[GRASS-user] v.out.ogr performance
mahoneyd at unbc.ca
Fri Feb 9 15:50:26 EST 2007
> David Mahoney wrote:
>> I don't want to beat a dead horse, and I know that this has been
>> covered to a degree on this list before, but is there any way to
>> speed up the export of a large vector layer (points in this case) to
>> a shapefile? I have 750,000 points and it looks like it will take a
>> few hours to export. This is with the attribute data stored in a
>> PostgreSQL database.
>> I did build an index on the category field in the database, and I
>> think it helped to a degree, but I can't be certain that GRASS is
>> even using the index.
> v.out.ascii.db + ogr2ogr CSV -> Shapefile?
> (wiki add-ons)
> Some profiling is needed to understand why/where v.out.ogr is so very
> slow to export to a shapefile.
It seems that ogr2ogr can't create geometry from a csv file. gen2shp
works really well though.
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