[processing] Don't round grass7 extent and resolution to integer

ninsbl · m-kuhn · commit 75c76f51f17d · 2016-05-23T08:49:29.000+02:00
fix #14582 See: https://hub.qgis.org/issues/14582 The commit removes the a-flag when the grass region for raster analysis is set. The a-flag causes in some cases unwanted rounding of raster extend / resolution, and should not be set hardcoded in processing. It is usually used in combination with the "res" option. For aligning the pixels of the GRASS region to a specific raster, the align option should be used (and not the a-flag). See: https://grass.osgeo.org/grass70/manuals/g.region.html GRASS 6.4 algs do not use the a-flag either, which explains why this bug appears only for GRASS 7.
diff --git a/python/plugins/processing/algs/grass7/Grass7Algorithm.py b/python/plugins/processing/algs/grass7/Grass7Algorithm.py
@@ -383,7 +383,6 @@ def processInputs(self):
             unicode(self.getParameterValue(self.GRASS_REGION_EXTENT_PARAMETER))
         regionCoords = region.split(',')
         command = 'g.region'
-        command += ' -a'
         command += ' n=' + unicode(regionCoords[3])
         command += ' s=' + unicode(regionCoords[2])
         command += ' e=' + unicode(regionCoords[1])
