Hi all,

On 6 Oct 2005 at 17:08, Vitali Diatchkov wrote:

> Seems we are talking about one thing. That is good! 

Definitely. We're talking about the same thing, just with different 
words and perhaps focus. But we've got a lot of ideas and options to 
develop them!

As you said, and I do agree, we should think of a Topology Framework 
making abstraction from the underlying data / metadata model.

> Topology deals with geometries. But geometry can be just attribute of
> anything. So any entity that is somehow bound to geometry (or geometry
> is bound to entity) begins to be an entity for topological analysis.

> We can build TDM from set of geometries. OK. We have features. Do
> features have geometry as an attribute? Yes, they do. OK. We can build
> TDM from features....
> 
> Here WAS misunderstanding. Am I right...?

I think you are right. :o)

I'd add that you can build Topology solely from Geometries, but the 
most useful uses (applications) of Topology are with Features (or 
something attached to the userData of a Geometry). Maybe we should be 
able to navigate in the topology model either from a plain geometric 
perspective, or from a "feature" perspective.

Ok, I'm going to start a wiki page on the Topology Framework. Just an 
empty home in which we could put all the considerations done up to 
now, our use cases and so on.

Cheers

Sig



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