[GRASS-dev] Re: [GRASS GIS] #1219: Integrate the IGNF register and the shift grid RGF93-NTF in grass (was: Integrate the IGNF register and the shift grid RGF93/NTF in grass)

[GRASS GIS]

#1219: Integrate the IGNF register and the shift grid RGF93-NTF in grass
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 Reporter:  lemaitret                           |       Owner:  grass-dev@…              
     Type:  enhancement                         |      Status:  new                      
 Priority:  normal                              |   Milestone:  6.4.1                    
Component:  Projections/Datums                  |     Version:  6.4.0                    
 Keywords:  IGNF register shift grid NTF RGF93  |    Platform:  All                      
      Cpu:  All                                 |  
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Changes (by lemaitret):

  * platform:  Unspecified => All
  * cpu:  Unspecified => All
  * version:  unspecified => 6.4.0
  * milestone:  => 6.4.1


Comment:

 People need maybe more description. I try to give them here.

 First of all, I update the link I gave before :
 [http://grass.osgeo.org/wiki/IGNF_register_and_shift_grid_NTF-RGF93 in
 English] and [http://grass.osgeo.org/wiki
 /IGNF_register_and_shift_grid_NTF-RGF93/fr in French]

 The IGNF registry is a document such as the EPSG specifications : it
 describes many projection parameters and give them an ID. The EPSG ID can
 be used in GRASS to create a location, but not the IGNF ID.
 On a Linux system the IGNF and the EPSG are in the folder:
 /usr/share/proj/ and they seem to be both well used by proj. GRASS manage
 to use the EPSG file, but not the IGNF.

 '''It should be good to have the possibility to select and use the IGNF
 registry to define a location. It's currently not possible to well parse
 the IGNF registry with the location wizard.'''

 A subproblem : the IGNF registry mentions the shift grid ntf_r93.gsb. To
 be used, this grid should be in the etc/nad/ folder of GRASS (on Linux and
 grass 6.4 : /usr/lib/grass64/etc/nad/).

 '''It should be good to have a copy of the ntf_r93.gsb shift grid in the
 etc/nad/ folder of grass to use it.'''

 Other links :
 IGNF registry : http://lambert93.ign.fr/fileadmin/files/IGNF
 ntf_r93.gsb shift grid :
 http://lambert93.ign.fr/fileadmin/files/ntf_r93.gsb

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1219#comment:2>
GRASS GIS <http://grass.osgeo.org>