Describe the New Feature

As discussed during the HAFS project meeting on Jan 27, 2025 (see meeting notes), the MET statistics tools should be enhanced to read the range/azimuth grid output written by the TC-RMW and RMW-Analysis tools.

This requires adding range/azimuth as a new "projection type" to be supported. Generally, we could treat range as the "x" dimension and azimuth as the "y" dimension. The goals are:

• enable Grid-Stat to compare R-A data on the same grid
• enable Point-Stat to interpolate points to the R-A grid

Acceptance Testing

Development tasks:

• Enhance the vx_grid and vx_data2d_nc_met libraries to support the TcrmwGrid directly. DONE as of 2/27/25.
• Fix some SonarQube code smells in these libraries to drive the overall number down.
• Consider renaming TcrmwGrid as RngAziGrid since its a range/azimuth grid that may or may not be defined relative to the radius of maximum winds.
• Confirm that regridding from lat/lon to range/azimuth and then back to lat/lon produces sane results. DONE (see this comment) as of 2/27/25.
• Add unit test for plot_data_plane (without plotting map data since that doesn't work well).
• Add unit test for grid_stat that uses auto-regridding (e.g. to_grid = FCST) to verify a range/azimuth forecast.
• Add unit test for point_stat

Migrated additional work to a new #3096 issue.

Time Estimate

Estimate the amount of work required here.
Issues should represent approximately 1 to 3 days of work.

Sub-Issues

Consider breaking the new feature down into sub-issues.

Relevant Deadlines

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Funding Source

2783604 2025 NOAA R2O HAFS

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Define Related Issue(s)

Consider the impact to the other METplus components.

• METplus, MET, METdataio, METviewer, METexpress, METcalcpy, METplotpy
  None expected.

New Feature Checklist

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