Image Name                   :  el97mx
Boundaries                   :  Lat 12N to 35N ; Lon 239E to 287E
Color Scale, Upper (Red)     :  2500 meters and higher
Color Scale, Lower (Blue)    :     0 meters and lower 
Data Max value               :  3971 meters  
Data Min value               :   -85 meters
Illuminated from the         :  East

  This is an image generated from 2'x2' orthometric (above mean sea level)
heights covering Mexico and surrounding areas.  Interesting features to 
note about this image are:

  The Rocky/Sierra Madre Occidental mountain range stands out nicely in 
orange/red, showing both their height and their high-frequency nature.  
Less clearly delineated, but still obvious are the Sierra Madre Oriental
mountains on the East coast of Mexico, seen as yellow/orange (and red
around Mexico City).

  Significant portions of Eastern United States, the Yucatan Peninsula,
most of West Cuba and the Bahamas are low elevation areas and show up 
as a light/deep blue.  These areas are just above sea level in
elevation. As such, while it looks like these areas are
under water, they are merely shaded a very deep blue because of the color
scale.

  The completely mountainous terrain of Honduras is obvious, and is closely
correlated with the geoid high over that country.

  Negative elevations (land areas that are below sea level) are found in
the Salton Sea and Death Valley areas of South and Southeast California.


das/dgm 4/14/97