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Type 
  'make install'
to install earthview in default INSTALL directory (/usr/X11R6/bin)
and data file in default DATA directory (/usr/share/earthview)
  'make help'
to get a brief help on Earthview, 
  'make alt'
to produce a jpeg output image of altitude/topography data, 
  'make pop'
to produce a jpeg output image of population data, 
  'make sun'
to display the jpeg files with sunclock.

To view the population data, just type
  './earthview -data population.gz'

The 'convert' utility from the ImageMagick package is needed for converting
the PPM files to JPG format. (It could be replaced by any other suitable 
routines for this purpose).
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