This module allows users to draw the United States map with state
boundary and county boundary. With the distribution of the module, two map
data files are also included.  

	allcounty.txt:	ASCII data for boundaries of ALL counties in
			the United States, including Alaska, Hawaii and
			Perto Rico.

	countryd.txt:	ASCII data for boundaries of the states.

	Users may construct their own boundary map according to the format.
For example, the boundary of a unit square area can be constructed as the
following:

	"00001",5
	-1.0,-1.0
	 1.0,-1.0
	 1.0, 1.0
	-1.0, 1.0
	-1.0,-1.0

	At this stage, the module only takes LAT/LON data and converts it to
UTM coordinate before output to geometry viewer.

	Input Data: Name of the state and county boundary file
		    The SW corner (in UTM coordinate) of the map
		    The NE corner (in UTM coordinate) of the map
		    The UTM zone

	Output data: Geom

	This module belongs to a group of modules submitted to the Inter- 
national AVS Center for displaying points, lines and polygons over a map of the
United States. The group of the modules includes:

	AFSextract: 	 	Extracting AFS Format Data
	AMSextract:		Extracting AMS Format Data
	LBFextract:		Extracting Link Base Mobile Data
	field_to_points:	Plot 3D points with color mapping
	field_to_lines:		Plot 3D lines with color mapping
	field_to_polygons:	Plot 3D polygons with color mapping
	getmap:			Plot political boundary of states and
				countys in the United State
	geomreset:		Reset and normalize the geometry viewer
				automatically
	zoomer:			A driver to allow zoom in and out to a 
				particular geographical area
	resetlegend:		To reset the position and size of ithe color 
				legend if usedirregulr
	minmax:			To find out the min and max value of a field


	An example network is shown below:

			
				zoomer
			 	|||||
 				getmap
				   |
				geometry viewer
				   |
				geom reset 


	Contact person: Jeff Wang, MCNC/NCSC, (919)-248-9242