[postgis-users] Re: Polygon and north pole

Gregory Williamson Gregory.Williamson at digitalglobe.com
Tue Jul 17 16:14:03 PDT 2007

Paul --

> Jørn Vegard Røsnes wrote:
> > If I utilize the PostGIS transform function to transform the search polygon to 
> > a (polar) stereographic geometry (SRID 32661) and execute spatial queries to 
> > match the product geometries in (polar) stereographic.
> > 
> > Will PostGIS then use the "stereographic space", not the planar/Euclidean 
> > space?
> Yes, but that all your data that is *not* at the poles will be 
> problematic... certainly you won't be able to do two poles at once.  If 
> you have truly global data (few do, but you could be one of them) then a 
> truly global system is required.  We are proposing a "geography" type 
> for full geodetic support, but looking for funders as it is not a 
> trivial quantity of work.
> P

Paul --

Not being able to commit to anything, you understand -- far too low in the foodchain -- but if the money were to be forthcoming, do you have a rough estimate of how long it might take to deliver a Beta version of this ?


Greg W.

Greg Williamson
Senior DBA
GlobeXplorer LLC, a DigitalGlobe company

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