Filters: Tags: Glaciers (X) > Extensions: Shapefile (X)

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Maximum glacial extent of the named glaciers in Glacier National Park during the peak of the Little Ice Age 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... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CCME-glacier, Flathead National Forest, Glacier National Park, Montana, aerial imagery, All tags... alpine glacier, cryosphere, environment, geoscientificInformation, glacier area, glacier retreat, glaciers, moraine, satellite imagery, snow and ice cover, Fewer tags A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age 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... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: CCME-glacier, Flathead National Forest, Glacier National Park, Montana, aerial imagery, All tags... alpine glacier, cryosphere, environment, geoscientificInformation, glacier area, glacier retreat, glaciers, moraine, satellite imagery, snow and ice cover, Fewer tags