[geos-devel] Correct use of setPrecision

[Daniel Baston]

My understanding is that precision models are considered only in the
overlay options (and not in the geometry predicates).

Dan

On Mon, Sep 4, 2017 at 5:13 AM, Nyall Dawson <nyall.dawson at gmail.com> wrote:

> On 4 September 2017 at 17:29, Sandro Santilli <strk at kbt.io> wrote:
> > On Mon, Sep 04, 2017 at 04:28:32PM +1000, Nyall Dawson wrote:
> >
> >> However, after looking into this in more depth I think the original
> >> python code is incorrectly used. It's being used by QGIS in order to
> >> set a "tolerance" on a spatial join operation - i.e. to consider that
> >> two geometries which are 100m distant actually do intersect.
> >
> > [...]
> >
> >> If this is correct, is there any other way in GEOS to handle this
> situation?
> >
> > How about using GEOSDistance ?
>
> Thanks - that's a good option for intersects tests. I'm not sure
> offhand if it would be translatable to the other geometry predicates,
> but then I'd say trying to do a 'touches' or 'contains' test with a
> tolerance would be quite an edge case anyway.
>
> Nyall
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