[Qgis-user] Re: [GRASS-user] Problem importing/viewing a ~160MB shapefile

Nikos Alexandris nikos.alexandris at felis.uni-freiburg.de
Mon Oct 13 20:18:18 EDT 2008


On Mon, 2008-10-13 at 17:07 -0700, Hamish wrote:
> Nikos Alexandris wrote:
> > Dear All, apologies for the cross-posting but I have trouble to work
> > with a BIG shapefil (~160MB). I already used that shapefile in the past
> > without problems. But now I can't use it.
> 
> ? what changed?  did you install a new version of GDAL/OGR?
> I use 400mb shapefiles without problem..

Yes. Last time I used this file was some months ago (but the file is the
same... :-?).


> > In GRASS: I (almost) managed to import in GRASS this BIG shapefile but
> > the process *stucks* somewhere at "breaking intersections" point (...it
> > was running for 10 hours). I broke the process and the file was in
> > GRASS' database. I run v.build but it still is problematic. I can't get
> > anything on-display.
> 
> It just takes a long time when lines are very long and unbroken. It
> eventually gets there.
> 
> See Radim's vector TODO:
>   http://trac.osgeo.org/grass/browser/grass/trunk/doc/vector/TODO#L242
> 
> and search the archives for the "Florida Coastline" problem.

I am reading...

> 
> 
> the v.in.ogr spatial= option might help.
> 
> 
> > In QGIS: when I try to load directly the shapefile (not the GRASS
> > vector) my system freezes!! I haven't seen my linuxbox frozen since I
> > don't remember when. What could cause such behaviour?
> > Is there anyway to get the shapefile fixed out of GRASS?
> 
> once loaded into GRASS you can run the v.split command to split the long
> lines, then it is much faster (at least for other grass commands).
> 
Thanks for the tip. 
> 
> Hamish

Regards, Nikos



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