[GRASS-dev] Re: [GRASS GIS] #428: g.proj -c defines wrong default values

[GRASS GIS]

#428: g.proj -c defines wrong default values
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  Reporter:  martinl  |       Owner:  grass-dev at lists.osgeo.org  
      Type:  defect   |      Status:  new                        
  Priority:  major    |   Milestone:  6.4.0                      
 Component:  default  |     Version:  6.4.0 RCs                  
Resolution:           |    Keywords:  projection, create location
  Platform:  All      |         Cpu:  All                        
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Comment (by pkelly):

 Without looking in depth, it seems to me it is a bug / "feature" of PROJ
 that the first syntax, i.e. with no parameters specified, actually works.
 For clarity it is best to specify the parameters.

 How g.proj works is it uses OGR functions to parse and validate the PROJ.4
 string before converting it into GRASS format. OGR interprets the string
 differently from PROJ.4 - internally it converts it to WKT format so I'm
 guessing that it requires the parameters to be specified, and because none
 are there it sets them to zero. Then when OGR exports the validated
 projection back to g.proj the parameters will be set to zero.

 Perhaps the best fix is for PROJ.4 to be modified so it does not accept
 the syntax with no parameters specified. But that is not good as it will
 break existing installations where people use the syntax with no
 parameters.

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Ticket URL: <http://trac.osgeo.org/grass/ticket/428#comment:4>
GRASS GIS <http://grass.osgeo.org>