[GRASS-dev] [GRASS GIS] #1988: towgs84 datum transform options not maintained with shapefile export

[GRASS GIS]

#1988: towgs84 datum transform options not maintained with shapefile export
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 Reporter:  voncasec            |       Owner:  grass-dev@…              
     Type:  defect              |      Status:  new                      
 Priority:  normal              |   Milestone:  6.4.3                    
Component:  Projections/Datums  |     Version:  unspecified              
 Keywords:  g.proj, v.out.ogr   |    Platform:  Linux                    
      Cpu:  x86-64              |  
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Changes (by hamish):

  * component:  Default => Projections/Datums


Comment:

 Yes, it's a known issue, and it needs to be solved in GDAL/OGR first. If I
 recall correctly, WKT doesn't have a defined way to include datum
 transforms, ISTR some time ago (older than that ticket) Frank suggested it
 could be packed into something like a comment term, but then that would
 only be known to other osgeo-stack software which knew to look for it.

 Also, the proj4 epsg file includes explicit +towgs84 terms for some SRSs,
 but others not (several options for the user to choose from under the
 umbrella of the generalized code); the one referred to in the gdal ticket
 (epsg:4632) is one of the ones with explicit +towgs84 terms in the epsg
 def'n.


 ?,
 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1988#comment:1>
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