[gdal-dev] Re: Fwd: merging shapefiles larger than 4GB

Harsha Ch harsha.ch at gmail.com
Tue May 3 10:39:17 EDT 2011

Thanks all for the replies and pointers. Jukka I am curious how were you
able to merge upto 8GB shape files
I am using mapnik to render shape files its able to read shape files larger
than 4Gb. I tried ogr2ogr to merge shape files which its failing after file
size reached to 4G. I looked at the ticket and I see the patch is applied to
gdal and I am building it from source. Could you tell me how did you merge
shape files in this case.
Thank you,

On Mon, May 2, 2011 at 9:19 PM, Jukka Rahkonen <jukka.rahkonen at mmmtike.fi>wrote:

> Brian Wilson <brian <at> wildsong.biz> writes:
> >
> > I am afraid you are out of luck, the shapefile format restricts its size
> to 32
> bit. See bytes 24-27http://en.wikipedia.org/wiki/ShapefileEven if the SHP
> part
> was not so restricted, I bet the DBF part is.
> Actually the SHP part is setting the limit. DBF part can be much bigger and
> I
> have myself one with 32 GB. See also
> http://trac.osgeo.org/gdal/ticket/3236
> Spatialite has worked fine for me as a target when merging shapefiles but
> only
> up to about 8 GB file size. After that appending new data became too slow.
> It
> was a long time ago and gdal Spatialite driver may be better now.
> -Jukka Rahkonen-
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