Hello all
During the OGC meeting in Rome this week, a proof of concept of what may
be CRS-JSON (for discussion purposes only, not an approved standard) has
been demonstrated. In order to show that the CRS-JSON prototype works
with different implementations, GeoAPI wrappers for GeoTools have been
created. Those wrappers allow GeoTools users to view the metadata and
referencing services as a GeoAPI implementation. Doing so provide the
following benefits:
* For peoples who were using GeoTools before the package renaming to
"org.geotools.api", it allows them to continue to use the
"org.opengis" package names, but this time compliant with the OGC
standard.
* It allows to use GeoTools with the above-cited CRS-JSON prototype
(demonstrated at the OGC meeting this week) and with GIGS tests.
* It allows users to switch more easily between implementations
(currently Apache SIS, GeoTools and PROJ) as they need.
The wrappers are bidirectional: users can view GeoTools objects as
GeoAPI objects, or the converse. The converse should, in theory, allows
to use alternative implementations such as Apache SIS and PROJ inside
GeoTools. However, I didn't tested.
I tried to make the wrappers as complete as I could. It covers pretty
much all the GeoTools API that I could map to GeoAPI. The wrappers
include the factories. In particular, the two following methods are
available, but returning the GeoTools factories viewed as GeoAPI factories:
* CRS.getAuthorityFactory(longitudeFirst)
* CRS.getCoordinateOperationFactory(lenient)
The project is there: https://github.com/Geomatys/geoapi-gt-wrappers
The JAR file has not yet been deployed on a Maven repository, but we may
deploy it to https://maven.geotoolkit.org/ (waiting first to see if
there is feedbacks). A better location would be the OSGeo repository,
but OSGeo declined a few months ago a proposal to have this project
hosted in their foundation. If a volunteer is willing to ask again
later, I would be happy to transfer the ownership to OSGeo, including
the copyright if desired.
Martin
