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These polygon features represent the maximum extent of the 37 named glaciers in Glacier National Park and two glaciers on U.S. Forest Service’s Flathead National Forest land during the peak of the Little Ice Age (mid-nineteenth century). Glacial margins are based on moraine deposits that result from active glaciation, and do not depict perennial snow and ice. Moraines were digitized based on WorldView imagery acquired on the following dates: 20141019, 20150822, 20150912, 20150925, 20160821, 20160915 (World View 01 and World View 03 satellites). High resolution imagery was supplemented with oblique aerial photographs flown in 2009 and 2016, historic photographs from the USGS photograph collection, and field notes...
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These polygon features represent digitization of the glacier margins for the 37 named glaciers of Glacier National Park (GNP) and two glaciers on U.S. Forest Service’s Flathead National Forest land, derived from 2015 satellite imagery. The polygons represent only the main body portion of each glacier as it appeared in 2015 satellite imagery. Disconnected patches are not included as this dataset represents only the main body features of the named glaciers in GNP and environs. Polygons were digitized from WorldView imagery acquired on the following source dates: 20150822, 20150912, 20150915, 20150925 (World View 01 satellite). Initial digitization was completed by Melissa Brett, PSU graduate student. This set of polygons...
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USGS Public Affairs Office release information: Mount St. Helens from Space, Before and After. False color Landsat satellite images of Washington state's Mount St. Helens volcano taken before (left - September 11, 1979) and after (right - August 19, 1980) the cataclysmic eruption of May 18, 1980, clearly show some of the damage and surface effects of the eruption, according to the U.S. Geological Survey. In these false color images, healthy vegetation appears red and sediment-free streams or lakes appear very dark blue. In the "before" image, Mount St. Helens is the white, snow-capped feature near the center of the image. Spirit Lake is the "U"-shaped dark blue water body just north of the volcano, Swift Reservoir...
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Album caption: MSH-Branch of Exhibits no. 29cp: Satellite imagery showing parts of the Copper River, Southwestern Alaska and Aleutian regions. The following peaks and volcanoes are identified: Iliamma, Augustine, Douglas, Fourpeaked, Kaguyak, Devils Desk, Kukak, Stellar, Denison, Snow, Mt. Griggs (Knife Peak), Novarupta, Mageik, Trident, Martin, Peulik (Ugashik Caldera), Kialagvik, Chiginigak, Anikchak, Black (Purple), Veniaminof, Kupreanof, Dana, Pavlof Sister, Pavlof, Double Crater, Hague, Emmons, Amak, Dutton, Frosty, Walrus (Morzhovoi), Roundtop, Isanotski, Shishaldin, Fisher, Westdahl, Pogramni, Mt. Gilbert (Akun), and Akutan. Copper River, Southwestern Alaska, and Aleutian regions, Alaska. n.d. (Same as USGS...
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Album caption and index card: Black and white print of color Landsat image showing the extent of the flood plain in the Apalachicola River Basin, The dark color of the flood plain is caused by the low reflectance from flood waters. The 200-m wide river is barely visible in the center of the 3.2 to 8.0 -km-wide flood plain. The Apalachicola River flows from Lake Seminole (at the top), 171 km south, to Apalachicola Bay (near bottom of the scene). The numerous white squares near the large red area east of the river is pine forest (Apalachicola National Forest). The faint brown color on the birdsfoot delta at the river mouth is marsh. The light blue colors near the beaches at the bottom of the scene are a combination...
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These polygon features represent the maximum extent of glaciers in Glacier National Park and two glaciers on U.S. Forest Service’s Flathead National Forest land during the peak of the Little Ice Age (mid-nineteenth century). Glacial margins are based on moraine deposits that result from active glaciation, and do not depict perennial snow and ice. The criteria used for determining which moraines constituted a former glacier were a) whether a terminal moraine was present, and b) whether the glacier area was five aces or more. Moraines were digitized based on the best available imagery, including WorldView imagery acquired between 2015 and 2017, border Imagery from the Department of Homeland Security acquired in 2009...
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Conclusions: Seismic cutline proportion did not explain landscape use by grizzly bears, but secondary effects of cutlines on landscape structure did. Declining use was mainly associated with increasing proportions of closed forest, and increasing variation of inter-patch distances, while use was mainly increasing with increasing mean patch size. Thresholds/Learnings: Bears appear to use areas more when landscape patches tend to be larger, and mean patch size is generally reduced with additional seismic cutlines. Also, bears appear to use areas more when landscape patches are consistently spaced, and the spacing between landscape patches becomes more variable with additional seismic cutlines. Synopsis: This study...
    map background search result map search result map Seismic cutlines, changing landscape metrics, and grizzly bear landscape use in Alberta 2015_Glacier margins derived from 2015 satellite imagery for the named glaciers of Glacier National Park, MT and environs A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age Maximum glacial extent of the named glaciers in Glacier National Park during the peak of the Little Ice Age Landsat image showing the extent of the flood plain. Apalachicola River Basin. Florida. 1977. Mount St. Helens from space, before and after the eruption. Skamania County, Washington. 1979 and 1980. Satellite imagery showing parts of the Copper River, Southwestern Alaska and Aleutian regions. Alaska. n.d. 2015_Glacier margins derived from 2015 satellite imagery for the named glaciers of Glacier National Park, MT and environs Maximum glacial extent of the named glaciers in Glacier National Park during the peak of the Little Ice Age Mount St. Helens from space, before and after the eruption. Skamania County, Washington. 1979 and 1980. A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age Seismic cutlines, changing landscape metrics, and grizzly bear landscape use in Alberta Landsat image showing the extent of the flood plain. Apalachicola River Basin. Florida. 1977. Satellite imagery showing parts of the Copper River, Southwestern Alaska and Aleutian regions. Alaska. n.d.