[GRASS-dev] [GRASS GIS] #3509: g.region grow with negative number limited because of top and bottom

[GRASS GIS]

#3509: g.region grow with negative number limited because of top and bottom
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  Reporter:  wenzeslaus  |      Owner:  grass-dev@…
      Type:  defect      |     Status:  new
  Priority:  minor       |  Milestone:  7.6.0
 Component:  Raster      |    Version:  svn-trunk
Resolution:              |   Keywords:  grow, shrink, g.region, expand
       CPU:              |  computational region, extent, 3D
  Unspecified            |   Platform:  Unspecified
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Comment (by mmetz):

 Replying to [comment:3 wenzeslaus]:
 > What about just ignoring the request for decrease when the minimal range
 is reached? Not sure if that makes sense for X and Y, but it seems OK for
 Z.

 +1

 Introducing yet another flag is IMHO not a good idea, and it is against
 the idea that the `grow` option should apply to all dimensions. I would
 rather add a test for each dimension that the change results in a valid
 region: top must be > bottom, east must be > west, north must be > south.
 For latlon, north must be <= 90 degrees + 0.5 * ns_res, south must be >=
 -90 degrees - 0.5 * ns_res. A warning could be printed if growing in a
 specific dimension would result in an invalid region.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3509#comment:4>
GRASS GIS <https://grass.osgeo.org>