{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08422_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Bay City, Texas | 1917 | mapsnap generated fit (2026-10-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-22"},{"label":"run","value":"corpus-v2.1"},{"label":"pages","value":"7"},{"label":"placed","value":"6"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef-snap 3, georef 2, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"1 sheet(s) cut into 1 panels"},{"label":"unplaced pages","value":"p4 (tier 1, 28.98262,-95.96693 +/-260m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000010__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p1 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.04"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4936.0"},{"label":"split_canvas_y","value":"5986.0"},{"label":"split_canvas_w","value":"3684.0"},{"label":"split_canvas_h","value":"4258.0"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000010__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000010","type":"ImageService3","width":2155,"height":2561},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1270.0,1552.4 1261.3,2496.7 2104.7,2520.8 2096.1,1553.7 2008.1,1553.9 1672.0,1609.8 1509.6,1513.4 1270.0,1552.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000010__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1383.0,1555.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.9702577,28.9882285]}},{"type":"Feature","properties":{"resourceCoords":[1383.0,2280.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.9702229,28.9871625]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.42"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000020","type":"ImageService3","width":2159,"height":2561},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"352.2,127.3 1862.1,133.6 1921.5,217.0 2046.8,217.1 2047.0,577.9 2052.5,1065.0 2049.8,1302.0 2054.1,1753.0 2050.8,2512.2 1292.0,2517.1 515.9,2508.3 187.2,2508.1 151.7,1756.3 162.3,1756.3 155.3,980.8 131.9,980.7 131.6,211.1 343.6,215.0 352.2,127.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.97092738825266,28.98434702916676]}},{"type":"Feature","properties":{"resourceCoords":[2159.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.96745713172608,28.984436071894674]}},{"type":"Feature","properties":{"resourceCoords":[2159.0,2561.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.96733723429509,28.980809769382734]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2561.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-95.97080749082167,28.980720726654823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.87"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000030","type":"ImageService3","width":2170,"height":2576},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.3,71.2 1496.5,38.0 1658.3,117.5 1784.2,52.5 2147.8,125.9 2149.9,1.1 2169.0,90.9 2169.0,138.9 2169.0,214.9 1956.8,213.6 1966.2,989.1 1989.6,988.9 2005.9,1770.3 1995.2,1770.5 2039.7,2527.7 1585.3,2532.8 1198.0,2550.9 844.8,2560.4 85.4,2570.2 85.2,2470.1 62.5,2470.3 75.3,71.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1581.0,265.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.97130827383921,28.983972161534073]}},{"type":"Feature","properties":{"resourceCoords":[831.0,2524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.9724510011941,28.98077938354475]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.75"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000050","type":"ImageService3","width":2170,"height":2568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2029.8,2494.4 1945.2,2553.3 1945.3,2537.9 1054.9,2437.3 676.1,2538.5 72.3,2487.1 6.7,898.2 75.5,83.5 1875.0,45.0 2047.8,116.1 2042.8,694.5 2045.1,1154.0 2033.0,1992.4 2031.0,2368.9 2029.8,2494.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000050/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2011.0,2379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.96764462718791,28.984151475369014]}},{"type":"Feature","properties":{"resourceCoords":[557.0,110.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.96409260673276,28.986310334734622]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p6","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000060/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000060","type":"ImageService3","width":2174,"height":2563},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.3,813.0 110.7,581.7 112.3,460.1 110.0,210.3 110.3,25.2 301.8,25.1 728.0,28.6 961.6,25.9 1255.7,26.7 1254.2,30.4 2122.5,81.8 2136.9,2129.9 2090.9,2509.6 169.4,2537.8 156.6,2562.0 110.7,2434.7 110.9,2337.2 125.0,1960.2 130.1,1631.2 109.6,1577.3 109.7,1202.5 112.3,813.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000060/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1240.0,414.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.9640244,28.983148]}},{"type":"Feature","properties":{"resourceCoords":[1240.0,1959.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.9638726,28.9788832]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Bay City, Texas | 1917 | sanborn08422_003 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-22T13:44:31Z","modified":"2026-10-22T13:44:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000070","type":"ImageService3","width":2180,"height":2576},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"172.6,1.0 161.0,1.0 160.8,19.7 62.0,61.2 40.2,148.6 49.2,2489.3 96.9,2534.5 2070.4,2560.2 2140.6,2488.7 2141.2,2442.9 2165.0,2428.7 2173.8,2442.8 2179.0,1952.1 2179.0,1417.1 2124.4,1268.0 2124.0,1170.6 2135.9,793.5 2139.1,464.4 2118.3,410.7 2116.3,35.9 1729.8,39.9 1334.5,37.0 935.8,38.2 738.5,45.8 558.8,49.1 172.2,51.0 172.6,1.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034bm:g08422003:sb000070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2104.0,424.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.96752122069574,28.979801934046577]}},{"type":"Feature","properties":{"resourceCoords":[2104.0,1926.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.96740089624016,28.975655207063117]}}]}}]}