[postgis-users] Support for 3D spatial filtering operations on3D geometry instances

[Paragon Corporation]

Farrukh,
We do have some  3D spatial relationship functions implemented.  I haven't
played with them too much yet so feel free to and report issues.

Or are you not talking about these.  Right now we do have ST_3DDWithin,
ST_3DIntersects etc thouggh it's not quite the same as the filtering
ST_Within, ST_Contains and currently piggy backs on a 2D index instead of a
3D index.  We hope to have 3D spatial index implemented before PostGIS 2.0
release, but that is not a promise. 

These do work with all 3D geometries (except for TINS)  we have thus far.

Nickllas can correct me if I misspoke.  

Please refer to the documentation if you haven't already
http://www.postgis.org/documentation/manual-svn/reference.html#Spatial_Relat
ionships_Measurements

Thanks,
Regina

 

-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Olivier
Courtin
Sent: Tuesday, February 22, 2011 5:42 PM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] Support for 3D spatial filtering operations
on3D geometry instances


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/0020
> 41.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




_______________________________________________
postgis-users mailing list
postgis-users at postgis.refractions.net
http://postgis.refractions.net/mailman/listinfo/postgis-users