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World Data -
  http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/ndcdb.html - DEM/DLG data/info
  http://www.easyway.net/~mshannon/fs51.html - has done work on using this 
					       and other data

Moon position code -
  http://www.auslig.gov.au/geodesy/astro/smpos.htm
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Aircraft Data -
  http://www.warplane.org/plane/h.html - navion info/photo
  http://aeroweb.brooklyn.cuny.edu/aircraft/l17a.html - navion info

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OpenGL links -
  http://reality.sgi.com/mjk_asd/opengl-links.html
  http://www.conix3d.com/  (OpenGL for the Macintosh)

Linux/GL/Hardware Acceleration
  http://cyclone.cs.clemson.edu/~rmg/linux.html

General OpenGL Graphics Techniques
  http://reality.sgi.com/mjk_asd/opengl-links.html#technique

Shadows in GL
  http://reality.sgi.com/mjk_asd/tips/rts/

Convert Polygon models into more efficient "strips"
  http://www.cs.sunysb.edu/~evans/stripe.html
  http://tofu.alt.net/~grantham/meshifier/show.html

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World Modeling/Representations -
  http://www.multigen.com (comercial)
  http://radsite.lbl.gov/mgf/HOME.html
  http://users.deltanet.com/~powerg/Apprentice/
  http://www.cs.uni-bonn.de/~schaefer/mrt.html
* http://www.bearcave.com/dxf/dxfintro.htm (DXF to GL, dynamic mem mngmnt)
  http://www.questarproductions.com/ (comercial)
  http://www.comp.lancs.ac.uk/computing/users/andy/ac3dlinux.html (3d modeler)

VRML -
  http://www.interlog.com/~lmcrae/  (vrml2opengl)

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Richard Stallman quote from an article in BYTE magazine.  GNU'S NOT
UNIX, Conducted by David Betz and Jon Edwards.  Richard Stallman
discusses his public-domain UNIX-compatible software system with BYTE
editors.  (July 1986)

Of course, I am not designing the software to run on the kinds of
computers that are prevalent today.  I knew when I started this
project it was going to take a few years.  I therefore decided that I
didn't want to make a worse system by taking on the additional
challenge of making it run in the currently constrained environment.
So instead I decided I'm going to write it in the way that seems the
most natural and best.  I am confident that in a couple of years
machines of sufficient size will be prevalent.  In fact, increases in
memory size are happening so fast it surprises me how slow most of the
people are to put in virtual memory; I think it is totally essential.

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