The following email message from the author of PROJ clearly states that
the PROJ software may be legally included on the GVDR CD-ROM volume.

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Date: Wed, 3 Nov 93 10:53:39 EST
From: gie@charon.er.usgs.gov (Gerald I. Evenden)
To: maurer@magellan.stanford.edu

[... other text deleted ...]

>And finally, what is the copyright status of the source code to PROJ?
>I am curious because we will soon be producing a CD-ROM of data
>derived from Magellan spacecraft measurements of the planet Venus, and
>delivering that CD to the Planetary Data System.  I'd like to provide
>software to access the data, and in the best of worlds that would
>include the PROJ cartographic library.

Proj was developed on US Government time and thus it is public domain
with only one restriction that I know of: do not SELL it back to the
US Government.  Of course this should be mitigated if value-added
modifications were made or included as part of another product,
such as your CD-ROM.

I will hopefully make release 4.2.2 available in a few days which
will contain the correction to your problem as well as a fix to
program geod.

>Thanks again,
>-Michael
>______________________________________________________________________
>Michael Maurer          maurer@nova.stanford.edu        (415) 723-1024

Gerald (Jerry) I. Evenden   Internet: gie@charon.er.usgs.gov
voice: (508)563-6766          Postal: P.O. Box 1027
  fax: (508)457-2310                  N.Falmouth, MA 02556-1027