[Proj] Specify a different directory for gsb files

Ervin Oswaldo Escobar Salazar ervinoswaldoescobar at gmail.com
Fri Aug 31 04:12:44 EDT 2007

Sorry, i must correct something...

The option of creating an environment variable works if you do not specify
the path of the file in the command line. I said that didn't work but is not
true. After some tests, i confirm that if you have set the variable to the
correct path, and use the options +nadgrids=myfile.gsb, PROJ makes the NTV2
transformation correctly.

Sorry for the mistake. Now i must enquire how to fix an environment variable
using ASP, and without administative privileges.
Any other ideas would be appreciated.
Thanks in advance for your help.

2007/8/31, Ervin Oswaldo Escobar Salazar <ervinoswaldoescobar at gmail.com>:
> I would like to point out that my question makes a lot of sense...
> Frank, i am using a hosting service where every user has assigned a
> specified directory (for instance c:\users\...\...\user7771) and so we have
> no administrative privileges. In addition, we are using a server side
> scripting language to develop a guided interface to PROJ.4, so i do not
> expect to be able to fix environment variables nor write on c:\proj
> directly.
> Anyway, on my servers, where i have all the administrative privileges,
> i've been carrying some tests according to your recommendations:
> - I tried to include in the command line the path to the gsb file: for
> instance +nadgrids=c:\proj\xnad\myfile.gsb (notice that i have introduced
> xnad instead of nad, and obviously renamed the nad folder to xnad
> previosly). The RESULT DOES NOT WORK. Testing with some coordinates didn't
> make the NTV2 datum shifting.
> - I also tried to set a new environment variable form the DOS prompt, with
> the sentence: set PROJ_LIB=C:\PROJ\XNAD. Afterwards, and also from the DOS
> prompt, the sentence SET reports the successful creation of the variable
> pointing at the specified path. In spite of all of this, the RESULT DOES NOT
> WORK. Testing again with some coordinates, didn't make the NTV2 datum
> shifting.
> Any other idea? If the first option would work (to introduce the path of
> the gsb file in the command line of cs2cs) it would be fine for me, because
> i am using a shell to execute command line sentences through a server side
> scripting languaje.
> Thanks to both of you for your attention and responses.
> 2007/8/29, Frank Warmerdam <warmerdam at pobox.com>:
> >
> > Ervin Oswaldo Escobar Salazar wrote:
> > > Uff.. I cannot access to the configuration of the server... cannot set
> >
> > > environment variables nor writing at c:\proj
> > > Any other idea?? I am completely knocked out.
> >
> > Ervin,
> >
> > Well, what can you modify?  There are also build time things, and
> > changes
> > that can be made in the code to modify this but it seems unlikely you
> > can
> > apply such changes if you can't alter the environment.
> >
> > Can you affect the cs2cs commandline?  (If so, why can't you set
> > environment
> > variables!)  You can give a specific path a gsb file on the commandline
> > with the +nadgrids directive.
> >
> > eg.
> > +nadgrids=D:\abc.gsb
> >
> > The more I think about it, the more irritating it is that you ask this
> > question without explaining the constraints on your situation!
> >
> > Best regards,
> > --
> >
> > ---------------------------------------+--------------------------------------
> > I set the clouds in motion - turn up   | Frank Warmerdam,
> > warmerdam at pobox.com
> > light and sound - activate the windows | http://pobox.com/~warmerdam
> > and watch the world go round - Rush    | President OSGeo,
> > http://osgeo.org
> >
> > _______________________________________________
> > Proj mailing list
> > Proj at lists.maptools.org
> > http://lists.maptools.org/mailman/listinfo/proj
> >
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