[GRASS-user] New page IGNF register and shift grid NTF/RGF93

Paul Kelly paul-grass at stjohnspoint.co.uk
Thu Dec 2 14:14:34 EST 2010

On Thu, 2 Dec 2010, Thibault Lemaitre wrote:

> I updated the tutorial in question. There was some problem in the previous 
> version : the modification of the PROJ_INFO file was not good and the grid 
> file needs to be in the nad directory of GRASS. The method explained by the 
> tutorial, needs the administrator rights on Linux.
> Somebody knows more about the nadgrids specification in the PROJ_INFO file ? 
> I mean, how to set a grid which is not in the nad directory of GRASS ? If 
> there is this possibility, a simple normal user would be able to that.

You should be able to just put the full path in the PROJ_INFO file - does 
that not work? If not can you post the contents of the PROJ_INFO file to 
the list.

We should probably include the French gridshift file for datum 
transformations NTF <--> RGF93 in the GRASS distribution, like we do for 
the USA, Canada, New Zealand files. That would make it very easy to use. 
How large is the file?


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