US Geological Survey

US Geological Survey

Cook Inlet Basin Study Unit – Glaciers

nawqa_glac1 is a polygon coverage of glaciers in the Cook Inlet National Water-Quality Assessment (NAWQA) study unit. The Cook Inlet NAWQA is located in southcentral Alaska and the coverage was created from 1:2,000,000 digital line graphs (DLGs). The purpose of nawqa_glac1 is to give a general overview of the amount of glaciers present in the Cook Inlet Basin. Because glaciers play an important part in the hydrology of rivers and streams, their absence or presence will be a critical factor in the selection of water-quality sampling sites for the Cook Inlet NAWQA.

The glacier coverage was created by USGS and Alaska Division of Natural Resources (ADNR) personnel using the USGS 1:2,000,000 digital line graphs (DLG) and techniques described by Domaratz and others (1982). Polygons representing glaciers were assigned a value of 40 to the item MAJ in the polygon attribute table. The drainage basin boundaries of the Cook Inlet Basin, developed from 1:250,000 quadrangle maps, were used as the boundaries of the coverage.

Data and Resources

  • Download
    Glaciers Coverage


  • View website
    Website :: National Water Quality Assessment (NAWQA)—Cook Inlet Basin Study Unit

  • View metadata
    Metadata :: Glaciers in the Cook Inlet Basin - National Water-Quality Assessment Program

Status: Complete
Type: Data
End Date: 1997/06/20
Data Types: GIS
  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2016-10-28 16:59:56 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2016-10-28 16:59:49 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    Updated by Trail
    2015-07-18 17:44:29 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    Updated by Trail
    2015-07-18 01:22:49 -0800
  • Ee0a0a4e02f5cfa5b34a4bcad3d24f20
    New record created
    2015-07-13 22:54:10 -0800