[GRASS-dev] Re: [GRASS GIS] #674: add a region option flag to v.proj / r.proj

[GRASS GIS]

#674: add a region option flag to v.proj / r.proj
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  Reporter:  timmie       |       Owner:  grass-dev at lists.osgeo.org
      Type:  enhancement  |      Status:  new                      
  Priority:  normal       |   Milestone:  6.5.0                    
 Component:  Vector       |     Version:  svn-develbranch6         
Resolution:               |    Keywords:  v.proj                   
  Platform:  Linux        |         Cpu:  x86-32                   
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Changes (by hamish):

  * keywords:  => v.proj
  * type:  defect => enhancement
  * component:  default => Vector
  * milestone:  6.4.0 => 6.5.0

Comment:

 It is not surprising it ended in error, you asked it to do something
 mathematically unsuitable.

 crop your vector with v.in.region + v.overlay before you try to project
 it. simply selecting line features if they cross the target region is no
 good as the line could extend far out of zone. simply throwing away
 vertices outside the region is no good too because it breaks topology.


 the error message could be clearer, beyond that I'd consider to close this
 as wontfix.


 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/674#comment:1>
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