Returns a SpatialPolygonsDataFrame for Public Health Districts for Washington, Oregon, Idaho, and California.
convertPHDs(nameOnly = FALSE)logical specifying whether to only return the name without creating the file
Name of the dataset being created.
A Public Health Districts shapefile is downloaded and converted to a
SpatialPolygonsDataFrame with additional columns of data. The resulting file will be created
in the spatial data directory which is set with setSpatialDataDir().
setSpatialDataDir