{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03907_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alpena, Michigan | 1895 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"44"},{"label":"placed","value":"27"},{"label":"unplaced","value":"17"},{"label":"fit sources","value":"georef 20, georef-snap 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"8 sheet(s) cut into 23 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 45.06542,-83.42772 +/-257m); p10__2 (tier 1, 45.07321,-83.43580 +/-100m); p11__1 (tier 3, 45.07493,-83.43664 +/-548m); p11__2 (tier 3, 45.07493,-83.43664 +/-548m); p12__2 (tier 1, 45.05352,-83.44130 +/-100m); p12__3 (tier 3, 45.07072,-83.44384 +/-2001m); p12__4 (tier 1, 45.07848,-83.44155 +/-100m); p12__5 (tier 3, 45.07072,-83.44384 +/-2001m); p28__1 (tier 2, 45.06036,-83.42935 +/-100m); p28__2 (tier 1, 45.06019,-83.43141 +/-100m); p28__3 (tier 1, 45.05994,-83.43123 +/-100m); p4__2 (tier 1, 45.06668,-83.42573 +/-128m); p4__3 (tier 1, 45.06645,-83.42637 +/-133m); p5__1 (tier 1, 45.06551,-83.45037 +/-217m); p5__3 (tier 1, 45.06642,-83.42297 +/-100m); p5__4 (tier 2, 45.06872,-83.43947 +/-100m); p6 (tier 1, 45.06376,-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":"3"},{"label":"intersections","value":"2"},{"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":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"838.9,1789.9 1323.0,1770.0 1330.6,1927.0 1628.0,1927.0 1628.0,239.9 1628.0,0.0 1086.7,0.0 1085.9,440.8 485.7,443.3 481.1,0.0 -0.0,0.0 -0.0,1284.3 183.0,1377.0 195.8,1677.2 628.3,1657.3 838.9,1789.9\" /></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":[-83.4355345,45.0710181]}},{"type":"Feature","properties":{"resourceCoords":[1323.0,1770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4343949,45.0716386]}}]}},{"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":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3344.4"},{"label":"split_canvas_h","value":"3928.8"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"822.8,0.0 0.0,0.0 0.0,982.2 715.9,982.2 836.1,982.2 833.2,778.0 822.8,0.0\" /></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":[-83.45006559953023,45.07434200129734]}},{"type":"Feature","properties":{"resourceCoords":[836.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44861463365262,45.07551464073983]}},{"type":"Feature","properties":{"resourceCoords":[836.1,982.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44666484149612,45.074310592744915]}},{"type":"Feature","properties":{"resourceCoords":[0.0,982.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44811580737372,45.07313795330242]}},{"type":"Feature","properties":{"resourceCoords":[543.1,763.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4476081,45.0741688]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"-0.0,1805.0 0.0,0.0 1628.0,0.0 1628.0,1927.0 1518.4,1927.0 1519.0,1811.0 -0.0,1805.0\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"305.7,179.3 306.4,69.1 -0.0,67.1 -0.0,-0.0 1424.2,-0.0 1422.1,190.8 1547.7,193.8 1576.7,1280.0 1628.0,1280.3 1628.0,1927.0 -0.0,1927.0 -0.0,1705.3 167.9,1706.4 189.0,178.0 305.7,179.3\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1515.8,1812.1 166.6,1818.3 125.5,733.2 -0.0,731.5 -0.0,145.7 938.9,185.9 1043.2,-0.0 1355.5,-0.0 1380.8,1119.6 1347.8,1119.3 1514.1,1151.7 1515.8,1812.1\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"-0.0,1927.0 -0.0,742.8 192.6,741.5 188.2,92.4 1492.0,92.0 1489.8,1927.0 -0.0,1927.0\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1522.1,1927.0 -0.0,1927.0 -0.0,1373.6 137.6,1373.1 134.8,78.9 1509.9,72.7 1522.1,1927.0\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"134.9,659.1 108.6,617.8 -0.0,608.9 0.0,-0.0 1314.3,-0.0 1345.1,1812.1 143.4,1826.1 134.9,659.1\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1518.9,1788.5 -0.0,1794.6 0.0,0.0 1628.0,-0.0 1628.0,868.6 1510.0,869.0 1518.9,1788.5\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1559.2,1866.3 1507.6,1927.0 832.2,1927.0 832.6,1756.0 146.6,1759.5 138.8,142.7 1519.4,147.0 1531.2,1801.0 1559.2,1866.3\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"-0.0,1927.0 -0.0,433.8 136.1,434.3 136.1,201.5 815.5,199.5 813.5,369.0 1482.4,370.5 1628.0,510.1 1628.0,756.7 1494.5,933.7 1486.9,1635.3 1628.0,1637.5 1628.0,1927.0 -0.0,1927.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44211357581295,45.064018769600274]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43934045835182,45.0617109504482]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44318069969522,45.05937606193874]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44595381715635,45.061683881090815]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"288.5,1927.0 288.4,1872.3 146.7,1870.5 157.5,1140.7 285.4,989.6 286.3,740.2 132.1,609.2 664.3,-0.0 837.0,-0.0 842.5,262.1 1521.5,265.1 1516.2,1547.5 1628.0,1547.3 1628.0,1927.0 288.5,1927.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43937044718061,45.06238880049252]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43661508533366,45.060087054046065]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44044511227763,45.05776704904621]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44320047412458,45.06006879549267]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"840.1,1539.6 827.3,1281.8 668.6,1280.7 198.2,1808.0 171.4,1779.4 183.6,125.2 1531.3,156.2 1514.4,312.0 1447.5,401.5 1526.1,531.1 1507.6,1547.3 840.1,1539.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4368300845941,45.063984116301626]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43400384798676,45.06165710093618]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43787602872305,45.059277485505305]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4407022653304,45.06160450087075]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1548.7,1811.2 177.6,1799.2 168.3,873.7 287.1,873.3 286.9,-0.0 1537.3,-0.0 1548.7,1811.2\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"161.7,1847.1 174.8,82.1 1628.0,93.5 1628.0,1927.0 -0.0,1927.0 -0.0,1838.2 161.7,1847.1\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"133.5,72.8 654.5,71.6 753.5,0.0 902.8,73.0 1558.2,65.0 1546.6,1812.4 1386.5,1803.7 1386.6,1891.6 1628.0,1891.4 1628.0,1927.0 -0.0,1927.0 -0.0,1270.6 170.0,1256.6 133.5,72.8\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"131.6,125.5 1322.5,90.7 1335.1,261.9 1628.0,262.4 1628.0,1927.0 117.2,1927.0 131.6,125.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43623011712597,45.06088756684603]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4334521972953,45.05857385506422]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43730203196525,45.0562347942406]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44007995179592,45.05854850602241]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__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 p29 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"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":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__1/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=\"-0.0,-0.0 -0.0,1927.0 987.0,1927.0 1178.0,1321.9 1628.0,1321.7 1628.0,0.0 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0029__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":[-83.45590601614512,45.0637726156933]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.45220272363511,45.06223811475161]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.45477378879994,45.05914143196437]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.45847708130995,45.060675932906065]}},{"type":"Feature","properties":{"resourceCoords":[953.0,167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.453962,45.0626055]}}]}},{"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":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3948.0"},{"label":"split_canvas_y","value":"5286.8"},{"label":"split_canvas_w","value":"2564.0"},{"label":"split_canvas_h","value":"2421.2"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1628.0,1927.0 1628.0,1321.7 1178.0,1321.9 987.0,1927.0 1628.0,1927.0\" /></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":[987.0,1321.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44324027401098,45.05548889159865]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1321.7],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44021937833291,45.05441649637152]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44165449787356,45.05239891196948]}},{"type":"Feature","properties":{"resourceCoords":[987.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.44467539355162,45.05347130719661]}},{"type":"Feature","properties":{"resourceCoords":[1291.0,1568.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4423932,45.0541588]}}]}},{"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":"3"},{"label":"intersections","value":"2"},{"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":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"828.6,1834.0 828.9,1927.0 1628.0,1927.0 1628.0,-0.0 1225.3,-0.0 1218.2,205.8 835.7,201.0 838.9,-0.0 437.1,0.0 436.1,630.9 0.0,634.2 -0.0,1654.0 132.1,1656.1 131.1,1827.4 828.6,1834.0\" /></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":[-83.4232568,45.0700254]}},{"type":"Feature","properties":{"resourceCoords":[137.0,189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4221931,45.070674]}}]}},{"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":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1748.4"},{"label":"split_canvas_h","value":"2536.8"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"-0.0,0.0 -0.0,403.2 63.5,400.6 67.2,595.3 436.2,584.7 437.1,0.0 -0.0,0.0\" /></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":[-83.41991291954409,45.070497576805224]}},{"type":"Feature","properties":{"resourceCoords":[437.1,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.41918732243617,45.0698518515685]}},{"type":"Feature","properties":{"resourceCoords":[437.1,634.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42050448877981,45.069103133489506]}},{"type":"Feature","properties":{"resourceCoords":[0.0,634.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42123008588773,45.06974885872623]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1483.9,1767.4 -0.0,1765.5 -0.0,0.0 784.9,-0.0 786.6,167.4 1468.1,163.0 1469.8,253.8 1628.0,251.3 1628.0,517.6 1473.2,517.0 1483.9,1767.4\" /></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":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3521.6"},{"label":"split_canvas_h","value":"7708.0"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"125.7,1927.0 135.0,1927.0 349.0,1927.0 880.4,1927.0 869.3,950.5 858.4,0.0 111.2,-0.0 125.7,1927.0\" /></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":[-83.42514087106304,45.06748739973429]}},{"type":"Feature","properties":{"resourceCoords":[880.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42364844197735,45.06621681553301]}},{"type":"Feature","properties":{"resourceCoords":[880.4,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4275601364082,45.06389231142231]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42905256549389,45.06516289562359]}}]}},{"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":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"3575.2"},{"label":"split_canvas_y","value":"3456.4"},{"label":"split_canvas_w","value":"2936.8"},{"label":"split_canvas_h","value":"4251.6"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1628.0,1927.0 1628.0,864.1 1064.7,865.8 893.8,1246.4 908.6,1345.9 987.8,1927.0 1628.0,1927.0\" /></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":[1302.3,1476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4502933,45.0670639]}},{"type":"Feature","properties":{"resourceCoords":[1072.6,1606.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-83.4513484,45.0664306]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1529.7,1822.0 316.9,1813.4 326.2,1203.3 178.2,1202.9 188.7,140.1 1530.6,149.2 1532.0,827.0 1628.0,827.9 1628.0,1621.8 1531.0,1621.9 1529.7,1822.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd411m:g4114m:g4114am:g039071895:03907_1895-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.4298052941972,45.06819928798478]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.42700112147017,45.06585655623008]}},{"type":"Feature","properties":{"resourceCoords":[1628.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43089974105816,45.06349569156007]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1927.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-83.43370391378518,45.06583842331477]}}]}},{"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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"1628.0,1070.9 1628.0,1670.9 26.6,1672.3 27.0,1927.0 -0.0,1927.0 -0.0,557.4 155.0,556.2 148.1,31.5 -0.0,33.7 -0.0,0.0 1349.9,-0.0 1350.0,23.5 1476.6,26.3 1482.3,1071.6 1628.0,1070.9\" /></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"}],"created":"2026-09-23T19:42:35Z","modified":"2026-09-23T19:42:35Z","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=\"144.6,548.7 147.0,56.0 306.9,55.6 309.4,-0.0 1628.0,-0.0 1628.0,25.3 1341.0,22.6 1340.7,56.9 1491.0,56.0 1493.1,588.5 1335.8,588.2 1325.4,1703.3 26.9,1690.8 24.6,1927.0 -0.0,1927.0 -0.0,756.5 144.6,548.7\" /></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]}}]}}]}