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Subject: RE: [emergency] Circle and Polygon
Having taken a look at the referenced documents:
1. By claiming geography, GML claims geometry. I am
curious why you say this is not a mapping application.
It appears to be the geometric component which
can then be mixed via namespaces with other components,
but the primary application is mapping for information
management purposes. It is clearly GIS. It is not
the whole story on geometry.
2. GML application languages incorporate GML geometry.
Are they free to incorporate geometry from other vector
formats?
The problem here is that not all elements that are spatio-temporal
and application specific are best described by this model. I
recognize the XML means and that is sound. However, the issues
of object-model behavioral fidelity and rendering fidelity are
not addressed AFAICT. Where GML is an excellent basis for
GIS, GIS is not the whole story of spatial management because
the most important aspects of distributed simulation are not
described.
So there is a case to be made for X3D systems that reuse GML
information. I suspect however, there will be clashes in the
object model fidelity as rendered into the simulation systems.
It seems odd that the OGC works with SVG yet does not work
with X3D given that the other important standards (XSBC,
XMSF) work with X3D. What is the story for the use of GML
in real-time distributed simulation and visualization of
real world objects?
len
From: Carl Reed OGC [mailto:creed@opengeospatial.org]
Claude -
GML is not a mapping standard! GML is a standard, grounded in a variety of
ISO 19*** series standards, for
encoding/expressing/communicating/transporting
geographic/location/geospatially enabled content. Now, in terms of 3D, I
would strongly encourage you to check out LandGML
(http://www.transxml.org/GML+Experiment/Resources/261.aspx and
(http://www.opengeospatial.org/initiatives/?iid=133) and CityGML
(http://www.ikg.uni-bonn.de/sig3d/docs/Gi4Dm_2005_Kolbe_Groeger.pdf), both
application profiles of GML 3.1.
In terms of SVG, there are any number of tools that do GML to SVG for
rendering. Some are free, some are for fee.
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