The GIS Data Depotä and GeoCommunityä use common compression and archival programs. We use GZIP and WINZIP compression utilities on all datasets. This allows for faster download speed and additional data to be written to each CD.
In addition, compression significantly increases storage capacity. Decompression utilities are available from a variety of free sources on the Internet, as well as links from our web site. These formats make it easy for both Win95/NT and UNIX users to extract and decompress files found on the GeoCommunityä web-site.
We will only provide those programs that are public domain and/or shareware. All other compression and archival programs will be at the users discretion to download and register.
The following compression and archival formats can be found at the GIS Data Depotä.
- .TAR - Tape Archive format.
- .ZIP - ZIP Archive Compression format.
- .GZ - GNU ZIP Compression format.
Also be sure to visit the GeoCommunity
Software section to access loads of free utilities including data viewers, translators, and user scripts.