Nice one! We'll have to add this to the C++ API during hackfest (or before if I get a chance).<br>Unfortunately a lot of my QGIS stuff is on hold until the hackfest do to time constraints :-(<br>Once it's added at the C++ level, I'll add it to the Python API as well, so others can use it, <br>
I think this will be a very useful function!<br><br>Carson<br><br><div class="gmail_quote">On Wed, Oct 7, 2009 at 1:03 PM, Paolo Cavallini <span dir="ltr"><<a href="mailto:cavallini@faunalia.it">cavallini@faunalia.it</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Carson Farmer ha scritto:<br>
<div class="im"><br>
> Yes this is quite slow... in fact, this is a really simple<br>
> implementation of geometry checking,<br>
> and is done almost entirely within Python, so it's quite slow. I don't<br>
> know if there is a GEOS<br>
> function that will do this for us, if there is, I have change the code<br>
> to take advantage of this,<br>
<br>
</div><a href="http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1geom_1_1Geometry.html#a16" target="_blank">http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1geom_1_1Geometry.html#a16</a> ?<br>
<br>
I think PostGIS use this for is_valid.<br>
<div><div></div><div class="h5">All the best.<br>
--<br>
Paolo Cavallini: <a href="http://www.faunalia.it/pc" target="_blank">http://www.faunalia.it/pc</a><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Carson Farmer<br>National Centre for Geocomputation<br>John Hume Building,<br>National University of Ireland, Maynooth,<br>Maynooth,<br>Co. Kildare,<br>Ireland.<br>
<a href="http://www.carsonfarmer.com">www.carsonfarmer.com</a><br>