cdm-radial: fix for sigmet volume scan

[michaeldiener]

Description of Changes

cdm-radial: fix for sigmet volume scan.
Before there were issues with some files from IDEAM Colombia.

PR Checklist

• Link to any issues that the PR addresses
• Add labels
• Open as a draft PR
  until ready for review
• Make sure GitHub tests pass
• Mark PR as "Ready for Review"

[lesserwhirls]

Thank you for your contribution! I'd like to get some tests in place to make sure the fixes are covered in the future. If you have a small (<200 KiB or so) sample file, it can be included in the git repository and the tests can live under cdm/radial/src/test/java/ucar/nc2/iosp/sigmet - this setup would run the test against each PR. If the file is larger, we could include it in our test datasets, which are used to run our nightly integration testing. The test would need to be annotated with @Category(NeedsCdmUnitTest.class), and the path to the test dataset would need to be updated to reflect the sample files final location within our test dataset filesystem layout (I can do that, if you write the tests with a bogus path that could be updated by me in a separate PR).

[michaeldiener]

The test file that I have is 387.1 kB.
I don't own the copyright, but it is Creative Commons Attribution 4.0 International - not sure this is compatible with test datasets.

Please advise on how to proceed.

[lesserwhirls]

CC 4.0 Attribution International will work just fine. I think the size is ok to include in the repo, which is a bit nicer since the test will run against every PR. What we'd want is for the file to live under:

cdm/radial/src/test/data/sigmet

and along side of it, create a README file that references the file name and provides the attribution details following the the requirements laid out by the license. I believe this is the license, but you'd want to confirm that. If that is the license, this is what is required:

Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

Your test code can live under cdm/radial/src/test/java/ucar/nc2/iosp/sigmet, and you can access the test file using the path TestDir.localTestDataDir + "sigmet/<test-file-name>";. Note that the existing test in that directory requires access to our large test datasets, so it is annotated with @Category(NeedsCdmUnitTest.class) - your test will not use that annotation since the test file will live in the repository :-)

Thank you again!