Hi folks -

These files are geographics information system data obtained through 
Arc Info. I have placed three files here :

usa.plotxyz.dat		: map of usa in readable format by plot_xyz module
usa.dense.gis.dat       : very specific map of usa in standard arcinfo coverage
			  format	
usa.vague.gis.dat	: less specifc map of usa in standard arcinfo coverage
			  format	

All files are in an ASCII, endpoint/line segment format. The coordinates
are unprojected latitute and longitude.  

The usa.ployxyz.dat file can be read straight into AVS with the 
plot_xyz module.

Perhaps someone could write a read_ARCinfo module ?

Be careful - these maps are very specific.  You can have up to 50,000
line segments in the Chesapeke bay alone if you don't be careful.

Have fun,

-terry


----
Terry Myerson
International AVS Center
North Carolina Supercomputing Center