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Input Data

The aim of the present case study is to use old USGS topographic maps in conjunction with more recent aerial photos and satellite images to determine the change in terminus location of the Mendenhall glacier and monitor the retreat of this glacier over time. The specific datasets used in this case study include the following.

tab_left USGS topographic map from 1986 tab_right

tab_left Landsat image from 2000 tab_right

A Landsat-7 Enhanced Thematic Mapper (ETM+) image is part of the freely downloadable Alaska View Chapter. The scene including the study area is WRS-2 path 57, row 19. Scene 7057019000015450 was acquired June 2, 2000. It is only three percent covered by cloud (unusual for southeastern Alaska) and has an image quality of nine. The 30-m spatial resolution multi-spectral bands and the 15-m resolution panchromatic data were used in this study. The Landsat image has already been geometrically and radiometrically corrected. It is projected in UTM coordinates, zone 8, in the NAD27 datum.

tab_left Aerial photo mosaic from 2005 tab_right

logos Geophysical Institute University of Alaska Fairbanks Alaska Space Grant Program