Hi Cesar,
sure, it seems like a nice addition.

Just in case you have not found these already, here are the contribution
guides:
http://docs.geotools.org/latest/developer/procedures/contribute.html
https://github.com/geotools/geotools/blob/master/CONTRIBUTING.md

If you have any questions, ask away :-)

Cheers
Andrea


On Fri, Feb 23, 2018 at 3:24 PM, César Martínez Izquierdo <
cesar....@gmail.com> wrote:

> Hi,
>
> We are evaluating using Geotools as the basis for our CRS management
> libraries on gvSIG project (a desktop, Java-based GIS application).
>
> We have performed some tests to ensure we can implement all our
> current use-cases using Geotools. Most of them can be easily
> implemented, but I don't find an evident way to list available
> operations to convert/transform between two CRSs (when more than one
> operation is available on the EPSG database).
>
> I am aware it is possible to use CRS.findOperation(source, target) to
> get "the preferred operation", but in this way we can't offer the
> users the possibility to choose the transformation themselves.
>
> Ideally, I would expect a method like:
> Set<CoordinateOperation> ops = CRS.findOperations(source, target);
>
> which would mean adding a new method in CoordinateOperationFactory:
>
> Set<CoordinateOperation> listOperations(sourceCRS, targetCRS)
>
> I believe it would be quite simple to add this method in
> CoordinateOperationFactory. As far as I've seen, it would need some
> changes in DefaultCoordinateOperationFactory,
> BufferedCoordinateOperationFactory and AuthorityBackedFactory, but
> they are mostly method additions and some code refactoring.
>
> We are wondering if you would accept this contribution, as it is
> currently the main blocker for going forward.
>
> Best regards,
>
> César Martínez Izquierdo
>
>
>
>
> --
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>    César Martínez Izquierdo
>    GIS developer
>    -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
>    SCOLAB: http://www.scolab.es
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>
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>



-- 

Regards,

Andrea Aime

==
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==

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
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