[GRASS-dev] [GRASS GIS] #1849: Cannot create a new GRASS Location using a custom proj4 string

[GRASS GIS]

#1849: Cannot create a new GRASS Location using a custom proj4 string
-------------------------------------------+--------------------------------
 Reporter:  voncasec                       |       Owner:  grass-dev@…              
     Type:  defect                         |      Status:  new                      
 Priority:  critical                       |   Milestone:  6.4.3                    
Component:  Projections/Datums             |     Version:  unspecified              
 Keywords:  proj4, location wizard, wxgui  |    Platform:  Linux                    
      Cpu:  x86-64                         |  
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Comment(by hamish):

 some debug:
 {{{
 # ok datum name, mult options:
 G:g.proj > g.proj proj4='+proj=utm +zone=10 +datum=nad83' datumtrans=-1
 ..force=0
 D0/0: set_datumtrans(): GPJ__get_datum_params() status=1
 ---
 1
 Used in whole nad83 region
 towgs84=0.000,0.000,0.000
 Default 3-Parameter Transformation (May not be optimum for older datums;
 use this only if no more appropriate options are available.)
 ---
 2
 Used in Florida
 [...]

 (ok)


 # bogus datum name:
 G:g.proj > g.proj proj4='+proj=utm +zone=10 +datum=nad839999'
 datumtrans=-1
 WARNING: Datum <unknown> not recognised by GRASS and no parameters found
 ..force=0
 D0/0: set_datumtrans(): GPJ__get_datum_params() status=-1
 D0/0: set_datumtrans(): Datum name either invalid or not supplied.
 ERROR: No output format specified, define one of flags -p, -g, -j, or -w

 (doesn't quit when it should)



 # ok datum name, single option:
 G:g.proj > g.proj proj4='+proj=utm +zone=10 +datum=wgs84' datumtrans=-1
 ..force=0
 D0/0: set_datumtrans(): GPJ__get_datum_params() status=1
 ERROR: No output format specified, define one of flags -p, -g, -j, or -w



 # same as above w/ -t
 G:g.proj > g.proj proj4='+proj=utm +zone=10 +datum=wgs84' datumtrans=-1 -t
 ..force=1
 D0/0: set_datumtrans(): GPJ__get_datum_params() status=1
 ---
 1
 Used in whole wgs84 region
 towgs84=0.000,0.000,0.000
 Default 3-Parameter Transformation (May not be optimum for older datums;
 use this only if no more appropriate options are available.)
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1849#comment:3>
GRASS GIS <http://grass.osgeo.org>