A raster with principal components derived by a principal component analysis based on climatic (from Chelsa: chelsa-climate.org) and edaphic (from SoilGrids: soilgrids.org) variables.
Examples
if (FALSE) {
require(terra)
envar <- system.file("external/cretusa_predictors.tif", package = "adm")
envar <- terra::rast(envar)
plot(envar)
}