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<DIV><FONT face=Arial size=2>Hello,</FONT></DIV>
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<DIV><FONT face=Arial size=2>A long-time lurker appears and needs
help...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am considering developing a package that will
calculate signal reception for specific stations using the Longley Rice
Irregular Terrain Model. I need vector-topo data for the entire
country.</FONT></DIV>
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<DIV><FONT face=Arial size=2>1. What are my options this data? I
suppose that I should use the DEM data from USGS?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>2. Are there C or Perl libraries for working
with DEM's? Specifically, to use Longly Rice, I have to resample the
vector data to generate an elevation profile between two arbitrary points from
the vector-topo data. Any ideas on that either?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>3. When I am done I my data will be
<long>,< lat>,<reception index>; which I plan on treating as a
height field. What Grass tools can I use to create an image from height
field data.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>4. Also, are there any books out there to
jumpstart someone who knows things like MapInfo, and Linux, but not
Grass??</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Any input from the group is very much
appreciated.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance,</FONT></DIV>
<DIV><FONT face=Arial size=2>Robb</FONT></DIV></BODY></HTML>