[postgis-devel] #1898: ST_DelaunayTriangles option to output as TIN

[Sandro Santilli]

On Fri, Sep 14, 2012 at 03:32:09PM +0200, Tom van Tilburg wrote:
> On 14-9-2012 11:52, Sandro Santilli wrote:
> >
> >>Is there any prospects on the making of this?
> >Interested in helping or co-funding ?
> I'm afraid only on the level of testing/documenting, I'm lacking the
> skills and budget.
> Is there already work done on the topic or is it waiting for funding?

I think the next step for it would be reviewing and improving the TIN
support in the underlying lwgeom library. All is known about it is in
the ticket: http://trac.osgeo.org/postgis/ticket/1898

> I know a topology need not be a TIN, but isn't a TIN describing a topology?

Theoretically, but the way it is stored in PostGIS full topological
definition (is just a bunch of polygons, tagged as a TIN). 

> Could a poor man's TIN be a topology with some strict rules on the
> number of points?

There's no such data structure in postgis (C level) representing a topology.

--strk;

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