Load datasets found in the directory previously set with
setSpatialDataDir().
Only files matching pattern will be loaded.
Core datastes available for the package include:
TMWorldBorders -- high resolution country polygons (higher
resolution than SimpleCountries)
NaturalEarthAdm1 -- state/province polygons throughout the world
USCensusCounties -- county polygons in the United States
WorldTimezones -- high resolution timezone polygons (higher
resolution than SimpleTimezones)
These can be installed with installSpatialData().
loadSpatialData(pattern = "*")regular expression used to match filenames
Invisibly returns a vector of spatial dataset names loaded into the global environment.
setSpatialDataDir
installSpatialData