{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn04159_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Huron, Michigan | 1898 | mapsnap generated fit (2026-10-20)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-20"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"42"},{"label":"placed","value":"17"},{"label":"unplaced","value":"25"},{"label":"fit sources","value":"georef-snap 11, georef 6"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"12 sheet(s) cut into 34 panels"},{"label":"unplaced pages","value":"p14__1 (tier 1, 42.96760,-82.42206 +/-100m); p14__2 (tier 1, 42.96735,-82.42310 +/-100m); p14__3 (tier 1, 42.96726,-82.42257 +/-102m); p15__2 (tier 1, 42.99177,-82.43088 +/-131m); p16__1 (tier 1, 42.98992,-82.42974 +/-100m); p16__3 (tier 1, 42.98855,-82.42969 +/-129m); p18__1 (tier 1, 42.97159,-82.42634 +/-229m); p18__2 (tier 1, 42.97167,-82.42882 +/-164m); p19__1 (tier 4, 42.97955,-82.42674 +/-2299m); p19__2 (tier 4, 42.97955,-82.42674 +/-2299m); p20__1 (tier 1, 42.97287,-82.42951 +/-195m); p20__2 (tier 1, 42.97325,-82.42963 +/-103m); p20__4 (tier 1, 42.97183,-82.43036 +/-110m); p20__5 (tier 3, 42.97274,-82.43002 +/-554m); p21__1 (tier 4, 42.97955,-82.42674 +/-2299m); p21__2 (tier 4, 42.97955,-82.42674 +/-2299m); p21__3 (tier 4, 42.97955,-82.42674 +/-2299m); p4__1 (tier 2, 42.97565,-82.42222 +/-124m); p4__2 (tier 1, 42.97636,-82.42179 +/-136m); p7__1 (tier 1, 42.98243,-82.43192 +/-266m); p7__2 (tier 1, 42.98290,-82.43375 +/-100m); p8__1 (tier 1, 42.97787,-82.43283 +/-149m); p8__2 (tier 1, 42.97859,-82.42713 +/-262m); p9__2 (tier 1, 42.97603,-82.43088 +/-100m); p9__3 (tier 1, 42.98428,-82.43953 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0010","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"129.8,856.9 56.6,1339.6 84.3,1848.7 248.8,1892.5 1403.5,1858.7 1407.3,1582.2 1414.8,1364.5 1421.0,786.8 1431.0,755.8 1583.3,810.7 1014.0,146.3 1045.0,64.7 1056.8,94.1 1074.1,24.8 1059.8,40.9 1011.6,1.0 1010.1,1.0 971.0,138.0 600.4,48.1 590.8,11.7 238.7,451.6 253.3,454.4 235.9,504.3 191.2,765.8 189.7,867.9 129.9,856.0 129.8,856.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[192.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42937715872445,42.974710912173535]}},{"type":"Feature","properties":{"resourceCoords":[876.0,1663.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.427476197963,42.973617840993086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0011","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"164.8,1143.2 169.5,921.6 168.3,334.1 178.1,302.4 333.6,356.3 137.1,132.8 846.7,293.5 834.0,328.1 829.0,347.0 1350.3,326.6 1350.6,175.1 1351.7,175.7 1354.4,177.2 1401.1,203.7 1572.2,204.3 1547.2,514.0 1559.0,597.2 1532.8,597.1 1539.0,1035.0 1569.2,1053.9 1554.7,1106.9 1550.2,1240.0 1542.8,1807.5 1164.7,1806.0 1124.2,1800.0 776.4,1800.4 722.5,1805.9 509.4,1800.0 162.3,1800.3 162.6,1746.2 195.1,1743.5 164.6,1424.3 164.8,1143.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1129.0,1208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42355682353718,42.97378462017229]}},{"type":"Feature","properties":{"resourceCoords":[171.0,1208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42605593374444,42.973707834162575]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p12 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.45"},{"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":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"203.6,972.8 201.0,1238.0 201.0,1683.0 199.0,1926.0 224.1,1926.0 252.7,1760.1 519.8,1770.4 652.8,1884.0 1486.7,1815.0 1459.3,1214.0 1311.1,933.6 1309.4,789.0 719.2,722.8 717.5,716.4 712.0,716.4 712.0,695.7 586.6,226.2 611.3,147.6 229.6,111.2 213.6,1.0 186.6,1.0 194.4,447.9 225.5,467.1 210.8,521.4 206.7,657.5 203.6,972.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[201.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4224118,42.9726736]}},{"type":"Feature","properties":{"resourceCoords":[201.0,1683.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.422368,42.9718431]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p12 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.85"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2848.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1857.6"},{"label":"split_canvas_h","value":"2865.6"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"726.2,572.2 743.2,572.2 743.1,669.5 785.5,669.5 786.9,713.6 1154.4,693.1 1163.4,110.8 801.4,109.7 743.9,109.7 731.5,115.0 726.2,572.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[756.0,133.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42603345915174,42.971723097776604]}},{"type":"Feature","properties":{"resourceCoords":[756.0,685.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42744910676852,42.971681486569935]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p12 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4685.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1826.4"},{"label":"split_canvas_h","value":"2850.0"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1201.1,156.8 1204.7,693.9 1572.4,688.0 1573.2,646.5 1543.7,497.5 1610.2,431.6 1540.2,79.0 1346.1,60.7 1201.1,156.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0012__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1561.0,666.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42560427852291,42.98331627502483]}},{"type":"Feature","properties":{"resourceCoords":[1207.4,666.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42653987341355,42.98327640947863]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p13","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"113.0,519.2 112.3,349.6 118.4,149.8 25.7,139.8 29.0,32.6 110.9,24.9 111.2,79.6 462.6,75.2 678.5,78.7 732.9,72.5 1085.0,68.0 1126.0,73.6 1508.8,70.5 1512.5,510.9 1512.4,751.5 1537.1,752.2 1511.7,907.1 1512.8,1815.4 1046.3,1865.7 904.8,1818.5 560.0,1865.3 175.0,1825.0 126.3,1779.7 119.2,1724.0 116.8,1115.7 118.2,1115.8 113.6,576.4 113.0,519.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1085.0,509.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42347,42.9718224]}},{"type":"Feature","properties":{"resourceCoords":[1085.0,68.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4235044,42.9726542]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p15 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"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":"4000.4"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.6,122.9 1068.0,14.1 184.7,74.0 52.4,349.3 58.9,743.2 143.7,858.2 387.2,990.2 1552.7,986.5 1599.2,723.3 1567.2,332.4 1612.3,259.7 1627.0,266.9 1627.0,263.1 1627.0,238.6 1425.2,148.8 1436.6,122.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[446.0,968.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4330604,42.9921283]}},{"type":"Feature","properties":{"resourceCoords":[992.0,1219.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4329973,42.9909876]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p15 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.53"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3275.6"},{"label":"split_canvas_y","value":"3947.6"},{"label":"split_canvas_w","value":"3236.4"},{"label":"split_canvas_h","value":"3760.4"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1581.7,1897.6 1603.6,1015.2 847.9,1016.0 836.9,1587.3 904.2,1752.5 849.0,1889.6 1581.7,1897.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0015__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[853.9,1576.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4361764501439,42.98507396403351]}},{"type":"Feature","properties":{"resourceCoords":[1496.2,1576.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.43517492704692,42.98404143297206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0016__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p16 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"confidence","value":"0.35"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0016__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0016","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"539.5,449.9 539.5,466.0 535.3,466.0 533.7,472.3 141.9,508.9 136.5,466.0 107.3,466.0 106.4,694.3 79.6,706.1 61.4,1151.2 121.7,1382.5 61.4,1798.2 388.6,1860.9 733.6,1740.8 1078.0,1760.4 1161.4,1846.0 1357.2,1893.8 1528.2,1859.5 1529.8,1572.8 1235.8,666.6 1202.3,91.2 981.6,93.4 940.6,39.6 618.4,146.3 539.5,449.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0016__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[481.0,1139.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4289764,42.9899816]}},{"type":"Feature","properties":{"resourceCoords":[106.0,1139.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4299171,42.9899425]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p17","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"692.6,130.2 946.2,31.2 1219.1,43.6 1381.5,212.8 1544.1,237.5 1371.9,276.4 1358.8,744.5 1377.5,1528.3 1542.8,1582.3 1490.8,1878.1 1315.8,1887.7 70.3,1850.9 61.5,381.6 136.5,125.5 692.6,130.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[712.0,1132.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4281956,43.0003261]}},{"type":"Feature","properties":{"resourceCoords":[712.0,303.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.426081,43.0005604]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0018__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p18 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5616.0"},{"label":"split_canvas_w","value":"2441.2"},{"label":"split_canvas_h","value":"2092.0"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0018__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0018","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"606.4,1885.7 606.6,1869.2 562.0,1868.3 578.1,1533.3 453.4,1452.9 376.6,1502.6 48.0,1493.8 17.6,1835.1 62.4,1921.2 468.5,1919.8 468.8,1926.0 511.7,1926.0 512.1,1884.9 606.4,1885.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0018__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[519.2,1455.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42744548025688,42.97253637661836]}},{"type":"Feature","properties":{"resourceCoords":[519.2,1862.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42739374903326,42.97175163175882]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"109.8,872.5 93.3,85.7 338.5,79.8 825.8,79.3 1235.7,81.4 1594.9,85.4 1627.0,85.7 1627.0,1005.4 1625.8,1206.3 1616.6,1380.5 1536.2,1535.7 1627.0,1586.5 1627.0,1647.3 1627.0,1736.8 1106.7,1757.7 1111.6,1739.0 1124.2,1704.6 415.8,1546.4 24.6,1106.2 54.8,1023.4 67.3,1052.8 109.8,872.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42751179182551,42.97870311716716]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42325632196832,42.978829457816204]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42305335300007,42.975118247160985]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42730882285726,42.97499190651194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0020__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p20 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.35"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3300.0"},{"label":"split_canvas_y","value":"3682.0"},{"label":"split_canvas_w","value":"3212.0"},{"label":"split_canvas_h","value":"1325.2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0020__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0020","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1490.3,1249.3 1559.0,1216.4 1559.5,1160.6 1498.0,942.7 1318.8,992.4 1026.9,934.3 938.0,944.5 873.8,1051.0 873.6,1204.5 1490.3,1249.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0020__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[825.0,920.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.43114295885829,42.97297816276678]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,920.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42913341984803,42.973050647229776]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1251.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42909279860905,42.97243920944726]}},{"type":"Feature","properties":{"resourceCoords":[825.0,1251.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.43110233761931,42.97236672498426]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.36"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.5,1783.5 92.3,1746.3 88.6,1450.2 91.1,1348.7 87.8,1093.2 92.6,727.5 110.4,669.6 132.7,668.9 78.5,444.0 61.2,442.9 74.9,231.8 205.4,236.7 334.5,96.1 450.5,121.3 728.6,41.8 1402.0,60.3 1562.1,191.1 1525.0,626.0 1564.4,676.0 1571.8,1569.8 1627.0,1574.0 1627.0,1600.8 1627.0,1741.6 1601.4,1787.5 1549.6,1880.6 1397.0,1802.0 1226.0,1793.3 1028.4,1792.7 125.5,1794.9 125.5,1783.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.41848462348695,42.97904354182828]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.41832070640868,42.975850584818964]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42345027159766,42.97570763245211]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-82.42361418867593,42.978900589461425]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1571.3,1682.0 1558.2,1821.8 1441.9,1753.6 979.8,1726.8 664.3,1881.7 82.2,1870.7 77.1,388.1 194.7,389.3 197.1,136.2 695.2,139.2 1155.0,137.1 1594.4,144.2 1593.8,187.7 1589.0,545.1 1586.1,952.9 1585.3,1437.7 1590.8,1681.6 1571.3,1682.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[213.0,540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42441501109073,42.981287347008085]}},{"type":"Feature","properties":{"resourceCoords":[213.0,1328.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42648516498865,42.98122239078287]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p6","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0006","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,364.5 1.0,482.8 254.8,482.6 257.0,984.0 264.0,1446.8 261.3,1889.1 299.1,1854.7 601.0,1849.3 704.5,1851.2 965.0,1846.4 1338.0,1849.2 1397.1,1867.1 1397.9,1890.1 1627.0,1833.1 1627.0,1815.3 1582.6,1812.7 1551.7,589.9 1460.0,586.9 1352.4,421.0 1367.5,174.3 1198.2,168.8 1137.9,68.0 1012.1,28.6 277.6,33.0 78.7,68.9 33.8,364.1 1.0,364.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[639.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4223103,42.9804173]}},{"type":"Feature","properties":{"resourceCoords":[257.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.4233077,42.9803936]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0009__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Huron, Michigan | 1898 | sanborn04159_003 p9 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.54"},{"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":"2026-10-20T00:41:26Z","modified":"2026-10-20T00:41:26Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0009__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1554.2,951.0 1476.9,792.0 1212.3,791.7 1209.3,791.7 1209.3,791.6 1122.5,187.1 1049.5,197.4 794.0,25.3 228.8,31.4 89.0,96.1 53.4,838.6 94.0,862.6 44.0,929.3 81.3,1870.0 1248.3,1904.7 1249.2,1926.0 1266.3,1926.0 1314.0,1926.0 1294.5,1819.4 1286.8,1537.7 1294.5,1482.1 1278.7,1482.3 1554.2,951.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114pm:g041591898:04159_1898-0009__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[641.0,1511.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.43093076529529,42.976012665262964]}},{"type":"Feature","properties":{"resourceCoords":[1285.0,1511.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-82.42933674584232,42.97584633718491]}}]}}]}