[GRASS-dev] [GRASS GIS] #2404: winGRASS: G_calloc error in v.to.rast

[GRASS GIS]

#2404: winGRASS: G_calloc error in v.to.rast
-------------------------+--------------------------------------------------
 Reporter:  neteler      |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  7.0.0                    
Component:  Vector       |     Version:  svn-trunk                
 Keywords:  v.to.rast    |    Platform:  MSWindows 7              
      Cpu:  Unspecified  |  
-------------------------+--------------------------------------------------
 winGRASS (32bit binaries):

 v.rast.stats --> which calls v.to.rast:

 {{{
 ERROR: G_calloc: unable to allocate 236326912 * 1 bytes of memory at
 raster.c:83
 ERROR: An error occurred while converting vector to raster
 }}}

 Computational region:

 {{{
 g.region rast=somemap at LANDCOVER -p
 projection: 99 (Lambert Azimuthal Equal Area)
 zone:       0
 datum:      etrs89
 ellipsoid:  grs80
 north:      5416100
 south:      941500
 west:       1547000
 east:       7316700
 nsres:      100
 ewres:      100
 rows:       44746
 cols:       57697
 cells:      2581709962

 g.region vect=othermap at LANDCOVER -p
 projection: 99 (Lambert Azimuthal Equal Area)
 zone:       0
 datum:      etrs89
 ellipsoid:  grs80
 north:      5310000
 south:      940000
 west:       1540000
 east:       6530000
 nsres:      100
 ewres:      100
 rows:       43700
 cols:       49900
 cells:      2180630000
 }}}

 System:
  * winGRASS 7.1
  * RAM 32 GB

 Also reported here:
  * http://lists.osgeo.org/pipermail/grass-user/2009-April/050076.html
  * http://lists.osgeo.org/pipermail/grass-user/2009-April/050074.html
  * http://lists.osgeo.org/pipermail/grass-user/2009-April/050075.html

 The issue might be the row cache in v.to.rast:
  *
 http://trac.osgeo.org/grass/browser/grass/trunk/scripts/v.rast.stats/v.rast.stats.py#L137
  * http://grass.osgeo.org/grass71/manuals/v.to.rast.html

 with rows=4096 (Number of rows to hold in memory by default).

 According to the latter email, the memory consumption would be (in GB,
 plus overhead):

 {{{
 > 4096 * 44746 rows * 8 bytes /1024 /1024 /1024
 [1] 1.36554
 }}}

 Given the 32GB of RAM, that should be ok (but even for winGRASS 7 32bit?).

 Maybe the row cache in v.to.rast should be "auto" according to the amount
 of pixels in a row?

 BTW: seen again here:
  * https://gis.stackexchange.com/questions/102273/error-g-calloc-v-to-rast

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/2404>
GRASS GIS <http://grass.osgeo.org>