ADD: correlation coefficient colormaps #1485
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Hi @wx4stg thanks for the PR! We are currently moving colormaps including CVD friendly colormaps over to: Would you be willing to open the PR there instead? Cheers |
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ah! yes I do remember that now. sorry that totally slipped my mind. |
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This adds colormaps designed for correlation coefficient products:
pyart_NWS_CCwhich I reverse-engineered from AWIPS CAVE. Recommend vmin=0, vmax=1.05pyart_plasmidis, combination of matplotlib viridis and plasma_r that diverges and lightness at 0.95 if vmin=0 and vmax=1The motivation behind plasmidis is an attempt to be more CVD-friendly than NWS_CC by making the lightness reversal matter (0.95 is subjectively what I look for mixed ice and liquid targets, anything less probably suggests hail and much less suggests non-meteorological targets).
NWS_CC is provided for backwards compatibility/legacy/familiarity/etc.
Test data used: https://noaa-nexrad-level2.s3.amazonaws.com/2021/04/09/KGRK/KGRK20210409_015238_V06
As proven by our fun last year in #1325, y'all have much better cvd/colormap test suites than I, so let me know If I was successful or what can be improved :) The ulterior motivation behind this PR is that I'm doing research involving polarimetric products, and I didn't want to use the RefDiff cmap for ZDR and CC. This is just my first swing at it, improvements/suggestions welcomed and encouraged.