[postgis-users] Support for 3D spatial filtering operations on 3D geometry instances

[Olivier Courtin]

On Feb 22, 2011, at 10:44 PM, Farrukh Najmi wrote:

> What plans if any exist in the roadmap to allow PostGIS to support  
> 3D geometries as filter geometry in 3D spatial filter operations  
> using functions like ST_Within etc.?
>
> My search seems to indicate no evidence of such plans:
>
> http://postgis.refractions.net/pipermail/postgis-devel/2006-March/002041.html
>
> Can someone from dev team please share any insights. Thanks.

There's no plan (right now) to support spatial functions and operators  
for 3D in PostGIS.

And mainly for theses reasons:
- The only specification who deal with such notions is still in draft  
stage (SQL/MM)
- GEOS (who handle topological operations) is 2D only
- Such features will need appropriate funding.

HTH,

--
Olivier