Martin Desruisseaux ha scritto: > Andrea Aime a écrit : >> The issue is, they do >> use projection identifiers that do not conform to the >> EPSG database. For example, 3005, British Columbia equal area, >> has the following projection identifier "British Columbia Albers (EPSG >> OP 19984)" whilst the correct one is "Albers Equal Area". > > It took me a while to come back on this issue. I just tried: > > java org.geotools.referencing.CRS EPSG:19984 > > and got > > DefiningConversion["British Columbia Albers", > METHOD["Albers Equal Area", AUTHORITY["EPSG","9822"]], > PARAMETER["semi_major", �], > PARAMETER["semi_minor", �], > PARAMETER["central_meridian", -126.0], > PARAMETER["latitude_of_origin", 45.0], > PARAMETER["standard_parallel_1", 50.0], > PARAMETER["false_easting", 1000000.0], > PARAMETER["false_northing", 0.0], > PARAMETER["standard_parallel_2", 58.5], > AUTHORITY["EPSG","19984"]] > > > According this WKT, "British Columbia Albers" is the name of the operation > itself, not the name of the operation *method*, which is "Albers Equal > Area"... > >> The last hope is that 19984 could be used to inspect an EPSG database >> (the hsql one) and come up with the real projection name. >> Martin, is this possible? > > This is doable, but introducing a dependencies of WKT parser to the EPSG > database would make the referencing module a little bit more convolved... > > We can isolate the EPSG database dependencies in a > "OracleMathTransformFactory" > which would wraps the "DefaultMathTransformFactory", inspect the operation > name > for a "(EPSG OP XXXX)" label and substitute the name before to delegate to > DefaultMathTransformFactory. One more indirection level in the referencing > module factories!
Oh hum, was looking at this again, and wondering.... could the plain name substitution be performed in the wkt parser directly? I mean, we are already bending it to support the Oracle broken Bursa-Wolf parameters spec. Cheers Andrea ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
