[GRASS-dev] [GRASS GIS] #387: r.grow.distance, r.random.surface ignores raster MASK

[GRASS GIS]

#387: r.grow.distance, r.random.surface ignores raster MASK
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 Reporter:  marisn       |       Owner:  grass-dev at lists.osgeo.org
     Type:  defect       |      Status:  new                      
 Priority:  major        |   Milestone:  6.4.0                    
Component:  Raster       |     Version:  unspecified              
 Keywords:               |    Platform:  Unspecified              
      Cpu:  Unspecified  |  
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 When r.grow.distance or r.random.surface are run with enabled raster MASK,
 mask is used only to filter out input values but does not affect output
 maps (they contain also values in areas hidden by mask).
 {{{
 g.copy rast=trn.sites,MASK
 r.grow.distance input=roads distance=dist_to_road
 r.random.surface output=randomized
 g.remove rast=MASK
 }}}
 Display resulting maps -> areas OUTSIDE of MASK also contain some values.
 In r.random.surface case value in MASKed area is NOT random. As most GRASS
 modules will work only in not masked area, it's conterintuitive and
 requires additional processing to remove MASKed areas from output maps.

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Ticket URL: <http://trac.osgeo.org/grass/ticket/387>
GRASS GIS <http://grass.osgeo.org>