{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04073_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Laurium, Michigan | 1949 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"34"},{"label":"placed","value":"30"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef-snap 19, georef 11"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"4 sheet(s) cut into 10 panels"},{"label":"unplaced pages","value":"p15__2 (tier 1, 47.23235,-88.45972 +/-127m); p15__3 (tier 1, 47.23063,-88.45914 +/-127m); p28__1 (tier 1, 47.23566,-88.43640 +/-159m); p28__3 (tier 1, 47.23204,-88.43850 +/-126m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.72"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0010","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"105.1,1926.0 104.5,1926.0 103.8,1926.0 53.4,1216.2 140.5,1089.5 47.4,885.5 33.3,105.5 55.2,78.3 973.6,126.7 973.0,157.8 1548.6,131.0 1599.2,127.3 1604.7,824.9 1605.2,1162.7 1627.0,1553.0 1627.0,1829.4 1602.0,1822.6 1012.8,1782.8 1012.5,1804.2 310.8,1743.1 211.1,1612.3 105.1,1926.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1588.0,628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.45021589459851,47.2393650779988]}},{"type":"Feature","properties":{"resourceCoords":[1012.0,142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.45079896998715,47.240733102820805]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1508.2,1856.5 1503.5,1926.0 1559.3,1916.3 1562.5,1859.7 1605.5,1862.3 1611.7,1581.4 1608.5,1162.9 1558.2,203.2 1627.0,199.4 1559.0,182.1 1566.2,110.3 1563.1,40.4 1562.5,27.6 1200.2,62.9 1205.4,97.6 1046.1,73.0 907.4,63.1 394.0,39.9 50.0,21.0 17.8,693.9 1.0,1001.4 1.0,1816.5 882.2,1854.1 882.2,1819.5 1508.2,1856.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1584.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4482998,47.2355152]}},{"type":"Feature","properties":{"resourceCoords":[50.0,21.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4494169,47.2401404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0012/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"911.9,1831.2 1578.2,1797.3 1580.1,1749.3 1627.0,1752.3 1627.0,1723.7 1590.9,1682.3 1615.0,1676.8 1582.3,1075.5 1587.8,903.8 1603.2,809.7 1585.5,724.9 1554.7,302.8 1601.4,299.1 1564.8,1.0 1556.7,1.0 1565.9,140.0 1539.8,134.7 933.3,134.1 934.5,155.9 211.2,141.1 100.2,13.9 11.6,342.6 61.5,705.1 32.2,1762.6 40.1,1794.8 911.0,1815.9 911.9,1831.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[952.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4542382975323,47.23729403521505]}},{"type":"Feature","properties":{"resourceCoords":[1570.0,1716.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4545728537067,47.23513021319957]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p13 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"7.7,1510.8 8.7,1511.0 10.2,1484.0 305.1,1861.5 527.6,1907.7 988.4,1870.2 966.2,1355.6 1017.5,1108.0 1476.1,1110.8 1604.7,1057.5 1621.0,281.9 1570.0,169.2 1627.0,126.8 1627.0,25.9 975.1,31.7 977.6,67.5 14.1,91.8 21.8,505.6 34.5,589.2 14.5,680.3 1.0,836.1 1.0,1446.0 7.7,1510.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[78.0,576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.45288584066222,47.23639043101853]}},{"type":"Feature","properties":{"resourceCoords":[1353.0,21.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44910046010399,47.23589694189106]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p13 [2]","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":"4041.6"},{"label":"split_canvas_y","value":"4432.0"},{"label":"split_canvas_w","value":"2470.4"},{"label":"split_canvas_h","value":"3276.0"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1017.0,1169.2 1051.3,1224.8 1040.0,1904.4 1574.1,1911.0 1591.0,1882.5 1615.3,1841.4 1616.6,1695.4 1617.5,1590.1 1382.3,1195.0 1378.8,1131.2 1343.9,1130.4 1017.4,1121.8 1017.0,1169.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0013__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1365.2,1127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44696266036327,47.23493939113222]}},{"type":"Feature","properties":{"resourceCoords":[1192.3,1127.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44737087319017,47.23510627176728]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p14","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.73"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"120.3,1925.8 799.4,1891.3 795.8,1866.1 1257.0,1842.0 1577.7,1835.8 1627.0,978.9 1525.5,369.8 1570.4,311.4 1601.8,314.1 1290.8,1.0 1217.4,1.0 1218.3,47.2 566.7,123.5 565.0,108.6 1.0,132.2 1.0,216.6 46.9,258.4 44.4,1866.6 129.1,1897.7 120.3,1925.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.45712786836899,47.236573449666295]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.45375544599149,47.2345632067867]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.45724860182874,47.23184409437552]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.46062102420623,47.23385433725511]}},{"type":"Feature","properties":{"resourceCoords":[1216.0,-64.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4544927,47.2351624]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p15 [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":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"5869.6"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"391.6,886.8 632.0,886.8 632.0,887.1 650.2,924.5 645.9,1124.7 399.8,1269.8 393.6,1330.8 471.8,1368.8 540.0,1303.5 659.1,1391.7 758.8,1319.1 856.2,1369.2 1563.6,1067.0 1613.8,421.0 1537.5,111.5 1545.6,22.4 1224.5,19.2 762.1,29.9 764.9,55.1 84.2,69.9 57.6,146.2 144.8,297.8 170.5,751.2 278.6,848.5 328.9,807.1 352.1,881.0 391.6,886.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.46042646021233,47.23390902507672]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.45697377936735,47.23196911849975]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1467.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.45953006671192,47.229841572261456]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1467.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.46298274755691,47.23178147883843]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p16","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0016","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1237.1,1760.0 1237.2,1767.2 1627.0,1768.2 1627.0,1757.3 1556.3,1756.8 1557.3,1714.3 1560.3,800.8 1558.9,216.7 1524.7,234.7 1512.1,94.5 1354.0,176.2 1310.5,295.9 1125.2,391.6 1043.3,280.1 979.1,297.0 813.5,180.2 388.1,124.7 338.4,1.0 279.3,1.0 204.9,714.1 120.2,770.0 108.5,1678.0 70.2,1671.0 1.0,1661.7 1.0,1772.0 363.2,1768.5 1237.1,1760.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[586.0,1754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4421509,47.2409151]}},{"type":"Feature","properties":{"resourceCoords":[1085.0,1754.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4409265,47.2404856]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p17","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"102.7,1850.8 99.2,929.4 93.5,340.2 59.2,358.6 45.5,217.3 111.4,182.7 97.2,124.5 331.1,132.8 651.6,19.7 677.8,27.8 720.5,5.6 720.8,59.0 1107.3,51.4 1107.3,27.6 1384.5,70.5 1518.1,70.1 1544.6,95.3 1542.7,921.8 1544.8,1907.9 1110.9,1914.2 1110.8,1900.1 228.4,1904.3 173.3,1904.6 173.2,1893.7 102.0,1893.7 102.7,1850.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1106.0,928.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4361097,47.2407957]}},{"type":"Feature","properties":{"resourceCoords":[360.0,928.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4379178,47.241441]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p18 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3194.4"},{"label":"split_canvas_w","value":"3636.4"},{"label":"split_canvas_h","value":"4513.6"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.5,1851.4 880.2,1847.1 896.4,1328.0 808.5,1061.2 863.3,992.0 811.1,1002.4 757.0,886.0 510.9,884.5 511.0,866.9 65.8,859.3 58.5,1851.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[514.0,868.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43397041944282,47.240034593056016]}},{"type":"Feature","properties":{"resourceCoords":[76.0,868.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43503011710176,47.24040422840607]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p18 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"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":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1614.5,1679.7 1591.2,1630.4 1607.2,459.0 1551.9,100.0 1436.3,36.6 1181.5,54.0 915.6,192.7 659.9,161.1 458.0,216.9 95.2,43.2 43.9,103.0 38.4,741.0 27.0,745.0 53.3,753.2 96.3,731.0 96.5,784.9 486.1,778.4 486.3,754.5 765.5,798.6 900.2,798.6 926.8,824.1 922.2,1657.2 1368.0,1662.0 1368.0,1679.7 1614.5,1679.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1368.0,1662.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4339757,47.24004]}},{"type":"Feature","properties":{"resourceCoords":[482.0,1662.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4361097,47.2407957]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0019","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.1,1643.3 214.4,1628.8 213.9,1655.9 212.4,1728.5 200.1,1802.3 563.5,1902.5 959.6,1912.7 1389.0,1911.3 1427.8,1913.0 1437.8,997.5 1447.3,35.7 1447.2,1.0 166.5,1.0 161.2,339.5 161.8,846.5 156.4,1254.6 161.8,1331.7 205.9,1532.6 191.1,1643.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1452.0,943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4417282867504,47.23875352603427]}},{"type":"Feature","properties":{"resourceCoords":[591.0,1890.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44504677395459,47.23789074592039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"666.4,1896.2 618.8,1912.9 583.3,1926.0 583.4,1901.6 17.7,1900.2 68.4,1889.0 63.4,26.8 446.0,27.7 519.9,83.0 593.7,22.9 1443.7,19.1 1520.8,27.8 1585.5,133.9 1614.3,1864.1 966.9,1878.2 947.7,1894.2 666.4,1896.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1124.0,941.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43437292855309,47.25151887906904]}},{"type":"Feature","properties":{"resourceCoords":[1124.0,12.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43293018213593,47.252929485938594]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0020","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"184.8,1903.1 1488.4,1897.9 1488.2,1893.8 1486.9,1848.8 1483.0,948.1 1485.2,31.1 1485.1,1.0 181.4,1.0 181.8,28.4 183.8,983.9 184.8,1893.5 184.8,1903.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[164.0,937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44182029406163,47.238770058532346]}},{"type":"Feature","properties":{"resourceCoords":[1492.0,937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43852690619674,47.23760825589473]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0021","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"160.7,1915.2 591.8,1922.3 816.3,1926.0 1448.9,1926.0 1569.7,1810.2 1568.7,1078.1 1505.2,651.5 1540.7,102.2 1411.8,22.7 1412.6,1.0 175.8,1.0 175.7,17.4 164.3,943.4 159.4,1852.8 160.2,1898.4 160.7,1915.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[600.0,940.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43748410367331,47.237232801414144]}},{"type":"Feature","properties":{"resourceCoords":[600.0,21.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43633369822349,47.23877288617214]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p22","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0022","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.8,1802.5 154.7,1780.5 368.8,1816.5 372.3,1768.8 700.1,1799.0 961.7,1822.0 1020.0,1838.9 1019.8,1821.9 1462.5,1820.5 1463.5,1098.2 1467.4,380.5 1464.8,78.5 1425.4,77.1 989.4,82.6 587.2,76.1 304.6,1.0 215.3,1.0 211.8,1012.6 190.5,1453.2 167.6,1748.3 122.4,1743.1 115.8,1802.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1464.0,1056.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4442295,47.2355295]}},{"type":"Feature","properties":{"resourceCoords":[1020.0,82.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4440864,47.2375146]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0023","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.1,1769.3 607.4,1839.0 608.2,1769.3 1051.7,1866.2 1052.0,1916.0 1483.0,1917.8 1484.3,953.9 1494.2,250.1 1491.0,36.5 1489.9,1.0 182.1,1.0 184.1,286.8 179.2,991.4 177.1,1769.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[615.0,943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44314280312678,47.23516450692345]}},{"type":"Feature","properties":{"resourceCoords":[177.0,943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44422769740835,47.235543512260946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0024","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"218.2,1903.8 645.2,1900.6 1513.7,1891.5 1514.1,1926.0 1544.7,1926.0 1565.9,1391.2 1513.5,604.9 1570.8,453.7 1482.4,1.0 205.7,1.0 206.7,23.8 212.1,237.2 209.5,940.5 218.2,1903.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1073.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44007386119081,47.232088746913654]}},{"type":"Feature","properties":{"resourceCoords":[194.0,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44224064716718,47.232865368135684]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0025","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"884.0,1905.3 911.8,1895.0 929.1,1926.0 991.8,1926.0 1014.1,1926.0 1582.5,1117.4 1604.6,1087.1 1608.3,1025.4 1611.0,334.9 1610.2,284.5 1160.0,191.7 1160.0,262.2 723.7,196.8 723.0,127.0 283.0,132.8 283.4,149.8 225.4,133.5 1.0,116.1 1.0,182.0 213.3,588.5 197.3,839.8 210.7,819.8 333.9,941.7 421.8,1107.6 274.9,1185.3 325.6,1281.0 266.3,1369.6 405.2,1647.4 391.6,1760.8 682.2,1754.0 858.2,1824.2 884.0,1905.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[397.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44699556256936,47.233258140891344]}},{"type":"Feature","properties":{"resourceCoords":[1174.0,761.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44491163211376,47.23282835243403]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p26","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0026","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"614.6,1840.0 683.3,1870.2 706.5,1839.7 1362.0,1837.5 1358.4,954.1 1358.0,519.9 1358.0,81.9 665.0,73.9 603.0,69.7 289.0,507.0 1.0,910.5 1.0,951.4 2.0,951.6 29.5,955.0 393.4,957.0 393.1,1438.4 385.7,1840.7 614.6,1840.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[289.0,507.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4436175,47.2310197]}},{"type":"Feature","properties":{"resourceCoords":[1360.0,1399.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4400947,47.232023]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p27","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0027","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"476.9,1800.0 479.0,1752.0 1216.5,1749.0 1595.2,1746.0 1591.4,1216.6 1612.6,1187.9 1613.9,1187.3 1591.1,1155.6 1589.0,658.0 1588.4,119.6 1550.8,119.1 558.3,122.6 509.0,53.0 524.4,20.8 499.7,4.0 404.6,129.8 167.4,245.5 153.0,611.8 38.4,903.1 32.5,1574.2 1.0,1624.6 1.0,1659.3 264.8,1784.3 396.6,1846.7 426.5,1853.5 459.4,1835.6 476.9,1800.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1589.0,658.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4436175,47.2310197]}},{"type":"Feature","properties":{"resourceCoords":[479.0,1752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4449812,47.2282713]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0028__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p28 [2]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1956.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4555.2"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0028__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0028","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"495.9,1891.5 883.6,1608.1 939.1,1556.6 1016.1,1511.3 1594.0,1089.0 1560.7,1064.0 1561.5,1040.2 1480.0,32.5 1164.5,27.4 683.1,28.0 681.9,392.0 678.6,419.5 677.7,422.9 688.7,456.9 1121.2,762.2 903.0,1071.8 490.7,1652.1 513.7,1702.6 532.4,1737.5 527.8,1774.8 504.8,1795.0 493.9,1801.1 495.9,1891.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0028__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1126.1,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4413149,47.2304244]}},{"type":"Feature","properties":{"resourceCoords":[683.2,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.442391,47.230806]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p29","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"27"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0029","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.4,1235.2 255.8,1272.6 180.6,1502.2 153.3,1465.9 124.7,1526.5 48.2,1688.5 35.1,1749.6 83.7,1855.8 1054.1,1891.0 1153.7,1831.0 1512.6,1823.8 1512.8,1766.7 1291.3,1647.0 1343.8,1542.8 1435.2,1515.3 1542.7,1569.4 1559.1,1536.8 1595.0,979.0 1570.8,881.1 1581.3,616.9 1534.8,360.6 1570.9,256.3 1527.0,221.9 1545.2,120.9 1494.8,75.0 1369.2,89.4 1167.0,53.0 857.1,76.6 715.0,115.3 579.3,238.9 435.9,207.6 212.8,74.8 88.9,69.6 5.1,276.6 1.0,274.8 1.0,329.9 5.2,335.6 72.9,428.8 37.0,453.8 366.1,841.5 372.8,851.5 393.8,851.9 281.6,1194.1 263.4,1235.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[873.0,851.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4403456,47.2266893]}},{"type":"Feature","properties":{"resourceCoords":[257.0,1551.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4452601,47.22756]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.8,1871.6 36.9,1811.8 14.7,1811.8 58.8,239.5 130.6,122.9 553.2,116.7 574.1,42.1 693.3,19.1 1258.3,36.2 1257.2,69.5 1293.3,48.5 1341.3,33.2 1622.4,39.1 1578.8,73.6 1587.5,1792.5 1612.8,1795.4 1612.4,1838.4 1234.4,1857.8 1234.5,1851.5 595.6,1847.2 595.5,1779.5 559.1,1779.2 561.0,1887.3 34.8,1871.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[590.0,1506.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44079037557098,47.249030330499956]}},{"type":"Feature","properties":{"resourceCoords":[1254.0,106.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.43718789818226,47.2505264253851]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"987.3,24.9 141.5,11.7 27.4,103.8 56.5,1706.9 22.2,1861.6 1571.3,1900.5 1571.5,1893.8 1568.4,1893.7 1534.8,75.2 1008.2,59.9 1010.2,1.0 988.0,1.0 987.3,24.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[991.0,1243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44440567769145,47.247213452680725]}},{"type":"Feature","properties":{"resourceCoords":[991.0,1863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44533029978895,47.246254455557725]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1598.1,1860.7 1597.7,1784.3 1576.7,1745.2 1588.4,158.8 1587.8,58.0 1120.6,8.0 1120.5,50.5 747.0,72.5 747.0,66.3 115.4,66.9 114.8,1.0 78.8,1.0 127.1,1902.5 130.2,1902.7 735.0,1907.0 1313.6,1909.2 1313.4,1891.0 1598.1,1860.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[738.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44259419865303,47.24505450377721]}},{"type":"Feature","properties":{"resourceCoords":[116.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44402253907082,47.245698795119154]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p6","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.39"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"22.1,336.5 77.3,71.2 1576.0,90.4 1576.0,1218.9 1576.8,1301.4 1577.1,1377.2 1575.7,1832.9 54.6,1838.3 49.3,1831.9 22.1,336.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1576.0,1718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4466199,47.2430272]}},{"type":"Feature","properties":{"resourceCoords":[1576.0,84.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4440537,47.2456192]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0007","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"60.8,1783.2 270.9,1782.6 641.8,1788.0 1409.1,1791.0 1530.4,1793.2 1569.8,1796.0 1476.7,879.8 1555.5,813.7 1548.0,85.7 1607.1,78.9 1564.9,1.0 1547.1,1.0 1547.6,44.9 1259.6,76.9 1259.8,95.4 674.1,95.8 61.9,94.3 61.1,1267.4 62.1,1431.0 60.8,1783.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1256.0,1095.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44287209143475,47.242852254639374]}},{"type":"Feature","properties":{"resourceCoords":[89.0,88.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.4439828177021,47.24560088213696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.73"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1541.2,1856.0 950.9,1881.6 951.6,1849.8 10.1,1797.2 65.0,1729.8 73.7,1504.5 151.3,1330.2 147.8,1139.3 64.7,1080.2 49.1,142.2 8.0,91.9 1585.7,96.6 1582.8,675.0 1593.0,1852.4 1541.2,1856.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1570.0,39.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44675000413,47.24294970810663]}},{"type":"Feature","properties":{"resourceCoords":[1570.0,1852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44946831577937,47.240164512728036]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Laurium, Michigan | 1949 | sanborn04073_002 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:07:48Z","modified":"2026-10-19T10:07:48Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1253.0,1857.3 1260.1,1893.5 1091.6,1875.4 945.4,1871.7 405.1,1872.3 43.0,1869.1 40.5,703.0 48.0,50.7 48.9,12.2 257.7,14.2 626.2,24.2 1388.5,36.7 1437.8,38.2 1449.1,148.8 1398.8,154.5 1431.7,496.9 1489.3,1007.1 1529.9,1418.6 1544.0,1495.6 1611.0,1692.9 1608.6,1806.0 1253.0,1857.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114lm:g040731949:04073_1949-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[67.0,670.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44756421822824,47.24198410192433]}},{"type":"Feature","properties":{"resourceCoords":[1574.0,1853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.44587933561603,47.23860744958774]}}]}}]}