<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Note that there is nothing stopping users loading the tin polygons (triangles) into a topology.<br><br>Brent Wood<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Sandro Santilli <strk@keybit.net><br>Subject: Re: [postgis-devel] #1898: ST_DelaunayTriangles option to output as TIN<br>To: "PostGIS Development Discussion" <postgis-devel@postgis.refractions.net><br>Date: Saturday, September 15, 2012, 2:15 AM<br><br><div class="plainMail">On Fri, Sep 14, 2012 at 03:32:09PM +0200, Tom van Tilburg wrote:<br>> On 14-9-2012 11:52, Sandro Santilli wrote:<br>> ><br>> >>Is there any prospects on the making of this?<br>> >Interested in helping or co-funding ?<br>> I'm afraid only on the level of testing/documenting, I'm lacking the<br>> skills and budget.<br>> Is there
already work done on the topic or is it waiting for funding?<br><br>I think the next step for it would be reviewing and improving the TIN<br>support in the underlying lwgeom library. All is known about it is in<br>the ticket: <a href="http://trac.osgeo.org/postgis/ticket/1898" target="_blank">http://trac.osgeo.org/postgis/ticket/1898</a><br><br>> I know a topology need not be a TIN, but isn't a TIN describing a topology?<br><br>Theoretically, but the way it is stored in PostGIS full topological<br>definition (is just a bunch of polygons, tagged as a TIN). <br><br>> Could a poor man's TIN be a topology with some strict rules on the<br>> number of points?<br><br>There's no such data structure in postgis (C level) representing a topology.<br><br>--strk;<br><br> <a href="http://www.cartodb.com" target="_blank">http://www.cartodb.com</a> - Map, analyze and build applications with your data<br><br>
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