[Community] Access Violation Error when using to_wkt method
darren at omc-international.com
Mon Aug 9 04:18:04 EEST 2010
Thanks for your reply. My version of Shapely came from the link on
http://trac.gispython.org/lab/wiki/Shapely. My version of python is 2.5.2
and was from python.org. Also, when I referred to a large set of point
data, I am talking of the order of 6 million points that I am performing the
cascaded union on.
Thanks in advance for any advice that you can give me.
From: community-bounces at lists.gispython.org
[mailto:community-bounces at lists.gispython.org] On Behalf Of Sean Gillies
Sent: Saturday, 7 August 2010 1:35 PM
To: gispython.org community projects
Subject: Re: [Community] Access Violation Error when using to_wkt method
On Wed, Aug 4, 2010 at 12:02 AM, Darren Waters
<darren at omc-international.com> wrote:
> Hi All,
> I am using shapely 1.2.2 (python 2.5 on a Windows system) to generate
> a coverage polygon for a large set of point data. To achieve this I
> am producing a series of square polygons (buffered around each point)
> and then using a cascaded_union to join overlapping geometries to
> yield a multipolygon object. Unfortunately, when I try and output this
> geometry to a well known text representation, using the to_wkt()
> method, I get an error
> (*** WindowsError: exception: access violation reading 0x00000000).
> Has anyone else experienced this problem and can anyone suggest a
> This problem seems like it may be related to an issue discussed on the
> geos-devel list
Aron's patch has been in Shapely for some time. Where did your Windows
Python come from? Python.org? Elsewhere?
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