[GRASS-user] Large vector files

Glynn Clements glynn at gclements.plus.com
Sun Oct 8 08:26:19 EDT 2006

Hamish wrote:

> > I would _highly_recommend trying r.in.xyz if you have not already done
> > so. Especially with LIDAR and other forms of remotely-sensed data.
> > I've had good success with it. Note there is also a parameter in
> > r.in.xyz to control how much of the input map to keep in memory,
> > allowing you to run the data import in multiple passes.  
> note the r.in.xyz memory parameter is to help with massive RASTER
> regions, nothing directly to do with the size of the input file.
> The input file is not kept in memory! The output raster grid is.
> I am always looking for feedback on how r.in.xyz goes with massive input
> data. (>2gb? >4gb?)

r.in.xyz doesn't use LFS, so it will be limited to 2Gb on 32-bit
systems (any system where "long" is 32 bits). As it uses ANSI stdio
functions (including ftell/fseek), extending it to support large files
would be non-trivial.

Glynn Clements <glynn at gclements.plus.com>

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