[GRASS-dev] Re: [GRASS GIS] #1220: Error when creating vector(areas) from raster

[GRASS GIS]

#1220: Error when creating vector(areas) from raster
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 Reporter:  toyzerocha1980  |       Owner:  grass-dev@…              
     Type:  defect          |      Status:  new                      
 Priority:  blocker         |   Milestone:  6.4.1                    
Component:  Vector          |     Version:                           
 Keywords:                  |    Platform:  MSWindows XP             
      Cpu:  x86-32          |  
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Comment(by mmetz):

 Replying to [comment:3 neteler]:
 > Replying to [comment:2 toyzerocha1980]:
 > > Ok I have decided to create/build topology
 >
 {{{
 > > v.build map=test10 at National error=error10
 > > Coor files of vector map <teste10 at National> is larger than it should
 be (99266507 bytes excess)
 > > Building topology for vector map <teste10>...
 > > Registering primitives...
 > > 1874449 primitives registered
 > > 5317522 vertices registered
 > > Building areas...
 > > 601738 areas built
 > > 117075 isles built
 > ...
 }}}
 >
 > perhaps you exceed the 2Gb limit here? GRASS 7 supports large file
 support (LFS).

 I don't think so. The coor file size warning is issued because the vector
 was not properly closed when creating it with r.to.vect and the coor file
 size was not written to the coor header. So far this warning can be
 ignored. Also, there is no LFS (yet) in wingrass, also not in 7.

 601738 areas is a lot and you are likely to run out of memory with such a
 large vector on a 32 bit operating system, or a 64 bit operating system
 with insufficient system memory. I am planning to substantially reduce
 memory requirements for vector processing in grass 7 such that you could
 easily process 601738 areas with 32 bit wingrass, but that will still take
 some time.

 Markus M

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1220#comment:4>
GRASS GIS <http://grass.osgeo.org>