[GRASS-dev] [GRASS GIS] #2676: r.neighbors on large rasters

[GRASS GIS]

#2676: r.neighbors  on large rasters
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  Reporter:  dnewcomb     |      Owner:  grass-dev@…
      Type:  enhancement  |     Status:  new
  Priority:  normal       |  Milestone:  7.0.1
 Component:  Default      |    Version:  svn-trunk
Resolution:               |   Keywords:  r.neighbors large rasters
       CPU:  x86-64       |   Platform:  Linux
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Comment (by glynn):

 Replying to [ticket:2676 dnewcomb]:

 > In main.c , line 139 I see :
 > int i , n;
 >
 >   I assume that this means that r.neighbors is limited to rasters with
 the number of cells in the 32 bit integer range?

 If it is, it has nothing to do with above declaration. "i" will never
 exceed the number of outputs, while "n" will never exceed the number of
 cells in the neighbourhood.

 r.neighbours operates row-by-row, only holding as many rows as are in the
 neighbourhood, and for method=average it isn't maintaining category data,
 so it shouldn't have any problems with rasters with more than 2!^31 cells.
 At least, there's no more reason for r.neighbors to have such issues than
 any other raster module.

 What are the actual dimensions (rows x columns) of the current region?
 (The dimensions of the input map aren't directly relevant).

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Ticket URL: <http://trac.osgeo.org/grass/ticket/2676#comment:1>
GRASS GIS <http://grass.osgeo.org>