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<p>Hello Filip</p>
<p class="western" lang="en-GB">The International Association of
Oil & Gas Producers (IOGP), the group which create and
maintain the EPSG database, created the Geospatial Integrity of
Geoscience Software (GIGS) test suite. By coincidence they just
released version 2 this week: <a class="moz-txt-link-freetext" href="https://gigs.iogp.org/">https://gigs.iogp.org/</a><br>
</p>
<p class="western" lang="en-GB">The GIGS version 2 tests are
published as a set CSV files (this is a change compared to
version 1, which was published as Microsoft Excel files). Those
tests are partially implemented in a separated project which use
GeoAPI [1] interfaces for executing those tests. GeoAPI is in
Java, but can be executed with PROJ using PROJ-JNI [2]. Actually
a branch of PROJ-JNI already execute part of the GIGS tests. I
believe that there is also some C/C++ code for executing some
GIGS tests in PROJ code base. The tests using GeoAPI has the
advantage of being executable on different implementations,
which allow comparisons. The Java code for the tests is at [3],
but there is discussion for transferring this test suite to IOGP
if they are interested.</p>
<p class="western" lang="en-GB">Note sure if it help, but just for
information,<br>
</p>
<p class="western" lang="en-GB"> Martin<br>
</p>
<pre class="western" lang="en-GB">[1] <a class="moz-txt-link-freetext" href="http://www.geoapi.org/">http://www.geoapi.org/</a>
[2] <a class="moz-txt-link-freetext" href="https://github.com/OSGeo/PROJ-JNI">https://github.com/OSGeo/PROJ-JNI</a>
[3] <a class="moz-txt-link-freetext" href="https://github.com/desruisseaux/GIGS">https://github.com/desruisseaux/GIGS</a>
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<p>Le 26/11/2021 à 16:35, wcd a écrit :</p>
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<div dir="ltr">Hello,<br>
I would like to develop a test suite around my coordinate
transformation provider which uses PROJ. The test suite should
provide a reference so when I update say the proj version or
some parameters in the future, I can still be sure I get the
same results as before.<br>
<br>
I am looking for some test data for this purpose. Perhaps I
could generate some lat lon grids within area of interest of
each coordinate system and project these grids to obtain the
reference data. And I could do something similar to obtain
reference data for different datum transformations too.<br>
<br>
I wonder if somebody has done this kind of thing before. Do you
have a better idea? Are there any standard datasets that proj or
other libraries are tested against?<br>
<br>
Many thanks for any input.<br>
Filip.<br>
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