 AreaGrd -    A ESRI grid of areas of 30 arc-second cells.  The data
	      table (VAT) contains the cell areas in the field: [Area].  
              The units are square kilometers.  Tha Value Field simply 
              represents a row numberfor a specific Latitude.  All cells
              on the same row have the same area. Cell areas are largest
              at the equator and smallest at the poles. 
