Anselm Hook wrote:
> Can GML express multiple instances of geometry?
Anselm,
Yes, it can. Few have accused GML if not providing enough options.
> I would like to express a city building and have multiple instances
of that
> building at different orientations and positions.
Well, I'm not sure exactly what you mean here.
Clarifying this is important to me because I feel it points out
problems in the OGC. The limits in the grammars they invent are
affecting how people think.
In VRML one can describe a geometry and then place more than one copy
of that geometry at different places in the 3 dimensional space.
Anselm,
I must take back my earlier statement. I thought you meant a feature with
multiple associated geometries. A classic example is where the road feature
has a curbs geometry and a center-line geometry - each suitable for
representing the road in different circumstances.
I see what you want is to have a complex geometry, and then place transformed
copies of it in a variety of places. I am not aware of a way to do this
with GML such that GML is actually expressing what is going on rather than
it being completely up to the application to understand about the replication.
I will concede that for folks coming from a GIS background, your wish seems
bizarre and not something I would ever think to explicitly support in a format.
But I don't see this as a standards problem, so much as as a viewpoint
difference based on different approaches and backgrounds.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo, http://osgeo.org
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