[GRASS-dev] [GRASS GIS] #1452: wx location wizard doesn't ask for datum transform options because proj4 4.7.1's epsg file is broken

[GRASS GIS]

#1452: wx location wizard doesn't ask for datum transform options because proj4
4.7.1's epsg file is broken
-------------------------------------+--------------------------------------
 Reporter:  hamish                   |       Owner:  grass-dev@…              
     Type:  defect                   |      Status:  new                      
 Priority:  critical                 |   Milestone:  6.4.3                    
Component:  Projections/Datums       |     Version:  svn-releasebranch64      
 Keywords:  location wizard, g.proj  |    Platform:  All                      
      Cpu:  All                      |  
-------------------------------------+--------------------------------------

Comment(by cmbarton):

 In fact eur50 is not recognized. Same is true for at least several other
 datums. Since they are not recognized, they do now spawn datum transforms.

 For example, wgs84 is recognized by g.proj


 {{{
 GRASS 7.0.svn (newLocation):~ > g.proj -d proj4='+proj=utm +datum=wgs84'
 GRASS datum code: wgs84
 WKT Name: WGS_1984
 Datum transformation parameters (PROJ.4 format):
         towgs84=0,0,0,0,0,0,0
 }}}

 but European Datum 1995 (eur50) is not recognized.

 {{{
 GRASS 7.0.svn (newLocation):~ > g.proj -d proj4='+proj=utm +datum=eur50'
 WARNING: Datum <unknown> not recognised by GRASS and no parameters found
 Datum name not present
 Datum parameters not present
 }}}

 All unrecognized datums that I tested are listed in
 ../etc/proj/datums.table

 Could this be a problem more with g.proj than with proj4?

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1452#comment:27>
GRASS GIS <http://grass.osgeo.org>