[GRASS-dev] [GRASS GIS] #3161: different results by v.in.ogr --ui and vector import wizzard (data shift)

[GRASS GIS]

#3161: different results by v.in.ogr --ui and vector import wizzard (data shift)
----------------------+---------------------------
  Reporter:  hellik   |      Owner:  grass-dev@…
      Type:  defect   |     Status:  new
  Priority:  blocker  |  Milestone:  7.2.0
 Component:  Vector   |    Version:  svn-trunk
Resolution:           |   Keywords:  vector import
       CPU:  x86-64   |   Platform:  MSWindows 7
----------------------+---------------------------

Comment (by hellik):

 Replying to [comment:1 mmetz]:
 >
 > In this case the datum transformation parameters selected by GDAL are
 > {{{
 > towgs : 577.326,90.129,463.919,5.137,1.474,5.297,2.4232
 > }}}
 > which is similar but not equal to those used in your location
 > {{{
 > towgs84 : 577.326,90.129,463.919,5.1366,1.4742,5.2970,2.4232
 > }}}


 {{{
 g.proj epsg=31287 datum_trans=-1
 ---
 1
 Used in whole hermannskogel region
 towgs84=653.000,-212.000,449.000
 Default 3-Parameter Transformation (May not be optimum for older datums;
 use this only if no more appropriate options are available.)
 ---
 2
 Used in Austria
 towgs84=577.326,90.129,463.919,5.1366,1.4742,5.2970,2.4232
 Accuracy approx. 1.5m
 ---
 3
 Used in Czech Republic
 towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56

 ---
 4
 Used in Slovakia
 towgs84=485.021,169.465,483.839,7.786342,4.397554,4.102655,0

 ---
 5
 Used in Slovenia
 towgs84=426.9,142.6,460.1,4.91,4.49,-12.42,17.1
 }}}

 mmhh, g.proj gives slightly different +towgs84 parameters as you mention
 it for GDAL/OGR.

 {{{
 System Info
 GRASS Version: 7.3.svn
 GRASS SVN revision: r69510
 Build date: 2016-09-17
 Build platform: x86_64-w64-mingw32
 GDAL: 2.1.1
 PROJ.4: 4.9.3
 GEOS: 3.5.0
 SQLite: 3.14.1
 Python: 2.7.5
 wxPython: 2.8.12.1
 Platform: Windows-8-6.2.9200 (OSGeo4W)
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3161#comment:3>
GRASS GIS <https://grass.osgeo.org>