[postgis-users] AddGeometryColumn dimension property

[Rob Agar]

Brent Wood wrote:
> It's the number of coordinates at each vertex. Typically 2 for XY data, but
> three for XYZ data.

ah, so a POINT does not necessarily have just two coordinates, but can 
be a point in any dimensional space?  I get it now, thanks Brent.

btw, is there a (concise) reference list of the geometrical data types? 
  I don't seem to be able to find one via google.

cheers
Rob