The Köppen–Geiger climate classification made simpler (I hope so)

[AzureWings]

I've been using the 8-category precipitation map. I've internally been trying to use temperature and precipitation values rather than categories whenever possible - the input data is quantized but I've been thinking I'll have the script use configurable color profiles for temperature and precipitation (so you could swap between different input color sets and categorizations without having to alter the actual script itself), so I want the core classification logic to be agnostic of the input data categories. As it stands now my script was set up for the 8-category precipitation data input.

Tried the piecewise aridity threshold function from the Kottek et al. paper Azélor linked and everything's super humid now (ex. Australia with no B climates at all), so I'm going back over my math again.

Edit: Ah, was missing the factor of 10 applied to the threshold. New output looks a bit better on the aridity all around - still seems a shade dry maybe but I think its an improvement over the continuous-threshold version:
earthTest12.png