get_ghcn_inventory returns a SpatialPolygonsDataFrame of the GHCN stations within
the specified template. If template is not provided, returns the entire GHCN inventory.
get_ghcn_inventory(template = NULL, elements = NULL, raw.dir)A SpatialPolygonsDataFrame of the GHCN stations within
the specified template
A Raster* or Spatial* object to serve as a template for cropping.
A character vector of elements to extract. Common elements include 'tmin', 'tmax', and 'prcp'.
A character string indicating where raw downloaded files should be put. The directory will be created if missing.
Stations with multiple elements will have multiple points. This allows for easy mapping of stations by element availability.