{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03907_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alpena, Michigan | 1895 | 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":"43"},{"label":"placed","value":"26"},{"label":"unplaced","value":"17"},{"label":"fit sources","value":"georef 14, georef-snap 10, snap:2 1, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 23 panels"},{"label":"unplaced pages","value":"p10__2 (tier 1, 45.07112,-83.43506 +/-100m); p11__1 (tier 3, 45.07493,-83.43664 +/-548m); p11__2 (tier 3, 45.07493,-83.43664 +/-548m); p12__2 (tier 1, 45.05353,-83.44131 +/-100m); p12__3 (tier 1, 45.07539,-83.44811 +/-150m); p12__4 (tier 1, 45.07850,-83.44157 +/-100m); p12__5 (tier 2, 45.07400,-83.44792 +/-100m); p28__1 (tier 2, 45.06036,-83.42935 +/-100m); p28__2 (tier 1, 45.06020,-83.43141 +/-100m); p28__3 (tier 1, 45.05993,-83.43121 +/-100m); p28__4 (tier 2, 45.06036,-83.42935 +/-100m); p29__1 (tier 1, 45.06146,-83.45534 +/-262m); p4__2 (tier 1, 45.05755,-83.44097 +/-129m); p4__3 (tier 1, 45.05732,-83.44162 +/-132m); p5__1 (tier 3, 45.06559,-83.43749 +/-1058m); p5__3 (tier 1, 45.06511,-83.42515 +/-100m); p6 (tier 1, 45.06377,-83.42792 +/-262m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p10 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.63"},{"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":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0010","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"42.6,1672.5 784.2,1799.2 773.9,1719.6 819.9,1744.0 1323.4,1763.5 1323.6,1800.1 1318.3,1926.0 1327.8,1888.7 1564.8,1757.9 1539.2,1339.5 1595.9,1015.6 1540.8,629.8 1599.8,248.7 1476.0,47.6 1200.3,24.8 1119.7,70.2 1088.5,419.0 1088.5,424.9 1088.5,444.7 1088.4,444.7 777.1,480.7 490.6,448.1 489.9,444.7 486.1,444.7 486.0,426.2 443.6,227.7 332.8,186.5 144.7,154.2 90.9,213.6 122.7,214.8 103.8,1218.7 96.1,1214.1 42.6,1672.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[793.0,1770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.43540911429143,45.070972842608576]}},{"type":"Feature","properties":{"resourceCoords":[1323.0,1770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4343841979361,45.07162911886677]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p12 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.49"},{"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":"3330.4"},{"label":"split_canvas_h","value":"3928.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0012","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"398.4,16.4 58.2,102.8 38.3,802.7 503.2,930.5 769.2,815.7 633.6,591.5 766.6,534.1 770.1,158.3 398.4,16.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0012__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":[-83.44964902940427,45.07502713761844]}},{"type":"Feature","properties":{"resourceCoords":[832.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4488569475067,45.07554427942105]}},{"type":"Feature","properties":{"resourceCoords":[832.6,982.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4479997093559,45.07488021346723]}},{"type":"Feature","properties":{"resourceCoords":[0.0,982.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44879179125348,45.07436307166462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p13","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0013","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,1728.3 1.0,1805.1 489.4,1808.1 1020.9,1814.1 1519.0,1811.0 1519.1,1826.6 1583.4,1853.4 1548.7,1781.3 1574.2,133.8 1437.4,36.7 549.4,26.7 306.8,87.8 249.7,20.2 81.1,39.1 48.5,335.8 133.6,493.9 49.7,1109.4 53.8,1666.1 1.0,1728.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[985.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4450241,45.0735709]}},{"type":"Feature","properties":{"resourceCoords":[1519.0,1811.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4427898,45.0732434]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p14","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0014","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1436.8,1837.4 1436.9,1814.3 1536.4,1815.8 1539.6,1279.0 1548.0,232.9 1551.2,193.9 1499.5,1.0 1498.2,1.0 1458.4,40.3 922.9,23.4 741.0,88.8 495.1,60.5 479.1,124.0 289.6,86.3 232.1,113.5 204.7,178.0 189.0,178.0 188.8,679.2 179.2,1213.9 172.9,1706.4 96.8,1705.8 116.5,1722.9 60.9,1810.0 186.1,1888.8 1431.9,1831.9 1436.8,1837.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[865.0,1806.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4448603,45.0703404]}},{"type":"Feature","properties":{"resourceCoords":[189.0,178.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4427898,45.0732434]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0015","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1567.0,642.8 1563.5,563.5 1400.2,554.2 1458.5,116.0 998.8,79.5 1003.1,71.7 1.0,89.8 1.0,122.5 50.6,164.2 81.7,524.8 73.5,534.6 129.1,733.2 126.2,772.2 129.4,1817.7 1515.8,1812.1 1516.5,1231.6 1566.0,642.8 1567.0,642.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[826.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4393304,45.0703355]}},{"type":"Feature","properties":{"resourceCoords":[148.0,1818.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4426378,45.0700049]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p16","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0016","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.4,763.9 38.5,1242.9 86.2,1890.2 1383.8,1893.6 1402.5,1926.0 1430.0,1926.0 1489.8,1926.0 1490.7,1768.9 1492.0,1169.0 1491.6,631.8 1492.0,92.0 99.5,91.5 99.9,630.5 1.0,629.7 1.0,653.9 98.4,763.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1492.0,1169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4424607,45.0668004]}},{"type":"Feature","properties":{"resourceCoords":[1492.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4403252,45.0680808]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p17","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0017","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1522.1,1926.0 1448.0,1926.0 1354.1,1888.7 78.2,1888.1 86.4,1434.4 50.3,1372.4 137.6,1372.1 137.9,1215.2 137.1,615.7 134.8,78.9 1509.9,72.7 1513.4,348.8 1512.2,619.6 1519.8,1691.8 1522.1,1926.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[824.0,1162.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4423957,45.0651875]}},{"type":"Feature","properties":{"resourceCoords":[824.0,76.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4402342,45.0664742]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p18","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0018","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.4,1826.1 138.1,1293.9 135.2,719.0 180.5,135.5 1392.4,118.3 1489.2,123.2 1513.2,892.0 1501.1,892.2 1521.5,1282.7 1500.0,1283.0 1500.3,1810.3 143.4,1826.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[817.0,1283.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4391588,45.0671209]}},{"type":"Feature","properties":{"resourceCoords":[1500.0,1283.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4380076,45.0661421]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p19","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0019","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"155.8,1266.0 177.3,1265.8 157.7,875.4 169.8,875.3 147.2,106.8 1354.1,169.9 1550.8,868.9 1510.0,869.0 1515.0,1313.7 1514.5,1523.7 1518.9,1788.5 837.6,1795.0 155.2,1793.1 155.8,1266.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0019/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[833.0,1258.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4368468,45.0651823]}},{"type":"Feature","properties":{"resourceCoords":[1510.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4349142,45.0646775]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p20","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0020","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"140.4,688.8 141.9,418.4 138.8,142.7 829.6,149.1 1519.4,147.1 1521.1,417.8 1520.4,946.9 1524.6,1209.9 1523.7,1461.5 1525.0,1715.8 832.6,1755.9 146.6,1759.5 140.4,688.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[832.0,687.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4389945,45.0638922]}},{"type":"Feature","properties":{"resourceCoords":[832.0,1218.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4400518,45.0632612]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0021","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"134.1,430.8 133.5,199.1 813.3,199.7 1499.5,164.3 1499.5,235.3 1505.2,284.7 1532.6,313.6 1473.5,382.4 1521.8,423.9 1517.2,883.0 1494.9,936.5 1492.1,1046.8 1489.2,1637.8 1530.0,1638.5 1627.0,1640.4 1627.0,1658.6 1570.0,1725.2 1565.4,1864.5 1494.6,1880.4 63.8,1888.7 74.5,435.8 60.8,430.2 134.1,430.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1482.0,1105.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.44178740716646,45.060583392394506]}},{"type":"Feature","properties":{"resourceCoords":[137.0,1267.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.44441169090159,45.06228653118233]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0022","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1533.3,1628.8 1536.2,1794.0 1475.5,1876.5 434.1,1872.3 288.2,1869.8 287.2,1869.7 189.8,1868.0 148.8,1867.3 150.6,1273.9 153.2,1163.1 175.5,1109.3 179.3,648.3 130.7,606.7 189.9,537.5 424.5,270.0 839.1,203.0 840.5,262.5 1520.0,268.3 1521.9,764.9 1519.5,811.9 1518.4,1552.3 1598.6,1552.2 1533.3,1628.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[831.0,804.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4395609416493,45.06024546616354]}},{"type":"Feature","properties":{"resourceCoords":[1502.0,1345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4394990393632,45.05865120046589]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0023","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.4,1776.5 168.0,1727.7 170.1,1408.9 173.9,1162.7 172.8,905.4 179.4,387.9 180.8,123.0 808.2,134.8 900.1,137.9 1485.8,147.2 1529.4,159.5 1527.3,262.5 1490.8,352.9 1446.3,404.4 1464.8,420.8 1516.3,482.3 1525.2,534.2 1518.3,1028.4 1509.7,1550.0 841.8,1539.5 840.8,1480.9 432.8,1543.9 200.3,1805.2 173.4,1776.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[844.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4366870907211,45.061963028183754]}},{"type":"Feature","properties":{"resourceCoords":[1510.0,292.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.43478651297171,45.06146683888261]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p24","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0024","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.0,1532.7 173.4,1321.3 168.3,873.7 209.4,873.6 11.2,170.1 62.7,172.8 301.2,128.4 302.4,65.0 1537.5,75.2 1537.6,110.4 1537.9,199.1 1540.2,249.6 1543.6,325.4 1550.6,444.7 1532.4,524.6 1526.1,767.7 1536.9,1216.0 1535.7,1252.7 1534.1,1300.2 1548.7,1811.2 1504.2,1799.5 908.8,1801.0 815.4,1799.6 177.5,1799.3 173.0,1532.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[854.0,1800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.435629,45.0626039]}},{"type":"Feature","properties":{"resourceCoords":[172.0,1266.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4356982,45.0642072]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p25","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0025","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"211.3,83.6 658.9,76.2 901.5,84.4 981.0,103.2 1100.1,97.1 1226.3,92.4 1314.8,92.8 1567.5,94.0 1627.0,93.5 1627.0,166.3 1561.0,300.6 1606.8,1596.8 1548.8,1890.5 1080.0,1836.5 1021.0,1872.4 900.6,1789.5 671.8,1891.1 243.9,1900.1 242.9,1850.1 161.7,1847.1 169.9,1771.2 169.9,1486.8 166.1,1233.2 167.1,823.1 174.8,82.1 211.3,83.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[167.0,772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4322271,45.0612966]}},{"type":"Feature","properties":{"resourceCoords":[1011.0,772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4305349,45.0623084]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p26","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0026","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.2,1257.3 58.3,1562.0 19.6,1563.2 29.9,1609.0 63.6,1603.2 102.1,1630.9 118.3,1823.7 363.4,1823.5 447.9,1734.7 899.4,1880.7 1627.0,1864.8 1627.0,1815.3 1546.6,1812.4 1554.7,1737.2 1554.4,1455.7 1550.5,1204.5 1551.2,798.6 1558.2,65.0 1511.2,63.1 1006.2,74.0 902.8,73.0 811.5,37.4 768.4,1.0 765.2,1.0 743.0,12.1 681.9,64.5 629.8,74.1 133.5,72.8 134.1,704.5 170.2,1213.3 170.1,1256.6 162.2,1257.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1551.0,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4322271,45.0612966]}},{"type":"Feature","properties":{"resourceCoords":[137.0,748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4350926,45.059586]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0027","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1579.7,311.6 1626.7,1571.8 1581.4,1847.7 1436.1,1895.0 237.9,1880.8 199.2,1926.0 158.8,1926.0 119.5,1926.0 121.8,1190.3 124.2,1143.6 123.0,650.2 128.8,123.1 764.5,126.1 1276.8,92.8 1320.3,93.1 1321.0,101.0 1627.0,207.3 1627.0,247.6 1579.7,311.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[806.0,661.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.43617365921702,45.05893862590736]}},{"type":"Feature","properties":{"resourceCoords":[1375.0,1198.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.43627474678948,45.05748333385877]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p29 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.66"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3954.0"},{"label":"split_canvas_y","value":"5294.0"},{"label":"split_canvas_w","value":"2558.0"},{"label":"split_canvas_h","value":"2414.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1602.5,1420.8 1184.6,1337.2 1082.6,1845.7 996.2,1925.2 1605.2,1925.5 1602.5,1420.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[988.5,1323.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44258949493438,45.05484284941108]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1323.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44122554433758,45.05414917980004]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44214573990139,45.05323341256046]}},{"type":"Feature","properties":{"resourceCoords":[988.5,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44350969049819,45.053927082171505]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p2 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6512.0"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1505.2,1805.3 1505.0,1887.2 1552.9,1889.9 1592.5,1809.3 1577.0,161.6 1398.3,58.1 1181.8,31.8 1180.8,31.6 1180.1,59.0 803.9,163.8 804.7,1.0 758.1,1.0 756.9,29.8 516.8,55.1 441.5,628.4 438.0,634.0 122.5,634.6 71.0,695.7 38.8,1656.9 21.7,1658.8 128.9,1801.9 129.2,1813.0 769.5,1813.2 814.3,1811.9 1505.2,1805.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[138.0,733.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.42322237629693,45.070011145604944]}},{"type":"Feature","properties":{"resourceCoords":[137.0,189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.42213085314549,45.070664503098286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p2 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1752.0"},{"label":"split_canvas_h","value":"2536.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"437.0,413.6 404.8,410.8 402.9,21.5 24.3,24.9 17.8,395.9 63.8,394.4 67.1,556.8 437.0,440.8 437.0,413.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.41990724910994,45.07049914029942]}},{"type":"Feature","properties":{"resourceCoords":[438.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.41918603130044,45.069854639164795]}},{"type":"Feature","properties":{"resourceCoords":[438.0,634.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42049769916198,45.069112139014486]}},{"type":"Feature","properties":{"resourceCoords":[0.0,634.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42121891697148,45.06975664014911]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p3","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0003","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"129.7,1765.7 759.0,1763.0 844.4,1764.5 1483.9,1767.4 1480.9,963.2 1476.4,699.7 1468.1,163.0 1423.6,164.5 786.6,167.4 786.2,156.4 678.9,14.6 112.2,80.1 21.6,1765.2 1.0,1765.2 129.7,1765.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[800.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4275424,45.0674363]}},{"type":"Feature","properties":{"resourceCoords":[124.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4286888,45.0684048]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p4 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"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":"3513.6"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0004","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.8,1926.0 248.6,1812.4 752.8,1790.9 822.3,1707.7 791.4,166.6 781.0,162.4 114.0,181.7 117.7,444.5 118.4,1246.4 126.4,1926.0 139.1,1926.0 153.8,1926.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0004__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":[-83.42514184527151,45.06748698014025]}},{"type":"Feature","properties":{"resourceCoords":[878.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42365412278795,45.06621964096809]}},{"type":"Feature","properties":{"resourceCoords":[878.4,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42756471459204,45.06389718923527]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4290524370756,45.06516452840743]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0005__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p5 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.15"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3410.0"},{"label":"split_canvas_y","value":"3464.0"},{"label":"split_canvas_w","value":"3102.0"},{"label":"split_canvas_h","value":"4244.0"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0005__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0005","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1026.8,1885.1 1133.3,1907.2 1488.5,1895.4 1551.4,1862.6 1597.0,1756.5 1587.3,1472.8 1618.0,1231.2 1578.8,897.6 1321.8,877.2 1059.1,906.1 923.6,1220.9 1026.8,1885.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0005__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1302.2,1476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.45028727240656,45.0669875248978]}},{"type":"Feature","properties":{"resourceCoords":[1072.3,1606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.45117677240293,45.066263614358206]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0007","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1557.0,831.4 1552.1,1599.1 1603.3,1624.5 1533.5,1625.3 1533.8,1684.0 1532.0,1898.2 238.8,1873.2 173.0,1200.0 178.6,1200.0 180.3,934.0 185.8,668.0 185.8,137.8 809.9,141.1 894.5,143.4 1528.7,152.3 1532.1,828.2 1559.4,828.6 1557.0,831.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[854.0,1205.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.43077376060651,45.06549502646559]}},{"type":"Feature","properties":{"resourceCoords":[184.0,133.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.42975722346354,45.06776474175063]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p8","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0008","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.8,610.4 153.7,299.9 147.4,32.0 308.0,30.1 1349.7,26.1 1476.3,26.1 1483.0,548.0 1480.9,809.9 1482.5,1071.8 1477.0,1071.8 1550.3,1733.6 1627.0,1734.1 1627.0,1795.6 1396.1,1838.8 207.9,1779.0 226.4,1724.9 240.3,1725.0 171.1,993.2 154.1,989.9 149.3,934.7 153.8,610.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1483.0,548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4308397,45.0671086]}},{"type":"Feature","properties":{"resourceCoords":[814.0,1074.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4330934,45.0674503]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Michigan | 1895 | sanborn03907_003 p9","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T10:02:36Z","modified":"2026-10-19T10:02:36Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0009","type":"ImageService3","width":1628,"height":1927},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"201.7,1748.7 42.0,1739.1 199.8,581.7 122.2,594.4 144.6,548.6 147.0,56.0 182.8,54.6 306.0,55.7 305.8,47.9 1491.0,54.8 1491.0,56.0 1494.7,327.9 1491.8,642.8 1487.6,819.6 1484.0,971.8 1488.3,1027.8 1505.6,1031.4 1568.6,1774.4 1554.5,1774.2 1535.2,1828.9 1401.4,1820.9 204.9,1826.3 201.7,1748.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[147.0,56.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4343949,45.0716386]}},{"type":"Feature","properties":{"resourceCoords":[1491.0,56.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4320756,45.0697049]}}]}}]}