Hi Sean, 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. Cheers Darren -----Original Message----- From: [email protected] [mailto:[email protected]] 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 <[email protected]> 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 solution. > This problem seems like it may be related to an issue discussed on the > geos-devel list > (http://www.mail-archive.com/[email protected]/msg00996.html) > > Thanks > Darren Hi Darren, Aron's patch has been in Shapely for some time. Where did your Windows Python come from? Python.org? Elsewhere? -- Sean _______________________________________________ Community mailing list [email protected] http://lists.gispython.org/mailman/listinfo/community _______________________________________________ Community mailing list [email protected] http://lists.gispython.org/mailman/listinfo/community
