Some feedback for Mr. Ramsey to present to the OGC.

One of the major annoyances with the current CTS specs is the lack of detailed standards for trasformation and map projection names, parameters and parameter names. CTS 1.0 only gives information for a few projections and parameter names. Since the OGC names were inspired by the EPSG names and parameters, implementations usually need to rely on the EPSG names and parameters. Unfortunately because of some deficiencies with the EPSG names (mercator split into mercator_1sp and mercator_2sp, etc) other implementations have created their own names and parameters. For example, ESRI only uses Mercator (has a standard_parallel_1 parameter to allow for both cases) and also created Polar_Stereographic_North and Polar_Stereographic_South names (nicer than the EPSG's Polar_Stereographic with a latutude_of_origin parameter that can only be +-90 degrees).

It would be nice if the OGC, ISO, ESRI, Proj4, Geotools, Degree, and anyone else who is interested could get together to clearly specify transformation and map projection names and parameters. Also they should give some specific rules for naming new projections. It would also be very helpful if they could provide good references for the equations for each transformation/ projection. Most equations can be found in Snyders "Map Projections - a working manual", but not all. Other equations are in the EPSG guide book, but are usually not given in enough detail for a good implementaiton.

See http://66.96.18.170/~warmerda/projects/opengis/wktproblems.html and http://www.remotesensing.org/geotiff/proj_list/ for more about this problem.