The Glacial Chronosequence at
Glacier Bay National Park 1700-Present

The GLBA_ICE coverage is a representation of past and present glaciation within the boundaries of Glacier Bay National Park and Preserve. It depicts the more significant movements of ice throughout various stages of time since the maximum extent of the neo-glacial ("Little Ice Age") advance.

The purpose of this coverage was to analyze the historic movement of ice and to identify the present regions of glaciation in Glacier Bay National Park and Preserve through the compilation and synthesis of various data sources/formats.

Data for this coverage were collected from varying sources including records from ecological studies and trimline surveys, historic maps and archived information, USGS topographic maps, nautical charts, and TM satellite images. Polygon shapefiles were digitized on to various Park GIS theme layers (including elevation grids/contours, Park boundary lines, NOAA coastline, scanned topographic maps and satellite imagery) using ArcView 3.0 and converted to ARCINFO NT 7.1.1 coverages. Polygon and Region topology was built, attribute information added, and citations compiled in dbase format.
Philip N. Hooge

Elizabeth K. Solomon

Glacier Bay Field Station

September 15, 1997
Last Reviewed: