Hello Jon
Le 24/03/10 17:46, John Caron a écrit :
Yes, correct. We are slowly adding ellipsoid support, but only after we
have a sample dataset that uses them. We are porting code from proj4,
its rather time-consuming to get it right.
if you have sample data where the ellipsoidal earth matters, send it
along, we'll get to it when we can. or, if you have resources and
expertise to port the proj4j code, i could send that to you and get you
started.
An alternative (while I admit that it has drawback) could be to use the
geotoolkit project (LGPL). It is a 2 Mb dependency, which I admit is rather big.
But for this price you get ellipsoidal projections (also a port of Proj4), datum
shifts (including NADCON grids used in USA), support for N-dimensional CRS,
"Well Known Text" parsing and formatting, capability to create a CRS from an
"authority code" (especially from the EPSG database, but also OGC URN), support
for ISO 19115-2 metadata ("imagery metadata") including XML parsing and
formatting, and more.
List of supported projections is there:
http://www.geotoolkit.org/apidocs/org/geotoolkit/referencing/operation/provider/package-summary.html
Since the project is splitted in modules, it is not required to use the whole
library. The only dependencies are Java 6, vecmath, GeoAPI interfaces and the
legacy JSR-275 (I may provide some way to allow users to replace this dependency
by the ucar.units package in the near future).
Just to let people known...
Regards,
Martin
