[geos-devel] 3D Intersections

Paul Ramsey pramsey at cleverelephant.ca
Wed Dec 23 14:34:04 PST 2020


We could maybe have a blog post or wiki page on it... Martin just implemented the new one, so now's a good time to explain the logic.
In general it's all 2D, but the 3D values are "filled in" on a best-effort basis for the derived geometry.
P

> On Dec 23, 2020, at 12:07 PM, Andrew Bell <andrew.bell.ia at gmail.com> wrote:
> 
> Hi,
> 
> Can anyone tell me how GEOS operates WRT intersections when geometries have a Z dimension? Are the intersections done in 2D instead of 3D? Does it depend on the geometry type? Is there any good documentation that explains this in detail?
> 
> Thanks,
> 
> -- 
> Andrew Bell
> andrew.bell.ia at gmail.com
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