[postgis-users] PostGIS 1.3.3 on Windows XP Unstable

Paul Ramsey pramsey at cleverelephant.ca
Mon Aug 11 13:38:24 PDT 2008

On Mon, Aug 11, 2008 at 1:25 PM, Bresnahan, Mike
<Mike.Bresnahan at bestbuy.com> wrote:

> 1) When I call buffer() with a value other than zero, postgres.exe
> consumes RAM progressively until my machine begins to thrash and I am
> forced to power cycle it. My machine has 3G of RAM.

For any and all geometries, or do you have cases? (we love cases...)

> 2) When I call st_simplifypreservetopology() with a large tolerance, it
> produces an invalid geometry. This has been reported on this list
> previously:
> http://postgis.refractions.net/pipermail/postgis-users/2008-April/019327
> .html

well,... hm. Could you put this into trac so we don't lose it? Best
would be in the GEOS trac, actually (http://trac.osgeo.org/geos) Once
you get into really large tolerances, preserving topology starts to
get problematic, for hopefully obvious reasons... I'm not sure how
robust Martin's routines are supposed to be as tolerance gets really


> I'm feeling some pain.
> I was able to work around the st_disjoint() problem by using
> st_intersects(). Hopefully, I can work around these other problems as
> well. I am trying to find a replacement for Oracle 11.1, because Oracle
> has been giving me so many problems. So far, PostGIS seems much, much
> faster, but has the above problems.
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