[geos-devel] Test OverlayNG for MVT tiling

Sandro Santilli strk at kbt.io
Mon Aug 24 12:58:45 PDT 2020


On Mon, Aug 24, 2020 at 09:38:35PM +0200, Sandro Santilli wrote:
> On Mon, Aug 03, 2020 at 11:48:02AM -0700, Martin Davis wrote:
> > Great that you're testing this.
> > 
> > Yes, currently the precision is not exposed via the C API (well, I think it
> > is technically, by setting the geometry precision model, but this involves
> > an expensive (and unnecessary) precision reduction step, so that's useless
> > for performance.
> > 
> > My hope is that the C API will expose overlay operations which take an
> > explicit precision (scale factor = 1 / grid size). This will invoke
> > snap-rounding, which should provide fully-robust rounded geometry - ideal
> > for clipping to low-resolution tiles - I hope!
> 
> Here it is: https://git.osgeo.org/gitea/geos/geos/pulls/105
> 
> I'm merging it shortly.

Merged with 87ce4c1a06460d82fa97fb1c7736434015928ac5

--strk;


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