MSA                     Selects one MSA from a given state.
MSAfips                 MSA FIPS codes
MSAnames                MSA Names and FIPS codes
UScensus2000-package    Helper functions for the UScensus2000-suite of
                        packages
areaPoly                Area of the polygons in
                        SpatialPolygonsDataFrame
city                    Selects one or more CDP(s) from a given state
county                  Selects one or more counties in a given state
countyfips              County FIPS codes
demographics            Selects a specified demographic meta-data from
                        the sp objects.
poly.clipper            Selects the block, block group, or tracts which
                        are contained within a given CDP.
states.names            States Names
states.names.cap        States Names Capitalized
