[MetaCRS] Testing framework available to any GeoAPI implementation

[Martin Davis]

Even better, why not provide these tests in the MetaCRS Test format?  That
way they are declarative, platform and API-independent, and hence more
easily usable by all the various CRS projects.

(I realize that this format hasnt got much traction beyond - ahem - Proj4J,
and I have my reservations about CSV as a format, but nevertheless it has
been presented and formalized and been proven in use).

Martin D2

On Mon, Aug 15, 2011 at 6:36 AM, Martin Desruisseaux <
martin.desruisseaux at geomatys.fr> wrote:

>  On a related topic with my previous email, there is some news on the
> "testing" front (a while ago we talked on this mailing list about a shared
> database for test points).
>
> The GeoAPI project provides a "geoapi-conformance" module which executes
> many JUnit tests on arbitrary implementations of the GeoAPI interfaces. I
> tried to make the test as implementation-independent as possible. For
> example the current implementation uses only the points provided in the
> "Example" sections of EPSG guidance notice, or the example points provided
> by some authoritative sources like the French National Mapping Agency (IGN)
> - they are not points calculated by a particular implementation.
>
> The tests are extensively documented, as you can see from here:
>
>    -
>    http://www.geoapi.org/geoapi-conformance/apidocs/org/opengis/test/referencing/MathTransformTest.html#testMercator1SP%28%29
>
>
> The tests are also customizable. If your implementation does not support
> the calculation of projection derivatives, and if you need to relax the
> tolerance threshold value, just override the test method as below:
>
> @Override
> public void testMercator1SP() throws FactoryException, TransformException {
>     isDerivativeSupported = false;  // MathTransform.derivative(...) not supported by our implementation.
>     tolerance = 0.1;                // Relax the tolerance threshold value from 1 cm to 10 cm.
>     super.testMercator1SP();
> }
>
>
> By creating GeoAPI wrappers for Proj.4 (see my previous post), Proj.4 win a
> new tests suite for free :-) (or maybe to be more realist, I should said
> that the tests suite win a validation from a well etablished library).
>
>     Regards,
>
>         Martin
>
>
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>
>
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