2,1274.2 45.0,1118.3 82.0,1059.8 52.4,998.5 57.3,796.6 95.3,657.7 99.3,187.3 141.1,84.2 402.3,37.2 809.4,40.1 835.5,65.0 1069.6,65.0 1254.7,104.2 1365.4,60.4 1612.1,97.3 1550.2,965.0 1550.2,965.1 1545.8,1130.1 1554.2,1132.2 1548.6,1243.6 1539.8,1385.7 1542.8,1457.3 1548.2,1457.2 1537.0,1661.9 1543.1,1662.8 1538.0,1836.0 1224.0,1836.0 1223.8,1863.6 676.5,1870.1 679.9,1863.6 713.4,1842.0 189.8,1870.1 129.8,1917.6 55.3,1794.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0201/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1224.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1062017,42.1265871]}},{"type":"Feature","properties":{"resourceCoords":[1538.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1048597,42.1270728]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0202/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p202","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0202/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0202","type":"ImageService3","width":1667,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"602.5,1835.3 454.0,1837.0 171.7,1836.8 136.6,1838.5 142.8,1667.9 136.8,1667.0 149.2,1465.4 143.9,1465.5 141.5,1394.8 157.4,1145.2 149.2,1143.2 154.6,980.6 221.5,126.2 263.6,132.8 308.9,83.8 366.3,112.3 868.4,134.5 1552.2,95.5 1592.4,641.3 1592.8,826.6 1557.8,948.0 1617.0,1065.8 1600.8,1276.5 1635.3,1613.4 1622.4,1842.5 1581.7,1930.1 1565.2,1930.3 1555.0,1930.5 1555.6,1884.7 1004.2,1844.8 1004.3,1836.3 602.5,1835.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0202/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[454.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1034904,42.127583]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0987256,42.129338]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p204","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.82"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0204","type":"ImageService3","width":1667,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1410.1,1869.8 1405.2,1655.0 1403.3,1230.1 1386.9,660.7 1398.8,574.5 1431.0,507.8 1383.4,479.7 1501.0,26.9 1435.0,26.8 1424.1,36.5 1095.9,14.9 1059.2,86.5 345.7,47.0 306.8,1.0 288.1,1.0 227.3,1040.7 204.9,1066.1 315.9,1883.4 347.1,1884.1 872.0,1879.5 1375.5,1868.5 1410.1,1869.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0204/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11683309018903,42.11915915172518]}},{"type":"Feature","properties":{"resourceCoords":[1667.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11319031196224,42.12044319304688]}},{"type":"Feature","properties":{"resourceCoords":[1667.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11116843773245,42.11728084203481]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11481121595924,42.115996800713106]}},{"type":"Feature","properties":{"resourceCoords":[299.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1142263,42.1163342]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p205","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0205/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0205","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1427.3,1879.3 1426.8,1914.3 435.2,1924.5 424.2,1934.4 90.1,1916.2 168.6,1757.4 154.5,722.6 71.7,609.4 153.9,613.6 152.2,286.7 244.0,86.3 509.6,149.6 599.5,82.0 722.2,163.3 852.6,80.9 1015.8,147.3 1091.7,73.5 1431.8,81.8 1426.5,1147.6 1338.0,1219.5 1440.4,1355.6 1493.3,1491.4 1507.4,1878.4 1427.3,1879.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0205/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11651403024106,42.12300423418106]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11287440522605,42.124249905925865]}},{"type":"Feature","properties":{"resourceCoords":[1685.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11094543136028,42.12110536118044]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11458505637529,42.119859689435636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p206","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0206/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0206","type":"ImageService3","width":1663,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1342.1,79.3 1344.0,45.0 1422.3,46.6 1422.6,79.8 1419.7,508.4 1406.2,560.0 1415.5,725.1 1407.9,1301.1 1407.0,1809.2 1401.3,1837.8 1369.1,1857.4 1365.5,1889.1 1080.5,1887.9 852.0,1891.0 345.8,1888.1 305.9,1890.7 305.9,1676.9 313.6,1254.0 310.1,686.9 323.9,601.3 357.4,535.7 310.7,506.7 437.9,58.6 1342.1,79.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0206/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[852.0,1298.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1112723,42.1186091]}},{"type":"Feature","properties":{"resourceCoords":[852.0,1891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.110625,42.1176532]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0207/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p207","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.24"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0207/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0207","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"314.1,994.4 219.6,1047.9 293.1,1191.7 320.4,1327.4 270.4,1692.7 266.4,1724.6 256.7,1793.8 1295.1,1874.0 1295.9,1868.4 1300.1,1837.9 1387.0,1266.0 1371.5,1263.8 1482.2,326.2 1523.7,302.3 1572.6,274.0 1466.7,23.0 1428.8,78.4 1275.9,96.8 822.3,41.5 614.9,75.4 518.6,1.0 491.8,1.0 314.1,994.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0207/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[311.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1119188,42.1217865]}},{"type":"Feature","properties":{"resourceCoords":[1387.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1096888,42.122916]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0208/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p208","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0208/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0208","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"298.8,1268.3 282.6,1268.2 268.2,286.0 307.7,255.6 473.7,127.5 1506.7,85.7 1440.1,127.2 1426.2,152.9 1410.8,192.3 1403.4,640.9 1399.7,715.9 1400.0,1276.0 1399.9,1310.0 1396.4,1838.0 1394.5,1876.4 1234.5,1874.5 734.6,1874.3 287.6,1870.0 298.8,1268.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0208/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1400.0,678.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.107958,42.1247459]}},{"type":"Feature","properties":{"resourceCoords":[1400.0,1276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1073086,42.1237906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p209","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0209/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0209","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"308.0,1831.4 306.2,1305.4 306.0,1271.6 300.1,713.8 303.0,639.0 305.9,192.2 320.8,152.8 327.7,139.8 1402.5,130.2 1399.6,375.2 1403.0,1860.0 306.5,1869.7 308.0,1831.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0209/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[300.0,676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.107958,42.1247459]}},{"type":"Feature","properties":{"resourceCoords":[1403.0,1860.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1042957,42.1237116]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0210/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p210","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0210/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0210","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"212.9,367.2 219.1,68.0 836.0,75.3 906.0,72.5 1469.1,75.5 1467.1,111.7 1461.6,1228.3 1459.0,1300.3 1455.0,1863.2 912.4,1866.4 693.4,1865.6 203.2,1852.9 212.9,367.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0210/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[204.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.10493190845104,42.12465355959832]}},{"type":"Feature","properties":{"resourceCoords":[828.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.10293569945404,42.12420242648956]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0211/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p211","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0211/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0211","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"303.2,1307.5 305.4,1235.1 304.7,113.9 306.5,77.6 604.0,74.0 1408.7,75.4 1408.4,118.5 1408.6,636.4 1403.6,922.7 1405.6,1872.3 1105.9,1873.8 302.3,1872.7 303.2,1307.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0211/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[305.0,675.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.102854,42.1266249]}},{"type":"Feature","properties":{"resourceCoords":[305.0,1274.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1022126,42.1256655]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0212/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p212","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0212/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0212","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.3,99.9 1405.9,180.8 1404.7,272.1 1457.7,271.3 1412.0,369.1 1414.0,1812.8 1481.2,1870.3 301.0,1870.7 300.9,925.9 306.4,641.0 307.1,125.8 307.3,99.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0212/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1399.0,680.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0981006,42.128376]}},{"type":"Feature","properties":{"resourceCoords":[1399.0,1870.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.096815,42.1264622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0213/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p213","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0213/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0213","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"261.0,1898.0 230.5,1898.1 233.9,1866.4 266.0,1846.7 271.4,1818.1 269.7,1310.7 274.2,735.5 264.1,570.5 277.2,519.0 277.8,162.9 1349.1,96.7 1349.9,348.7 1354.9,745.5 1352.7,958.9 1350.3,1861.5 1349.0,1897.0 261.0,1898.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0213/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1349.0,1897.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1070719,42.1189711]}},{"type":"Feature","properties":{"resourceCoords":[1349.0,59.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1090596,42.1219457]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p214","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0214/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0214","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"305.0,1895.0 306.3,1859.5 309.1,956.7 311.4,743.4 306.6,346.4 305.9,88.5 305.9,56.7 748.7,58.1 1244.0,55.2 1402.5,56.1 1399.9,349.9 1401.9,603.3 1398.5,1338.8 1397.5,1895.5 305.0,1895.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0214/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1401.0,673.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.106004,42.1218278]}},{"type":"Feature","properties":{"resourceCoords":[305.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1070719,42.1189711]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0215/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p215","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0215/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0215","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.8,1906.7 311.0,1345.6 312.1,604.4 309.3,349.0 311.0,53.0 1410.0,43.8 1407.8,352.7 1408.5,739.7 1415.0,994.0 1411.5,1901.5 311.8,1906.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0215/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[311.0,1310.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.105327,42.120806]}},{"type":"Feature","properties":{"resourceCoords":[311.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1066683,42.122827]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0216/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p216","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0216/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0216","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"681.4,61.0 900.5,59.0 1443.3,49.2 1447.2,345.7 1442.3,412.3 1444.7,1006.6 1450.0,1300.5 1453.0,1902.0 1415.9,1904.7 1061.9,1908.5 760.2,1906.9 199.6,1909.6 199.5,1003.2 191.9,749.3 189.7,362.8 190.8,54.2 681.4,61.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0216/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[825.0,1307.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1015888,42.1221896]}},{"type":"Feature","properties":{"resourceCoords":[1453.0,1902.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0995925,42.1217236]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0217/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p217","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0217/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0217","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1357.9,1893.7 291.7,1905.4 289.7,1299.2 284.8,1003.0 283.3,404.0 288.4,336.9 285.0,38.0 1091.9,35.0 1392.9,31.9 1392.2,667.2 1396.9,727.4 1398.6,1259.8 1401.4,1603.5 1401.0,1895.0 1357.9,1893.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0217/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1401.0,1895.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0972119,42.1226084]}},{"type":"Feature","properties":{"resourceCoords":[285.0,38.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1015773,42.1247045]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0218/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p218","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0218/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0218","type":"ImageService3","width":1671,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"305.2,1617.7 304.6,1274.2 306.2,742.2 302.0,682.0 306.7,47.2 1497.0,45.9 1571.6,109.5 1494.3,400.9 1573.0,786.8 1480.4,1789.3 1515.5,1914.5 1327.3,1915.4 613.4,1913.2 303.0,1909.0 305.2,1617.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0218/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[302.0,682.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0985263,42.1245649]}},{"type":"Feature","properties":{"resourceCoords":[303.0,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0972119,42.1226084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0219/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p219","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0219/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0219","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"262.6,1723.3 274.0,639.0 272.4,137.8 274.0,49.0 321.4,51.0 838.3,57.1 1334.2,56.5 1368.2,58.4 1360.4,224.1 1385.0,284.6 1381.3,426.2 1361.8,466.5 1359.6,637.9 1350.8,834.6 1373.8,881.5 1379.8,1021.9 1355.9,1056.3 1357.9,1446.1 1382.8,1507.4 1388.2,1579.7 1380.3,1655.2 1355.6,1697.1 1354.5,1878.5 933.3,1877.6 894.1,1879.5 263.6,1871.5 262.6,1723.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0219/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[274.0,639.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1135775,42.1153727]}},{"type":"Feature","properties":{"resourceCoords":[274.0,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1142263,42.1163342]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0220/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p220","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0220/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0220","type":"ImageService3","width":1671,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.9,1892.3 309.9,1710.0 334.9,1667.9 343.3,1592.1 338.2,1519.4 313.6,1457.7 313.6,1065.7 337.9,1031.2 332.5,890.1 309.7,842.8 319.5,645.0 322.6,472.8 342.4,432.4 346.9,290.1 322.5,229.0 331.3,62.5 370.9,60.0 874.7,64.9 1102.1,62.6 1385.8,64.9 1416.2,65.1 1408.5,393.2 1401.1,1301.8 1391.0,1897.3 1390.7,1923.0 311.1,1926.5 307.9,1892.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0220/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1401.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1081406,42.1161283]}},{"type":"Feature","properties":{"resourceCoords":[1401.0,65.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1094779,42.1180844]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0221/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p221","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0221/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0221","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1365.0,49.0 1367.7,87.5 1366.0,642.4 1361.1,1292.7 1360.8,1890.0 263.0,1891.0 268.7,1292.1 269.2,378.2 274.5,48.2 1365.0,49.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0221/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1365.0,49.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1070719,42.1189711]}},{"type":"Feature","properties":{"resourceCoords":[263.0,1891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1074747,42.1151141]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0222/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p222","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0222/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0222","type":"ImageService3","width":1671,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"319.6,1296.0 320.0,646.0 317.9,91.5 315.0,53.0 1409.2,47.4 1412.0,1234.4 1414.6,1887.8 323.4,1893.0 319.6,1296.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0222/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[320.0,646.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1064275,42.1180145]}},{"type":"Feature","properties":{"resourceCoords":[320.0,1271.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1057598,42.1170021]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0223/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p223","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0223/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0223","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1348.9,53.4 1350.3,1221.0 1349.8,1865.5 273.1,1869.7 272.4,1226.5 273.0,58.0 1348.9,53.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0223/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[273.0,648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1040444,42.1188777]}},{"type":"Feature","properties":{"resourceCoords":[273.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1046885,42.1198472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0224/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p224","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0224/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0224","type":"ImageService3","width":1671,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"764.5,26.6 1068.4,28.6 1425.0,25.4 1462.3,22.7 1465.0,582.8 1465.7,1278.8 1454.0,1882.1 1414.9,1882.4 206.0,1892.0 204.7,1229.2 199.8,28.4 764.5,26.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0224/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1463.0,327.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.09927,42.1212372]}},{"type":"Feature","properties":{"resourceCoords":[206.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1003298,42.117749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0225/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p225","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0225/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0225","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"254.9,1928.5 273.3,1316.2 280.2,609.6 283.7,41.1 1365.6,40.7 1409.3,42.5 1402.0,421.4 1403.9,950.1 1395.9,1269.9 1392.7,1935.3 1163.5,1936.0 806.0,1928.0 424.0,1930.0 271.7,1928.5 254.9,1928.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0225/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[281.0,648.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0989534,42.12077]}},{"type":"Feature","properties":{"resourceCoords":[281.0,350.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.09927,42.1212372]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0226/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p226","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0226/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0226","type":"ImageService3","width":1662,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"291.9,1235.5 296.1,923.5 288.2,407.7 291.0,38.0 598.5,39.9 1305.7,36.9 1492.1,34.6 1515.3,114.9 1531.2,731.9 1469.0,893.5 1511.8,1865.9 1506.8,1877.6 296.4,1884.7 291.9,1235.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0226/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[291.0,634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.096578,42.1216451]}},{"type":"Feature","properties":{"resourceCoords":[291.0,38.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0972119,42.1226084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0229/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p229","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0229/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0229","type":"ImageService3","width":1679,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"451.4,1869.3 450.6,1910.1 1007.9,1913.3 1018.6,1910.5 1312.4,1915.1 1338.4,1948.0 1360.3,1915.8 1477.3,1918.0 1559.2,1878.7 1678.0,1881.0 1678.0,317.7 1384.5,1.0 1383.9,1.0 1379.8,37.0 1378.0,55.5 237.6,32.1 187.9,980.9 452.4,1020.5 377.7,1026.5 261.6,1036.1 263.4,1480.7 335.4,1484.0 333.0,1670.5 293.2,1804.8 285.6,1861.5 451.4,1869.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0229/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.1214245785418,42.112635001152974]}},{"type":"Feature","properties":{"resourceCoords":[1679.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11771552119694,42.11406766072677]}},{"type":"Feature","properties":{"resourceCoords":[1679.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.1154894468324,42.11085111913215]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11919850417726,42.109418459558356]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0232/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p232","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.67"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0232/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0232","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.9,43.2 17.2,43.3 25.9,115.5 26.9,1913.3 1570.0,1912.8 1644.0,1675.4 1613.3,1300.8 1648.0,1208.2 1648.0,1131.0 1654.0,1109.0 1650.0,1109.0 1649.0,1091.0 1650.0,1071.0 1654.2,1071.2 1654.4,1047.3 1651.0,1047.0 1651.0,1026.0 1595.0,1028.0 1594.0,974.0 1652.0,972.0 1652.0,911.0 1655.2,910.6 1655.5,865.7 1650.0,865.0 1650.0,808.0 1652.7,807.9 1652.6,805.1 1650.0,805.0 1650.0,759.0 1650.4,759.0 1650.0,751.0 1649.0,725.0 1656.3,724.3 1656.4,702.7 1649.0,702.0 1648.0,677.0 1656.6,675.8 1656.7,654.6 1647.0,655.0 1647.0,623.0 1655.0,622.0 1655.0,582.0 1645.0,581.0 1645.0,564.0 1657.2,563.0 1655.0,550.0 1654.0,542.0 1645.0,541.0 1645.0,513.0 1657.6,510.1 1657.7,486.5 1645.0,485.0 1645.0,460.0 1651.0,459.0 1653.0,452.0 1657.9,452.0 1658.0,439.3 1644.0,437.0 1644.0,12.0 1493.0,10.0 1492.1,1.0 1487.9,1.0 1487.0,10.0 1467.0,10.0 1466.1,1.0 1458.9,1.0 1458.0,11.0 1425.0,11.0 1424.1,1.0 224.8,1.0 140.9,43.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0232/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.1163127621595,42.110688664607785]}},{"type":"Feature","properties":{"resourceCoords":[1672.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11278539875599,42.11198857078141]}},{"type":"Feature","properties":{"resourceCoords":[1672.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.1107572165848,42.10891667567258]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1949.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.11428457998831,42.107616769498954]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0233/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p233","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0233/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0233","type":"ImageService3","width":1679,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5.0,1760.6 1.0,1836.9 1.0,1853.5 18.1,1807.0 83.2,1880.8 359.5,1763.0 770.0,1870.7 1508.2,1910.7 1622.8,1865.6 1661.0,941.4 1566.6,634.3 1630.1,555.9 1646.0,109.0 1678.0,108.4 1674.2,73.7 1243.6,77.2 1203.6,79.5 559.0,78.0 277.6,81.9 1.0,200.4 1.0,588.1 9.0,589.0 9.0,606.0 1.0,606.9 1.0,621.1 9.0,622.0 9.0,638.0 1.0,638.9 1.0,646.1 10.0,647.0 10.0,664.0 1.0,664.9 1.0,683.6 23.8,710.9 9.7,711.0 9.5,741.0 10.0,741.0 12.0,768.0 9.4,768.2 9.3,791.8 12.0,792.0 12.0,814.0 9.2,814.2 9.1,823.8 11.0,824.0 11.0,840.0 9.0,840.2 8.9,867.0 24.0,867.0 25.0,919.0 8.7,917.4 7.7,1113.8 1.0,1120.7 1.0,1121.2 7.5,1147.8 7.5,1171.0 4.0,1202.4 7.2,1223.2 1.0,1223.7 1.0,1227.3 5.0,1241.8 5.1,1281.2 6.8,1313.2 6.8,1334.1 6.6,1360.6 6.5,1381.9 1.0,1405.7 1.0,1420.0 6.0,1521.1 5.0,1760.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0233/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[559.0,707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1115824,42.1123479]}},{"type":"Feature","properties":{"resourceCoords":[559.0,78.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.112245,42.1133558]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0238/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p238","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0238/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0238","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"547.2,717.6 1.0,936.4 1.0,1948.0 1181.2,1948.0 1280.8,1906.8 1560.1,1906.3 1559.3,1756.0 1572.9,655.7 1572.2,147.1 1574.0,57.0 1368.1,53.2 1286.1,53.3 1204.3,53.4 1192.2,53.0 638.0,503.5 583.4,625.0 552.7,703.4 551.2,707.4 547.2,717.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0238/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1023.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.113407,42.112923]}},{"type":"Feature","properties":{"resourceCoords":[1574.0,57.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1142263,42.1163342]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0241/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p241","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0241/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0241","type":"ImageService3","width":1670,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"74.2,1822.6 129.5,1539.8 229.6,1589.2 282.3,1499.0 320.6,1219.3 270.6,614.1 183.8,554.7 259.9,501.1 270.9,175.0 270.9,149.3 1362.0,144.0 1363.8,764.6 1360.6,848.6 1365.5,1352.7 1366.5,1655.7 1363.7,1698.8 1362.9,1709.7 1362.2,1720.3 1362.2,1722.7 74.2,1822.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0241/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[273.0,768.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1068015,42.1141095]}},{"type":"Feature","properties":{"resourceCoords":[1362.0,144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.105088,42.1159973]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0242/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p242","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0242/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0242","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1367.0,140.0 1366.9,1582.0 1366.8,1583.1 266.6,1729.0 267.6,1715.1 270.4,1671.4 269.9,1364.5 265.6,854.0 269.0,769.0 268.0,140.5 1367.0,140.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0242/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[269.0,769.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1044134,42.1149894]}},{"type":"Feature","properties":{"resourceCoords":[1367.0,140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1027106,42.1168703]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0243/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p243","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0243/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0243","type":"ImageService3","width":1670,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"318.1,1903.0 253.6,1913.8 158.2,1860.3 137.2,1567.7 205.8,1178.2 155.6,1078.5 248.8,1108.2 331.3,891.7 191.1,755.7 224.2,689.1 100.2,453.3 116.2,373.0 1404.5,276.2 1404.4,334.1 1403.5,923.0 1402.3,1607.8 1402.1,1752.7 1401.9,1877.1 318.1,1903.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0243/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[325.0,1196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.104747,42.111066]}},{"type":"Feature","properties":{"resourceCoords":[1403.0,1196.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1023862,42.1119344]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0244/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p244","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0244/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0244","type":"ImageService3","width":1675,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1390.6,145.7 1390.6,1395.5 1391.0,1892.0 1391.0,1904.5 298.9,1894.1 298.9,1751.2 299.2,265.8 299.7,257.9 1390.9,113.0 1390.6,141.2 1390.6,145.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0244/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[299.0,1192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1023862,42.1119344]}},{"type":"Feature","properties":{"resourceCoords":[1391.0,1892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0992491,42.1116747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0245/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p245","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0245/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0245","type":"ImageService3","width":1670,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"256.3,147.2 1350.7,146.4 1348.0,770.0 1340.5,770.0 1330.9,1611.0 253.0,1712.1 253.2,1613.4 253.2,1595.4 253.6,1579.6 256.3,147.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0245/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[255.0,770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1020402,42.1158638]}},{"type":"Feature","properties":{"resourceCoords":[1348.0,770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0996616,42.1167402]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0246/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p246","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0246/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0246","type":"ImageService3","width":1675,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1522.1,1740.4 862.5,1630.2 862.2,1564.8 217.9,1626.0 226.6,777.9 234.1,777.9 236.0,149.0 1441.0,145.1 1496.4,144.9 1495.0,777.0 1503.5,777.0 1522.1,1740.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0246/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1495.0,777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0969399,42.1177415]}},{"type":"Feature","properties":{"resourceCoords":[236.0,149.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1003298,42.117749]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0247/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p247","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0247/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0247","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"301.5,244.0 1435.4,129.6 1419.0,606.0 1408.0,606.0 1409.3,889.4 1392.0,1391.7 1411.5,1391.5 1413.5,1897.2 310.0,1903.0 301.5,244.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0247/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1408.0,606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0982389,42.1146281]}},{"type":"Feature","properties":{"resourceCoords":[310.0,1903.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0992491,42.1116747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0248/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p248","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0248/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0248","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"840.6,1889.0 218.0,1889.0 218.1,1384.5 198.7,1384.7 218.0,883.7 217.9,601.0 228.9,601.0 247.2,125.9 836.8,68.9 837.2,133.9 1493.3,242.5 1493.5,254.5 1464.6,253.7 1473.6,875.0 1461.6,875.0 1462.8,1883.5 840.6,1889.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0248/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[838.0,600.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0968923,42.1151227]}},{"type":"Feature","properties":{"resourceCoords":[218.0,1889.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0968582,42.1125518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0249/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p249","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0249/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0249","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1392.4,1778.7 317.6,1743.0 300.6,762.0 292.0,762.0 294.6,126.4 445.0,127.2 822.1,123.7 1175.1,130.2 1401.5,128.5 1392.5,1762.7 1392.4,1778.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0249/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[292.0,762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0969399,42.1177415]}},{"type":"Feature","properties":{"resourceCoords":[1398.0,762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0945672,42.1186171]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0250/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p250","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0250/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0250","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1490.0,121.5 1428.9,260.6 1489.5,340.5 1412.0,919.0 1556.5,1082.0 1427.9,1443.6 1512.4,1792.2 279.7,1737.4 279.7,1731.8 284.0,122.8 1490.0,121.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0250/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1385.0,765.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0921413672334,42.1194688148741]}},{"type":"Feature","properties":{"resourceCoords":[1385.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.09281937149031,42.12048684662184]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0251/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p251","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0251/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0251","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"302.0,1706.0 302.0,693.9 314.1,693.8 305.8,70.3 1401.4,104.2 1401.3,127.6 1403.3,1700.3 302.0,1706.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0251/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[302.0,409.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0955473,42.1156325]}},{"type":"Feature","properties":{"resourceCoords":[302.0,1706.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0941589,42.1135502]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0252/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p252","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0252/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0252","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"310.9,1699.9 308.0,152.7 308.1,119.7 1530.4,173.9 1558.2,288.3 1420.9,683.3 1410.0,1157.2 1417.5,1342.7 1530.4,1398.5 1557.7,1560.7 1534.3,1699.3 310.9,1699.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0252/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[310.0,1215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0923103,42.1152247]}},{"type":"Feature","properties":{"resourceCoords":[1395.0,1215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0899226,42.1160995]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0253/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p253","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0253/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0253","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"328.9,1589.7 92.2,1315.5 108.3,1283.0 260.0,1349.8 310.1,1248.6 331.0,461.2 236.5,397.6 303.2,229.2 268.3,209.6 333.6,198.7 1429.7,172.4 1429.7,192.2 1427.4,1201.3 1425.2,1462.5 1427.0,1707.0 326.6,1702.2 328.9,1589.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0253/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[333.0,697.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1034606,42.1091109]}},{"type":"Feature","properties":{"resourceCoords":[1427.0,1707.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1000075,42.1083596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0254/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p254","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0254/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0254","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"318.1,1461.3 320.2,1201.9 322.1,199.8 322.1,198.1 1414.0,209.5 1413.3,446.0 1412.9,943.1 1407.0,1198.9 1412.7,1698.5 320.0,1704.0 318.1,1461.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0254/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[320.0,1704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1000075,42.1083596]}},{"type":"Feature","properties":{"resourceCoords":[1414.0,197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0992491,42.1116747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0255/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p255","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0255/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0255","type":"ImageService3","width":1680,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"304.1,1210.0 312.0,951.2 316.1,448.4 318.6,196.5 1427.2,205.2 1422.0,966.0 1418.0,1215.0 1416.2,1720.4 1159.9,1720.5 306.1,1715.5 304.1,1210.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0255/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[314.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0987027,42.1108526]}},{"type":"Feature","properties":{"resourceCoords":[1418.0,1215.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.095784,42.1109352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0256/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p256","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0256/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0256","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"864.5,197.7 1484.0,193.0 1484.1,1745.0 1265.5,1754.8 1197.1,1769.8 859.6,1921.2 860.4,1702.4 245.0,1695.0 243.0,1195.2 245.0,949.0 244.4,196.8 864.5,197.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0256/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1484.0,696.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0936162,42.1127364]}},{"type":"Feature","properties":{"resourceCoords":[245.0,1695.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0952403,42.1101283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0257/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p257","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0257/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0257","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1390.1,1720.5 1354.2,1721.3 283.8,1769.3 279.3,199.0 1385.0,190.4 1389.0,1204.9 1397.9,1204.9 1402.7,1481.2 1389.6,1481.2 1390.1,1720.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0257/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[282.0,1210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0930809,42.1119335]}},{"type":"Feature","properties":{"resourceCoords":[1387.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0912335,42.1136147]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0258/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p258","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0258/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0258","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.6,1192.2 277.7,1192.2 278.3,189.3 1512.7,191.7 1418.0,744.2 1563.1,1308.8 1507.3,1756.9 982.7,1821.7 601.5,1765.8 564.8,1822.8 430.9,1756.2 295.7,1904.5 286.6,1192.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0258/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[278.0,696.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0912335,42.1136147]}},{"type":"Feature","properties":{"resourceCoords":[1370.0,696.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0888545,42.1144917]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0259/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p259","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0259/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0259","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"271.0,1747.0 271.9,745.5 276.4,473.1 275.1,221.6 1382.5,226.8 1382.5,691.9 1380.0,1747.0 271.0,1747.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0259/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[271.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1007759,42.1050531]}},{"type":"Feature","properties":{"resourceCoords":[1380.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0983902,42.1059314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0260/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p260","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0260/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0260","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"294.9,1738.7 299.9,688.0 301.0,225.0 1403.6,223.0 1396.9,1741.3 294.9,1738.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0260/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1399.0,1236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.096549,42.1076185]}},{"type":"Feature","properties":{"resourceCoords":[301.0,225.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1000075,42.1083596]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0261/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p261","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0261/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0261","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"289.5,222.4 1142.5,218.8 1398.5,216.1 1397.1,459.6 1399.0,1739.0 292.0,1743.0 289.5,222.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0261/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[291.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.096549,42.1076185]}},{"type":"Feature","properties":{"resourceCoords":[1399.0,1739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0936211,42.107687]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0262/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p262","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0262/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0262","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"856.6,231.5 856.1,452.6 1197.0,299.2 1266.0,284.0 1487.0,273.9 1488.0,1745.0 233.0,1747.8 233.0,468.2 234.7,224.7 856.6,231.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0262/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[233.0,1241.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0941612,42.1084989]}},{"type":"Feature","properties":{"resourceCoords":[1488.0,1745.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0909143,42.1086835]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0263/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p263","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0263/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0263","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"267.1,282.8 262.5,1759.5 1370.2,1761.3 1409.8,1682.0 1477.6,1698.8 1389.3,1587.0 1429.3,1166.6 1384.2,458.1 1395.8,445.4 1390.5,1.0 1377.4,1.0 1376.6,239.9 1340.7,240.5 267.1,282.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0263/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,1250.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0914561,42.1094963]}},{"type":"Feature","properties":{"resourceCoords":[1375.0,742.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0896141,42.1111869]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0264/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p264","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0264/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0264","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1444.6,223.0 1430.2,251.9 1430.8,503.4 1575.8,902.1 1502.8,1234.2 1513.8,1666.7 1677.0,1755.9 1677.0,1766.3 1677.0,1775.4 1181.0,1775.2 1148.3,1775.2 676.3,1775.3 345.7,1775.5 349.0,222.0 1444.6,223.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0264/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1444.0,1027.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0876672,42.1082639]}},{"type":"Feature","properties":{"resourceCoords":[349.0,222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0909143,42.1086835]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0265/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p265","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0265/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0265","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.9,1758.5 285.3,726.1 310.2,706.6 285.2,706.8 285.0,200.1 1383.0,198.0 1383.0,1755.0 286.9,1758.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0265/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1383.0,198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0983902,42.1059314]}},{"type":"Feature","properties":{"resourceCoords":[1383.0,1755.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.096718,42.1034191]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0266/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p266","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0266/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0266","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"635.8,1762.3 296.8,1766.6 295.0,201.0 1396.8,197.7 1399.0,1762.0 635.8,1762.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0266/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[295.0,201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0983902,42.1059314]}},{"type":"Feature","properties":{"resourceCoords":[1399.0,1762.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0943376,42.1042979]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0267/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p267","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0267/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0267","type":"ImageService3","width":1673,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"313.0,1761.1 311.5,207.5 1409.0,204.6 1410.0,1757.0 313.0,1761.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0267/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[312.0,709.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0954696,42.1059977]}},{"type":"Feature","properties":{"resourceCoords":[1410.0,1757.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0919521,42.1051785]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0268/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p268","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0268/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0268","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"461.8,1747.5 225.1,1747.9 227.8,190.5 1475.9,190.1 1474.5,1746.1 468.4,1747.5 461.8,1747.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0268/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[227.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0930825,42.1068777]}},{"type":"Feature","properties":{"resourceCoords":[851.0,1747.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0905954,42.1056794]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0269/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p269","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0269/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0269","type":"ImageService3","width":1673,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.2,1248.5 125.7,738.5 122.6,230.2 1226.2,229.2 1463.5,229.0 1468.0,229.0 1477.4,740.1 1462.2,740.1 1450.4,1250.4 1467.5,1250.4 1386.5,1741.2 1222.6,1741.4 119.0,1743.0 120.2,1248.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0269/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1225.0,739.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0914075,42.1043597]}},{"type":"Feature","properties":{"resourceCoords":[119.0,1743.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0927212,42.1018679]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0270/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p270","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0270/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0270","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.2,1753.1 242.5,1264.6 225.6,1264.5 239.1,756.2 254.2,756.3 246.6,247.1 248.9,247.1 1253.9,249.8 1584.7,250.6 1563.3,1756.0 387.6,1753.5 160.2,1753.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0270/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[627.0,1254.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.08951247283348,42.10405891653748]}},{"type":"Feature","properties":{"resourceCoords":[627.0,247.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.09060544931738,42.1056779020246]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0271/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p271","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0271/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0271","type":"ImageService3","width":1673,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"543.0,199.0 575.8,198.6 1072.5,193.3 1072.3,173.8 1080.4,178.1 1484.1,223.1 1491.2,213.2 1561.3,1243.1 1559.0,1243.1 1561.3,1692.4 1435.3,1693.2 929.6,1699.0 849.4,1702.4 69.7,1711.6 70.2,204.3 543.0,199.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0271/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[543.0,199.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0875012,42.1068217]}},{"type":"Feature","properties":{"resourceCoords":[543.0,1706.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.085913,42.1043849]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0272/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p272","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0272/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0272","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"119.5,1710.8 120.0,1260.4 122.3,1260.5 58.5,227.8 104.7,163.2 1286.5,181.9 1541.7,89.3 1601.4,128.5 1605.0,1706.0 1054.2,1710.4 506.0,1710.8 119.5,1710.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0272/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1053.0,200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0832931,42.1083707]}},{"type":"Feature","properties":{"resourceCoords":[1605.0,1706.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0804923,42.1063846]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0273/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p273","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0273/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0273","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.3,1948.0 241.3,1027.9 239.0,531.0 241.1,22.3 1338.8,23.6 1329.3,1918.6 1221.3,1920.0 725.4,1856.4 350.1,1920.1 340.8,1948.0 234.3,1948.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0273/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[239.0,531.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0921738,42.1010468]}},{"type":"Feature","properties":{"resourceCoords":[1334.0,1034.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0892507,42.101118]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0274/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p274","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0274/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0274","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.5,34.4 457.1,32.6 1629.5,27.4 1619.3,1536.0 1635.5,1535.8 1534.5,1948.0 1528.0,1948.0 1517.9,1948.0 1476.2,1883.5 1212.1,1911.8 1081.2,1838.9 1001.2,1899.6 867.1,1850.2 743.6,1914.4 68.6,1927.0 67.5,34.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0274/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[675.0,539.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0884700958521,42.102417599043854]}},{"type":"Feature","properties":{"resourceCoords":[68.0,1528.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.08873099844513,42.10033411078915]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0275/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p275","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0275/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0275","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1671.0,1695.7 1671.0,1704.0 853.0,1719.5 853.0,1727.9 532.4,1729.1 94.7,1735.3 60.1,1736.1 62.9,217.8 844.5,210.6 925.0,207.3 1431.9,202.8 1579.7,202.2 1560.7,692.4 1572.4,692.4 1581.7,1181.1 1571.3,1181.1 1567.4,1662.0 1671.0,1671.6 1671.0,1695.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0275/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[850.0,702.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.08471785889716,42.10384281499259]}},{"type":"Feature","properties":{"resourceCoords":[60.0,1722.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.08535565620049,42.101580140197086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0276/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p276","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0276/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0276","type":"ImageService3","width":1678,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.5,1222.1 150.9,1222.1 144.6,733.4 132.9,733.4 154.8,243.4 519.9,244.3 1068.2,245.1 1619.0,242.0 1619.0,1716.0 1618.9,1848.8 133.6,1702.9 140.5,1222.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0276/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1619.0,242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0804923,42.1063846]}},{"type":"Feature","properties":{"resourceCoords":[1619.0,1716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0789152,42.1040165]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0277/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p277","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0277/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0277","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.7,800.6 118.1,513.1 146.5,523.2 252.2,346.3 430.8,457.1 454.2,443.8 563.4,260.2 464.9,206.4 817.7,170.6 1058.2,216.3 1106.7,228.1 1069.7,309.9 1293.4,422.5 1355.3,399.2 1412.0,427.8 1498.3,1353.6 1494.7,1380.2 1493.0,1899.6 1468.9,1900.4 1227.0,1901.1 997.3,1903.0 960.1,1900.1 897.7,1852.2 874.4,1827.5 821.0,1786.3 780.9,1769.5 732.9,1763.3 692.3,1769.6 635.3,1794.2 576.6,1845.6 526.0,1788.5 482.9,1821.1 418.9,1841.1 411.2,1844.8 404.1,1848.3 327.0,1909.2 323.8,1795.3 340.4,1785.3 266.2,1372.5 268.4,1372.5 283.9,1372.5 312.0,1372.6 319.4,1372.5 158.6,893.7 73.8,894.1 115.7,800.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0277/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1481.0,1367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.125004,42.1202103]}},{"type":"Feature","properties":{"resourceCoords":[1481.0,1900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1238383,42.118492]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0278/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p278","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0278/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0278","type":"ImageService3","width":1674,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"435.6,731.1 422.5,217.6 498.8,157.8 513.4,150.7 576.6,131.1 619.0,99.0 668.9,155.5 726.9,105.0 783.2,80.8 823.2,74.7 870.5,80.9 910.1,97.5 962.6,138.3 985.6,162.7 1047.1,210.1 1083.8,213.1 1310.3,211.7 1549.0,211.5 1546.7,321.9 1546.6,500.4 1544.6,619.7 1563.1,620.3 1561.2,667.9 1544.5,667.6 1545.5,995.6 1569.8,996.0 1568.8,1255.8 1545.6,1256.2 1545.0,1460.5 1556.3,1475.6 1557.4,1603.6 1540.2,1603.4 1534.0,1876.4 1394.8,1875.2 1397.0,1828.7 1289.8,1830.7 1289.9,1846.3 799.8,1869.2 807.3,1847.0 733.6,1831.8 636.3,1824.7 376.7,1824.4 379.8,1655.3 377.4,1625.3 365.8,1617.1 372.2,1584.7 375.8,1374.0 374.9,1357.2 375.4,1000.2 374.2,876.0 381.4,810.7 401.4,775.1 435.6,731.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0278/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,1374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1255701,42.1130733]}},{"type":"Feature","properties":{"resourceCoords":[579.0,1000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.126403,42.1142944]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0279__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p279 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.74"},{"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":"6688.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0279__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0279","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.9,341.2 95.1,364.9 121.0,423.8 103.2,528.7 166.2,580.6 157.9,606.0 301.6,613.3 433.0,661.4 435.8,661.4 435.8,662.4 437.2,662.9 478.2,922.9 435.9,1129.4 101.3,1133.8 93.2,1167.6 107.7,1704.9 181.8,1682.3 307.4,1743.9 387.4,1812.5 387.7,1854.8 740.9,1846.8 971.1,1892.3 1259.8,1861.2 1594.6,1873.8 1637.0,1065.6 1671.0,1065.0 1671.0,1048.6 1671.0,1043.8 1585.1,1041.8 1588.5,1012.2 1607.8,942.0 1607.2,845.1 1570.0,844.2 1564.7,613.3 1624.7,606.8 1663.3,602.7 1526.0,585.5 1544.0,44.2 1434.2,47.6 1434.5,63.7 932.5,93.6 939.9,70.8 864.2,56.1 764.3,50.1 498.2,53.2 500.8,153.3 500.9,277.4 503.7,309.1 474.2,303.5 473.6,275.9 473.6,240.5 46.9,341.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0279__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[501.0,597.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.12429406186355,42.109529738726366]}},{"type":"Feature","properties":{"resourceCoords":[1391.0,1317.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.11892383193145,42.10861947286333]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0280/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p280","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0280/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0280","type":"ImageService3","width":1674,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"77.8,1278.7 82.1,1251.5 13.8,299.7 27.4,306.9 109.3,111.5 820.5,145.6 1006.0,139.8 1239.5,59.5 1416.4,53.4 1456.8,83.6 1474.4,66.8 1492.7,89.6 1542.8,77.0 1573.1,388.4 1520.4,512.4 1594.0,733.7 1567.0,784.6 1641.6,1110.7 1612.9,1664.2 1567.7,1837.3 1463.5,1842.0 1463.6,1838.7 1157.6,1830.7 622.1,1822.8 591.1,1823.2 359.9,1817.5 64.8,1811.5 77.8,1278.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0280/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[622.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1226443,42.1210979]}},{"type":"Feature","properties":{"resourceCoords":[1171.0,1831.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1191098,42.1202748]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0281/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p281","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0281/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0281","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"57.1,1766.8 63.5,1485.6 81.2,1485.8 80.0,1353.9 68.4,1338.4 69.0,1128.0 92.9,1127.5 94.0,860.0 68.9,859.6 67.9,521.7 85.0,522.0 87.0,473.0 68.0,472.4 70.0,349.5 70.1,165.7 72.4,52.0 96.9,51.2 389.2,51.4 618.1,52.7 648.8,51.8 1178.9,49.4 1481.9,51.6 1481.9,54.8 1585.0,48.2 1576.2,84.7 1619.7,208.8 1619.8,536.6 1620.9,537.9 1576.0,1073.0 1564.3,1085.6 1609.8,1500.0 1601.3,1499.5 1497.2,1497.4 1414.4,1497.2 1408.3,1497.1 1127.6,1724.1 1099.8,1785.5 1083.5,1827.0 1081.5,1832.2 790.5,1948.0 664.4,1948.0 664.2,1906.4 509.8,1742.0 507.8,1761.1 506.8,1770.8 57.1,1766.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0281/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[904.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.12031221706438,42.119769766816624]}},{"type":"Feature","properties":{"resourceCoords":[1599.0,1490.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.11425672978213,42.11636083028396]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0286/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p286","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"32"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0286/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0286","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"270.4,1760.9 118.8,1753.7 89.9,1727.0 101.0,1644.4 43.4,1385.6 45.9,858.7 90.3,528.4 41.5,320.1 102.0,94.0 1189.7,98.9 1450.4,63.2 1480.9,86.5 1563.4,89.2 1587.7,176.6 1675.0,203.2 1675.0,229.9 1608.9,230.3 1603.9,841.9 1603.1,879.8 1586.3,906.6 1532.8,957.3 1488.2,1010.9 1467.2,1044.7 1436.8,1103.5 1409.0,1189.5 1377.8,1478.4 1354.5,1633.6 1336.6,1711.1 1338.2,1741.9 1062.5,1743.2 646.9,1746.5 527.9,1748.4 319.6,1749.0 343.4,1753.7 344.3,1773.6 319.4,1775.4 319.4,1786.8 270.4,1760.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0286/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[377.0,851.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1154638,42.0940227]}},{"type":"Feature","properties":{"resourceCoords":[1063.0,1531.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1110433,42.0929162]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0287/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p287","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0287/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0287","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.8,1551.9 126.9,1474.4 150.6,1319.0 182.7,1029.8 210.8,943.8 241.3,885.0 262.4,851.2 307.2,797.6 360.9,747.1 377.8,720.2 378.7,682.2 385.3,70.0 451.5,69.7 451.6,43.0 477.3,50.9 991.6,73.5 1094.2,35.9 1215.7,62.2 1355.5,26.1 1534.2,38.6 1580.2,65.3 1543.0,65.5 1553.5,565.5 1558.2,565.6 1549.8,819.5 1540.7,819.6 1578.0,1073.7 1573.6,1073.7 1579.1,1324.8 1582.2,1324.8 1573.3,1575.3 1578.5,1575.3 1630.8,1804.9 1619.7,1799.5 1579.5,1846.9 1358.9,1885.1 1149.7,1857.6 1033.6,1897.0 723.5,1912.1 702.9,1944.8 624.8,1826.5 624.8,1761.0 426.3,1582.3 110.3,1582.8 108.8,1551.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0287/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[537.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.11077742619545,42.09819372152629]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,1341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.10423395853739,42.095527784883394]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0288/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p288","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0288/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0288","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.0,1614.2 114.8,1089.0 87.7,1000.9 132.4,682.3 88.5,569.2 111.8,285.8 89.5,187.6 114.0,104.1 270.6,89.8 370.9,139.2 410.7,100.7 599.0,97.9 789.6,191.8 1129.7,209.8 1248.0,197.5 1324.0,93.7 1432.2,76.4 1447.4,45.7 1564.9,181.3 1563.9,237.0 1564.9,360.8 1563.0,494.9 1564.0,987.9 1564.4,1239.7 1564.4,1249.3 1565.7,1762.5 1311.5,1765.3 1057.7,1768.5 18.6,1773.1 93.0,1614.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0288/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[792.0,496.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1052155,42.105415]}},{"type":"Feature","properties":{"resourceCoords":[1565.0,1487.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0996953,42.1034337]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0289/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p289","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"34"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0289/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0289","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.7,1904.5 1209.8,1874.2 934.1,1859.9 592.8,1893.1 547.1,1874.6 518.4,1906.8 266.4,1853.5 169.1,1805.3 117.2,1574.9 112.0,1574.9 121.4,1323.7 118.2,1323.7 113.3,1071.8 117.7,1071.8 80.9,816.9 90.0,816.9 99.0,562.2 94.2,562.1 84.8,60.6 122.1,60.5 170.9,89.1 218.2,70.3 222.9,60.4 1276.9,58.5 1534.3,55.9 1536.0,309.3 1536.4,562.0 1538.9,1187.5 1540.4,1322.3 1537.9,1583.1 1529.9,1583.0 1452.8,1814.7 1671.0,1815.8 1671.0,1841.5 1285.6,1872.7 1285.6,1885.3 1270.7,1904.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0289/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1054.0,1001.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1002548,42.098341]}},{"type":"Feature","properties":{"resourceCoords":[532.0,565.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1034361,42.0989073]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0290/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p290","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"40"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0290/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0290","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"241.6,77.8 243.6,327.0 244.5,575.6 248.0,1191.0 249.7,1323.6 247.7,1580.1 239.9,1580.0 164.4,1808.1 379.1,1808.9 379.1,1834.2 1.0,1865.4 1.0,1876.5 8.6,1866.7 86.8,1868.0 190.1,1910.7 359.8,1919.8 663.9,1875.1 1329.3,1913.4 1558.8,1894.0 1606.8,1863.8 1636.6,1774.4 1583.8,1774.7 1585.1,1318.0 1582.8,1071.3 1582.6,818.8 1582.6,574.7 1584.8,322.8 1582.7,71.9 1206.2,71.6 1039.0,73.5 495.2,75.3 241.6,77.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0290/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1039.0,1073.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0945541,42.1001679]}},{"type":"Feature","properties":{"resourceCoords":[248.0,1191.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0977666,42.0985135]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0291/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p291","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0291/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0291","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"221.3,1781.2 221.9,1614.9 221.8,1541.6 220.6,808.6 219.2,24.1 240.0,37.8 447.7,48.1 847.8,32.2 1194.5,56.8 1315.0,41.0 1316.0,58.3 969.3,59.2 969.1,82.4 969.0,90.0 969.0,94.7 968.4,168.3 979.6,188.7 1097.3,282.1 1160.6,332.3 1383.9,637.8 1356.2,669.7 1324.8,705.7 1231.6,811.6 1268.4,831.6 1324.7,1628.0 1314.2,1640.3 1263.5,1696.3 1224.5,1727.0 1183.5,1750.4 1149.7,1764.3 1131.5,1771.8 1092.8,1787.8 913.6,1853.0 886.4,1864.5 878.5,1833.5 863.5,1804.3 702.7,1583.3 442.1,1581.8 221.3,1781.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0291/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[221.0,1050.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0799729,42.1056047]}},{"type":"Feature","properties":{"resourceCoords":[769.0,807.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0781056,42.1072622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0292/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p292","metadata":[{"label":"streets","value":"17"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0292/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0292","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"457.1,1639.3 400.2,848.4 363.7,828.5 456.2,723.2 514.8,655.7 292.6,352.5 112.7,210.1 101.5,189.8 102.1,116.7 102.2,104.5 102.3,81.5 446.7,80.2 445.6,62.9 578.5,45.3 1134.2,77.7 1356.9,54.4 1596.7,89.2 1629.0,183.7 1606.6,516.5 1635.8,634.3 1637.0,1420.8 1615.1,1420.4 1615.1,1598.3 1486.9,1599.7 1317.2,1599.7 1143.7,1602.1 926.4,1601.2 894.1,1599.0 881.7,1615.0 455.7,1641.0 457.1,1639.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0292/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1301.0,1096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0713887,42.1086097]}},{"type":"Feature","properties":{"resourceCoords":[1615.0,1096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0700102,42.1091114]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0293/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p293","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"28"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0293/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0293","type":"ImageService3","width":1672,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"15.0,219.0 15.0,236.0 25.0,237.0 24.8,241.1 61.6,260.5 44.5,1671.4 105.1,1860.6 378.8,1878.5 748.4,1845.7 1012.3,1892.6 1342.2,1819.7 1579.0,1870.4 1627.7,1725.3 1639.8,1192.2 1600.7,748.0 1609.7,562.9 1627.3,534.3 1547.5,416.0 1546.8,350.0 1345.1,172.1 1026.9,175.7 749.0,179.0 330.0,185.5 210.0,188.3 1.0,190.4 1.0,190.6 24.0,195.0 25.0,215.0 1.0,216.9 1.0,217.1 15.0,219.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0293/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[749.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1084663,42.0889492]}},{"type":"Feature","properties":{"resourceCoords":[749.0,179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1105943,42.0922327]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0298__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p298 [1]","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"26"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6704.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0298__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0298","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.8,1416.2 69.7,1605.1 735.0,1599.0 783.8,1588.3 889.1,1587.5 974.5,1583.5 1033.5,1573.5 1035.9,1600.4 1101.2,1576.1 1162.3,1540.1 1188.0,1519.0 1193.2,1582.3 1474.4,1616.5 1475.0,1611.4 1482.8,1577.5 1597.8,1276.7 1557.2,1273.3 1522.7,1272.9 1502.5,1276.0 1476.5,1279.0 1260.6,889.2 1466.5,702.0 1478.8,690.2 1385.7,586.8 1539.5,294.1 1572.4,264.1 1572.6,97.4 1572.6,90.1 883.4,24.9 883.4,41.1 475.6,47.9 475.6,52.1 315.8,52.3 97.6,54.9 88.5,55.0 36.1,271.3 56.7,303.1 76.2,433.9 46.1,837.0 60.9,1387.4 46.8,1416.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0298__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[479.0,1103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0813742,42.0988047]}},{"type":"Feature","properties":{"resourceCoords":[89.0,55.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0853033,42.1015718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p299","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299","type":"ImageService3","width":1669,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.8,1054.7 362.6,945.4 375.0,933.6 281.4,829.9 435.6,535.8 468.6,505.7 690.1,304.3 952.5,305.1 1115.0,527.1 1130.3,556.4 1138.2,587.5 1165.6,576.0 1345.8,509.8 1384.8,493.5 1392.5,490.3 1514.5,724.5 1483.8,748.6 1473.5,1260.5 1472.4,1408.8 1467.8,1794.1 1466.8,1820.8 1262.5,1816.1 1262.3,1851.8 1223.2,1858.6 1199.6,1862.8 1169.2,1865.8 379.5,1825.8 379.8,1824.5 495.0,1522.4 454.2,1519.0 445.1,1518.9 419.6,1518.7 403.0,1521.2 399.3,1521.8 373.2,1524.8 156.1,1133.7 242.8,1054.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[373.0,925.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0779298576154,42.10174197545316]}},{"type":"Feature","properties":{"resourceCoords":[1475.0,1271.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07241935167418,42.10236012306627]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299A/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p299A","metadata":[{"label":"streets","value":"22"},{"label":"intersections","value":"39"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299A/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299A","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1507.6,1858.5 1572.4,1852.4 1540.3,1778.9 1588.6,1605.7 1604.7,1350.5 1576.8,1241.4 1588.0,633.6 1521.7,393.9 1572.6,259.4 1570.3,158.2 1550.0,86.0 1468.0,39.0 1467.3,1.0 1445.2,1.0 1448.0,180.4 1317.9,183.9 1145.8,186.6 969.7,191.7 749.3,194.2 716.6,192.5 704.2,208.9 272.4,242.0 263.4,252.9 213.4,310.2 174.5,341.7 133.7,366.0 99.7,380.6 89.3,385.1 214.7,617.9 184.3,642.5 181.0,1155.0 181.9,1303.5 182.7,1689.2 182.0,1716.0 467.9,1711.8 866.9,1703.9 1201.2,1694.4 1247.0,1692.9 1506.5,1759.3 1507.6,1858.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0299A/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[181.0,1155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0724481,42.1023916]}},{"type":"Feature","properties":{"resourceCoords":[967.0,1035.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0692682,42.1039783]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0402/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p402","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0402/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0402","type":"ImageService3","width":1676,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"84.5,1844.0 59.8,1647.5 93.2,1613.7 112.7,1497.6 44.7,1363.5 36.4,1099.7 55.3,610.5 34.3,177.0 65.5,54.1 408.5,80.7 823.4,37.9 1428.5,34.4 1595.1,78.7 1656.0,712.0 1654.1,962.5 1591.9,1233.4 1629.7,1377.7 1624.5,1907.2 1232.5,1860.8 827.6,1883.3 509.9,1873.4 365.1,1827.2 84.5,1844.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0402/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1030.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.14282251584685,42.1008344959918]}},{"type":"Feature","properties":{"resourceCoords":[1420.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1411299744982,42.10145313967609]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0403__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p403 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2578.8"},{"label":"split_canvas_w","value":"6664.0"},{"label":"split_canvas_h","value":"5217.2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0403__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0403","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1302.3,644.7 1214.9,644.7 1186.8,706.5 677.4,671.9 86.5,703.9 67.7,927.5 118.1,1099.9 123.5,1309.9 164.4,1365.3 104.9,1507.7 151.2,1535.6 84.2,1839.8 162.0,1840.0 412.6,1837.1 692.9,1838.8 963.5,1838.5 1006.3,1833.4 1086.3,1801.5 1472.9,1771.6 1468.3,1573.7 1485.4,1563.5 1410.9,1138.1 1413.2,1138.2 1429.1,1138.2 1440.5,1138.3 1458.1,1138.5 1465.8,1138.4 1302.3,644.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0403__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[985.0,1832.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1305772125519,42.11537726047098]}},{"type":"Feature","properties":{"resourceCoords":[985.0,1138.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.13206392385993,42.11754413214936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0404/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p404","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0404/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0404","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"185.3,127.3 430.2,121.8 704.0,120.4 968.4,117.2 1010.1,111.6 1088.0,79.6 1465.3,46.1 1480.6,491.2 1446.0,536.4 1426.0,572.9 1419.2,639.5 1421.6,766.3 1424.3,1130.5 1425.3,1147.8 1423.6,1362.7 1417.3,1395.8 1429.2,1404.1 1431.9,1434.7 1430.3,1607.2 1432.5,1706.9 1432.2,1830.5 1434.8,1862.0 1405.5,1856.3 1405.0,1828.9 1405.1,1793.6 980.0,1892.2 869.4,1837.5 618.6,1818.3 470.8,1862.7 112.3,1832.2 81.0,1581.7 167.7,1397.9 112.1,1366.2 66.2,1255.3 52.6,400.8 109.3,128.0 185.3,127.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0404/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[970.0,1152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.128428,42.1119996]}},{"type":"Feature","properties":{"resourceCoords":[717.0,120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1317367,42.1149139]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0406/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p406","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0406/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0406","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.7,1926.2 69.2,478.7 48.4,479.2 60.9,311.2 116.5,226.1 210.6,253.0 254.0,203.3 348.4,238.6 425.6,204.4 463.5,139.9 583.9,101.0 760.7,161.9 1026.2,181.6 1465.8,72.4 1581.2,88.7 1632.0,833.3 1573.8,1609.8 1596.2,1837.3 1525.8,1874.6 1508.6,1914.5 1407.7,1917.2 1407.5,1907.0 980.6,1897.5 980.8,1903.3 546.1,1885.2 546.4,1901.4 242.5,1913.0 242.0,1881.5 96.8,1924.3 90.7,1926.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0406/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[645.0,1125.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.16712445762126,42.10160318711122]}},{"type":"Feature","properties":{"resourceCoords":[423.0,542.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.16929950464366,42.103185873022646]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0407/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p407","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0407/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0407","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"29.9,1872.9 112.1,1851.8 112.0,1886.2 112.0,1887.1 329.7,1900.2 329.7,1899.3 548.4,1876.3 548.4,1879.6 921.7,1876.7 921.9,1870.2 1202.7,1890.0 1202.6,1897.0 1439.7,1895.0 1441.0,1932.2 1445.3,1932.1 1446.8,1932.1 1470.0,1763.2 1471.3,1598.5 1471.6,1489.6 1559.0,1466.2 1575.2,1461.9 1580.5,1460.5 1582.3,1460.0 1597.4,1.0 1575.8,1.0 1574.4,14.0 1511.2,91.7 1198.5,55.4 859.4,64.5 522.2,120.7 285.1,75.4 112.3,103.5 39.4,712.0 62.1,836.1 38.2,1012.6 49.1,1833.8 29.9,1872.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0407/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1025.0,721.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.17194692928882,42.09962711881609]}},{"type":"Feature","properties":{"resourceCoords":[1475.0,381.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.17071689531285,42.101435954978264]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0408/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p408","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0408/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0408","type":"ImageService3","width":1685,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.8,1059.2 117.2,1673.8 114.0,1673.8 133.7,1925.4 162.2,1879.3 394.4,1880.6 543.5,1916.1 1615.9,1900.0 1658.1,1371.7 1658.5,648.3 1639.3,372.8 1600.3,299.6 1616.5,241.0 1587.3,156.1 1629.8,63.2 1528.6,63.5 1528.6,53.3 1100.6,33.5 1100.7,39.5 665.0,10.9 664.9,27.2 359.8,31.6 360.0,1.0 356.3,1.0 213.4,39.5 205.4,41.6 184.0,47.4 97.1,70.8 97.0,179.2 73.2,511.0 67.3,511.1 86.7,1059.2 79.8,1059.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0408/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1524.0,1356.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1593798,42.095951]}},{"type":"Feature","properties":{"resourceCoords":[360.0,0.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.167368,42.0985027]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0409/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p409","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0409/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0409","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"232.8,24.5 232.7,58.8 232.7,59.8 449.6,72.9 449.6,72.0 667.5,49.1 667.5,52.4 1039.5,49.6 1039.7,43.1 1319.5,62.9 1319.4,69.9 1555.7,67.9 1575.3,654.0 1568.5,654.0 1604.8,1269.6 1601.7,1269.6 1621.0,1521.6 1609.9,1539.4 1613.8,1862.3 1574.0,1909.4 1234.0,1871.6 1020.1,1908.2 666.8,1880.6 427.8,1925.8 181.8,1925.8 67.8,1894.8 49.0,1839.7 84.6,1419.5 60.0,1257.3 84.5,1173.5 41.2,718.6 75.6,614.6 50.1,564.6 84.7,477.4 72.6,425.6 119.0,365.0 113.6,308.1 49.7,260.1 48.9,151.3 72.2,129.4 60.0,60.9 148.6,50.2 150.9,45.6 232.8,24.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0409/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[675.0,1276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1688914,42.0911889]}},{"type":"Feature","properties":{"resourceCoords":[1580.0,654.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.1662775,42.0946405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0414/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p414","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0414/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0414","type":"ImageService3","width":1695,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"189.7,225.2 859.4,198.7 908.2,186.4 1014.2,182.3 1100.0,175.7 1159.2,163.8 1162.5,190.8 1227.4,164.3 1241.8,155.2 1455.0,1673.1 1451.0,1673.3 1419.0,1674.6 1419.0,1709.4 1421.5,1781.5 1063.0,1751.2 1050.8,1723.9 947.1,1728.8 656.0,1738.6 654.6,1715.8 378.0,1706.8 378.6,1724.8 62.0,1747.1 66.0,1309.9 101.5,1222.2 57.0,733.2 71.4,279.3 94.5,90.5 139.8,82.0 160.8,35.6 189.7,225.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0414/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1419.0,1692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0737931,42.0935751]}},{"type":"Feature","properties":{"resourceCoords":[159.0,731.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.081218,42.0948472]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0415/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p415","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0415/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0415","type":"ImageService3","width":1651,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"271.5,75.4 318.5,47.2 344.4,25.6 350.2,89.7 635.7,122.0 636.3,116.8 643.6,83.7 1228.2,108.8 1441.7,118.0 1472.3,114.8 1477.2,113.9 1506.7,625.5 1531.8,625.5 1530.1,1031.1 1529.5,1362.4 1501.5,1371.5 1533.1,1517.3 1547.0,1515.0 1517.1,1861.2 945.8,1915.4 673.1,1903.0 668.0,1918.5 480.3,1643.6 415.4,1643.8 416.2,1608.7 452.4,1608.0 271.5,75.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0415/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1343.0,634.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07184615543981,42.09816625505769]}},{"type":"Feature","properties":{"resourceCoords":[399.0,1598.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07392354758245,42.0936396138086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0416/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p416","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0416/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0416","type":"ImageService3","width":1695,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"176.3,1508.2 162.6,1510.3 132.3,1366.3 159.9,1357.5 162.2,1030.8 166.1,630.6 141.3,630.5 114.9,125.7 133.6,122.3 172.5,115.5 172.6,79.9 376.2,84.1 660.8,83.2 1058.1,80.0 1390.9,74.3 1436.4,73.4 1694.0,142.5 1694.0,219.0 1694.0,241.2 1662.9,243.7 1602.2,368.7 1649.4,959.2 1617.3,1231.7 1613.3,1893.3 718.5,1922.1 279.7,1888.5 161.7,1847.9 145.1,1849.4 176.3,1508.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0416/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[141.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07115883341434,42.09844196722016]}},{"type":"Feature","properties":{"resourceCoords":[1350.0,1622.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.06379662809525,42.097136528045056]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0417/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Erie, Pennsylvania | 1950 | sanborn07660_007 p417","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:38:26Z","modified":"2026-10-24T15:38:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0417/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0417","type":"ImageService3","width":1666,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"353.6,127.5 353.9,109.4 630.7,131.6 631.0,154.4 923.2,158.4 1027.5,158.4 1038.3,186.4 1396.3,233.8 1397.1,161.4 1461.9,162.8 1642.0,441.5 1617.9,509.0 1637.6,1213.3 1612.0,1856.0 1588.0,1894.9 1066.7,1931.2 323.8,1884.2 86.6,1839.8 30.5,1440.7 62.3,1077.8 41.3,574.0 52.0,574.0 72.0,567.0 71.0,521.0 39.1,521.0 28.2,259.8 35.2,134.8 353.6,127.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd382m:g3824m:g3824em:g3824em_g07660195002:07660_02_1950-0417/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1086.0,1174.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07288074714043,42.08980793291262]}},{"type":"Feature","properties":{"resourceCoords":[615.0,876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.07554032781908,42.08999041242567]}}]}}]}