[postgis-devel] topology expectations?

[Sandro Santilli]

Good ideas, could you note them on the wiki page ?

--strk;

On Wed, Mar 28, 2012 at 12:47:45PM +1300, Mike Toews wrote:
> On 22 March 2012 05:06, Sandro Santilli <strk at keybit.net> wrote:
> > Hey, you have people willing to listen now :)
> >
> > Would you want to dump some ideas on the recently added page ?
> > http://trac.osgeo.org/postgis/wiki/ToleranceDiscussion
> >
> > Looking forward to you feedback!
> 
> One idea to help solve the coordinate robustness issue that has not
> been discussed on postgis-devel is to expose the GEOS
> PrecisionModel[1] to the C API. Here is some previous discussion on
> geos-devel [2].
> 
> You can graphically test the PrecisionModel using JTS TestBuilder,
> setting Edit > Precision Model at the top menu.
> 
> However, if implemented, I'm not sure if or how a user would be able
> to modify the precision model for a particular geometry/dataset. I
> suppose there could be metadata for topology users to specify a
> tolerance, of say 0.001 to snap all coordinates to the nearest
> millimeter.
> 
> [1] http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1geom_1_1PrecisionModel.html
> [2] http://old.nabble.com/Change-GEOS-precision-model-td30954848.html
> 
> -Mike
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