GIS Programs by Doyle's GIS

The next 3 are the ones I use the most and have had the best luck with:

The following is a list of some programs / software you will need to use the GIS files.  Most are free or low cost.  For GPS software Click Here.
 
3DEM - 3D viewer for DEMs
ArcExplorer - Free ver. of ArcView
ERDAS ViewFinder 2.1 - Erdas Viewfinder will create a real geotiff file, with full geotiff georeferencing info.
Free DWG Viewer - A free viewer for AutoCAD files.
 
GratIS - Free Software program that allows you to view and work on some of these files.  I've played with a little and it looks good but will take some learning.
MrSID Viewer - Viewer for MrSID files
 

PowerArchiver - This is another program that supports several file types that WinZip does not.  Supports ZIP, CAB, LHA (LZH), TAR, TAR.GZ, TAR.BZ2, BH, RAR, ARJ, ARC, ACE, ZOO, GZ, BZIP2, XXE, and UUE file formats.  Very nice program and cheaper than WinZip

TNRIS GIS Tools - A web page with several links to web pages with GIS tools.

Volo View Express - Allows you to View, Print, and Markup AutoCAD files.  Not as good as it used to be.  Also see the Free DWG Viewer above.
WinZip - This is a very common program used to compress files and most of the downloads will be in this format.

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Keywords: Programs to view GIS files, GIS software, GIS viewers, DRG viewer,