NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

To learn about what's going on, see About the Archive Site.

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

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.

Ron Lake wrote:

Hi,

I think the idea that all CRSâ??s can be well know is a stretch.  One only
need to change the origin or make a rotation to create a new CRS.  I
think this problem is solved by having the service advertise the CRS
that it supports and use URNâ??s to identify the CRS.  A registry like
(http://www.epsg-registry.org) can then be used to resolve the URN
reference and get the CRS definition. 
Ron