	Mctg.USGS reads the USGS standard ascii COMPOSITE THEME GRID file which
contains the following grid cell information:

	1.  Land Use and Land Cover
	2.  Political Unit Map
	3.  Census County Subdivision Map 
	4.  Hydrologic Unit Map
	5.  Federal Land Ownership Map
	6.  State Land ZOwnership Map

	The COMPOSITE THEME GRID file contains all of the window information for
the grid cell files including: resolution, grid zone, and NE coordinates.  The 
command Mctg.USGS will create the grid cell and place them in the current mapset.
