[GRASS-dev] [GRASS GIS] #2428: r.external to accept gdal config options

[GRASS GIS]

#2428: r.external to accept gdal config options
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  Reporter:  perrygeo     |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  normal       |  Milestone:  7.1.0
 Component:  Default      |    Version:  svn-trunk
Resolution:               |   Keywords:  r.external
       CPU:  x86-64       |   Platform:  Unspecified
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Comment (by glynn):

 Replying to [comment:4 dylan]:
 > Could this same block of code be used within `r.external`? I don't fully
 understand how `r.external` works, so I suppose that it is more
 complicated than this.

 r.external itself just sets up the "link" between GRASS and the data file.
 The actual I/O occurs in lib/raster (gdal.c, open.c, get_row.c, close.c)
 when a GRASS module reads the map.

 But the data which r.external controls is per-map, while this appears to
 be a global setting. What happens when a module reads multiple GDAL-linked
 maps with different settings? It might make more sense to set this in
 Rast_init_gdal() from an environment variable or $GISRC variable.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2428#comment:5>
GRASS GIS <https://grass.osgeo.org>