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Re: [galeon] How to map a parameterized projection to an EPSG code

John-

I attempt a response, but I am anything but an expert in CRSs. CRS
handling in WCS (which is based on GML 3.1 currently) is based on both
identification (via URIs) and explicit indication.

For the latter, a transformation can be indicated as part of a
coverage's spatiotemporal domain definition, see Table 13 of WCS 1.1.2
(OGC 07-067r5). A transformation provides georeferencing coordinate
transformation for unrectified coverage according to

CC_CoordinateOperation, see ISO 19111^


...in cases when the coverage is not given by a GridCRS - see WCS doc
for details.
I would like to think that such a transformation can do the trick for
your cases as well, but as said I'm not the expert in this.

Hope it helps, though,
Peter



John Caron wrote:

Hi Ron, Peter, et al:

I think what follows is the same issue that Aaron brings up, or at least a 
small part of it.

Our data typically uses CRS that are described by parameterized projection 
functions. eg, Lambert Conformal, with parameters lat/lon origin and two 
standard parallels. Thus there are an infinite number of possible CRS. Is there 
a way to map that into an EPSG code and/or form a URN?

apologies if this is obvious.