Top of this page

Photogrammetric Data Set, 1957-2000 and Bathymetric Measurements for Columbia Glacier, Alaska

by Robert M. Krimmel

U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 01-4089

ABSTRACT

Major changes in the length, speed, surface altitude, and calving rate of Columbia Glacier, Alaska have been recorded with stereo vertical photography acquired on 119 dates from 1957 to 2000. Photogrammetric analysis of this photographic record has resulted in precise measurement of these changes. From 1982 to 2000 Columbia Glacier retreated 12 kilometers, reduced its thickness by as much as 400 meters, increased its speed from about 5 to 30 meters per day, and increased its calving rate from 3 to 18 million cubic meters per day. All photogrammetric data for Columbia Glacier from 1957 to 2000 are included in this report, as well as supplemental data of ice-dammed lake surface levels, stagnant ice ablation rate, forebay bathymetry, ground control, and camera calibrations. These data are contained in 481 files, all preserved on a CD-ROM included with this report.

CONTENTS

Abstract
Introduction
Data Acquired
Data Files and Storage
Other Sources for These Data Types
Conclusions References

Krimmel, R.M., 2001, Photogrammetric Data Set, 1957-2000 and Bathymetric Measurements for Columbia Glacier, Alaska: U.S. Geological Survey Water-Resources Investigations Report 01-4089, 46 p.

Full Report, Acrobat PDF (2.3 MB) 

Data files from report CD in zip format (76 MB) (Suggested to read report first to be sure you want these; contains 513 files, mostly text or examine CD readme file.)

Adobe Acrobat's .pdf (portable document file) format can be viewed using the free Adobe Acrobat Reader available for DOS, Windows, Macintosh, and UNIX. This link will allow you to get the free download and installation instructions from Adobe.

Document Accessibility: Adobe Systems Incorporated has information about PDF and the visually challenged. This information provides tools to help make PDF files accessible to the visually disabled. These tools convert Adobe PDF documents into HTML or ASCII text, which can then be read by a number of common screen reading programs that synthesize text as audible speech. In addition an accessible version of Acrobat Reader for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free of charge from Adobe at URL: < http://access.adobe.com/>