Many of the products available from this site are compressed and archived in the UNIX GZIP and TAR formats. Software to uncompress and extract files in these formats are readily available for UNIX platforms (if your UNIX distribution doesn't include these utilities, you can download sources for them from the GNU FTP Mirror List). Users of Windows and Macintosh computers can access these files using freeware or shareware translation/extraction software. Links to non-government software sites are provided here as a service and do not constitute endorsement of the sites by USGS or the U.S. Government.
Find/Download shareware/freeware TAR utilities
To extract .tar and .tar.gz files on
Windows 9x/NT/2000/ME/XP use
PowerArchiver 6.1 (freeware) or
7-zip (freeware) or
Winzip (commercial).
Find/Download shareware/freeware GZIP utilities from gzip (GNU zip).
The URL for this page is: https://pubs.usgs.gov/imap/i1509a/software.html
Please send comments and suggestions to Mike Diggles
Updated: June 23, 2005, (mfd)