J. Joseph Giersch 20200427 vector digital data Reston, VA U.S. Geological Survey https://doi.org/10.5066/P9RCMMKL To determine minimum coverage of perennial snow and ice cover for Glacier National Park, the minimum extent of glaciers and multi-year snow features were digitized from satellite imagery (10-meter NAPP 2003, NAIP 2005, and NAIP 2013, and 30-cm resolution, multispectral, pansharpened Digital Globe WorldView satellite imagery collected in late summer and fall 2015). Features were digitized in ArcGIS version 10.2 using a Wacom Intuos 4 digitizing tablet. Snow and ice features were classified as glacier, large ice mass, or perennial snow/ice. Glaciers were based on current, named glaciers. Remnant ice features not large enough to be classified as glaciers, but showing evidence of crevasses, were classified as large ice masses. Any other snow features present during driest years (mostly 2003), were classified as permanent snow. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Minimum perennial now and ice coverage for Glacier National Park was digitized to calculate snow and ice coverage of aquatic macroinvertebrate sample collection locations. Analysis will be used to investigate the effect of ice and snow coverage on aquatic macroinvertebrate communities. 2003 2015 ground condition Complete None planned -114.2525 -113.3047 49.0219 48.2691 Glacier National Park, Montana ISO 19115 Topic Category biota USGS Thesaurus remote sensing land use change None cryosphere glacier snow geospatial USGS Metadata Identifier USGS:5e6925fae4b01d50925cff3c Geographic Names Information System (GNIS) Glacier National Park Common geographic areas Montana None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Jonathan J Giersch U.S. Geological Survey Aquatic Entomologist mailing address

38 Mather Dr

West Glacier MT 59936 USA 406-404-4246 406-888-5835 jgiersch@usgs.gov No formal accuracy tests were conducted. No formal logical accuracy tests were conducted. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Download best available 2015 satellite imagery from USGS Earth Explorer (https://earthexplorer.usgs.gov) or DigitalGlobe EV web hosting website (https://evwhs.digitalglobe.com/myDigitalGlobe). Best imagery was selected by choosing the image with the least seasonal snow to best reveal glacier margins and perennial snow coverage. Export image as GeoTiff. 20170501 Import selected satellite image in to ArcGIS. Visually determine main body portion and digitize margin at 1:1000 scale with Wacom Pro digital tablet. Where heavy shading, image distortion, or image quality was compromised in some way, supplemental imagery from another date to best determine minimal snow/ice margin. File attributes list specific photos used in analysis. 20170501 Snow and ice features were classified as glacier, large ice mass, or permanent snow. Glaciers were based on current, named glaciers. Remnant ice features not large enough to be classified as glaciers, but showing evidence of crevasses, were classified as large ice masses. Any other snow features present during driest years (mostly 2003), were classified as perennial snow/ice. 20171201 Vector G-polygon 2938 Universal Transverse Mercator 12 0.9996 -111.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS_1980 6378137.0 298.257222101 Minimum_snow_and_ice_coverage_for_GNP,_2003-2015.shp Attribute Table Table containing attribute information associated with the data set. Producer Defined FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. DESC_ Glacier name if a glacial feature Producer Defined NA Not Applicable Producer defined Glacier name if a glacial feature Area_m Area of the snow/ice feature in square meters Producer Defined 9.18213281407 1602265.97165 Type3 Type of snow/ice of each feature Producer Defined perennial snow/ice Perennial snow/ice features visible in dry-year imagery. Producer defined large ice mass Remnant ice features, formerly connected to glaciers, in which evidence of crevasses are visible. Producer defined glacier Main body of named glaciers. Producer defined Imagery Primary image used to delineate and digitize snow or ice feature margin Producer Defined NAPP 2003 National Aerial Photography Program (NAPP) from September, 2003, and orthorectified. 2003 was one of the driest years on recent record, and a year during which major fires were active throughout Glacier National Park. Producer defined Worldview-1 20150822 WorldView-1 satellite imagery captured 22 August, 2015 Producer defined NAIP 2005 National Agriculture Imagery Program (NAIP) captured August, 2005. Producer defined Worldview-1 20150912 WorldView-1 satellite imagery captured 12 September, 2015 Producer defined Worldview-1 20150925 WorldView-1 satellite imagery captured 25 September, 2015 Producer defined NAIP 2013 National Agriculture Imagery Program (NAIP) captured October, 2013. Producer defined NAPP 1998 National Aerial Photography Program (NAPP) captured September, 1998. Orthorectified by the producer. Producer defined GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P9RCMMKL None 20200826 Jonathan J Giersch U.S. Geological Survey Aquatic Entomologist mailing address

38 Mather Dr

West Glacier MT 59936 USA 406-404-4246 406-888-5835 jgiersch@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999