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A comprehensive inventory of maximum glacial extent in Glacier National Park during the peak of the Little Ice Age

Metadata Updated: October 29, 2023

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 and GoogleEarth imagery. High resolution imagery was supplemented with oblique aerial photographs flown in 2009 and 2016, historic photographs from the USGS photograph collection, and field notes from a 1914 USGS survey. Digitization was completed by Chelsea Martin-Mikle (USGS) and local knowledge and interpretation were provided by Dan Fagre and Lisa McKeon (USGS) in February, 2017 – February, 2018. Glacier margins were digitized at 1:2000 scale.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:5b194ca2e4b092d965237f4a
Data Last Modified 20200831
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 9b187261-50c0-41c1-9278-300f6a247592
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -114.2486,48.3084,-113.3643,49.0226
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 471331196b0780f7aaf0aeeaa61e26bc56ce9577ff35281e2de15d63a69bdf86
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -114.2486, 48.3084, -114.2486, 49.0226, -113.3643, 49.0226, -113.3643, 48.3084, -114.2486, 48.3084}

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