R-script to calculate climate parameter indices for species based on their distribution.
Run climate_parameter_index() with the decimal latitude and longitude of the species occurrence data and a 43200x21600 raster file such as the WorldClim 30s rasters.
Run gbif_climate_parameter_index() with the GBIF taxonKeys and 43200x21600 raster files such as the WorldClim 30s rasters.
See
Sparrius, L. B., van den Top, G. G., & van Swaay, C. A. M. (2018). An approach to calculate a species temperature index for flora based on open data. Gorteria Dutch Botanical Archives, 40(1), 73-78.
for an explanation of the method.