NOAA-GSL / pygraf

ADB's Python graphics package
MIT License
10 stars 11 forks source link

use negative range and reversed colors for min hlcy #163

Closed cshartsough closed 2 years ago

cshartsough commented 2 years ago

Changes to defaults_specs.yml and specs.py to use negative range and a reversed color table for minimum helicity relative to max helicity.

Minimum helicity values are generally small and don't show in the field, however, David D. thought the range worked as a symmetry between max and min helicity graphics. May need to revisit the range later if others want to see more detail.

Passed linter.

Brian-Jamison commented 2 years ago

Good work, Craig! I agree with Christina's suggestions. In your explanation, you mention that min helicity values are "generally small", but when it was explained to me, the negative (i.e. "min") values can be as large as the positive (i.e. "max") values. Tornadoes can rotate clockwise in the Northern Hemisphere, though they are rare. I like keeping the scale as it is.