[GRASS-user] nad grids storage

Vincent Bain bain at toraval.fr
Sun Aug 18 01:55:41 PDT 2013

Dear grass devs and users,
sorry for digging up this pretty old topic. It was about the end of my
initial message, see bellow (perhaps should I have opened a ticket for

The question was : is it possible to add the french nad grid to grids
provided by default in grass directories ?
Everytime I completely rebuild grass (after a make distclean) I have to
manually copy the ntf_r93.gsb file
into /usr/local/grass-XX.svn/etc/proj/nad/

It would be nice that grass sources included this nad grid ; here in
France it is fundamental whenever you need to switch between various
geodetic systems (ntf and rgf93).


Le jeudi 21 février 2013 à 18:28 +0100, Vincent Bain a écrit :
> Hi,
> while discussing with S. Turek about r.in.wms coping with french
> projection systems, I tested a dataset within grass70. Used to working
> with grass64 I store the french nadgrid (ntf_r93.gsb)
> in /usr/share/proj/ directory, making a symlink
> here: /usr/lib/grass64/etc/nad/
> On my local system I noticed for grass70 the grid is taken into account
> if stored here:
> /usr/local/grass-7.0.svn/etc/proj/nad/
> I am wondering :
> - if these multiple locations for a single file are necessary;
> - if they are correct for each version of grass I use;
> - if it is worth adding the french grid to grids provided by default in
> grass.
> Vincent.

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