[Proj] rHEALPix bug & bug fix

[Michael Speth]

Greetings,
   We have discovered a bug in the rHEALPix projection that causes lon/lat's in the polar regions to be incorrectly projected if the polar regions are shifted.  I have written detailed documentation on the bug, so please reference this for more information.  I have created a patch that fixes the bug as well as provides the test plan and supporting source.  I have also made available the binaries for running the tests for the HEALPix and rHEALPix projections (64-bit).  To test the bug, I've included the source to a standalone C application with an included script that should compile on a 32-bit or 64-bit system.

Links
Patch: https://df.bestgrid.org/quickshare/cae33e5e7caf3955/combine_caps_bug-2012-06-06.patch
Bug Documentation: https://df.bestgrid.org/quickshare/5c677519931baa0e/SCENZ-CombineCaps-2012-06-07.pdf
Testing Documentation: https://df.bestgrid.org/quickshare/d6b285865b34db70/SCENZ-ProjectionTests-2012-06-07.pdf
Test Binaries: https://df.bestgrid.org/quickshare/7364e5e560b6d60d/jproj4-test.tar.bz2
Test Source: https://df.bestgrid.org/quickshare/3ad729a5bf29e17a/jproj4-test-src.tar.bz2

Please let me know if there are any questions or problems.  What is the process for adding bug fixes to the main line?

--
Michael Speth
Research Systems Developer
Landcare Research

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