CreateDistMatrix        Create a Distance Matrix Between Two Sp Objects
CreateGrid              Create a Regularly Spaced
                        SpatialPointsDataFrame
SpatialPosition         Spatial Position Package
contourStewart          Create a SpatialPolygonsDataFrame or a
                        SpatialLinesDataFrame from a Stewart Raster
huff                    Huff Catchment Areas
mcStewart               Stewart Potentials Parallel
plotHuff                Plot a Huff Raster
plotReilly              Plot a Reilly Raster
plotStewart             Plot a Stewart Raster
quickStewart            Create a SpatialPolygonsDataFrame of Potentials
                        Contours
rasterHuff              Create a Raster from a Huff
                        SpatialPointsDataFrame
rasterReilly            Create a Raster from a Reilly
                        SpatialPointsDataFrame
rasterStewart           Create a Raster from a Stewart
                        SpatialPointsDataFrame
rasterToContourPoly     Create a SpatialPolygonsDataFrame from a Raster
reilly                  Reilly Catchment Areas
smoothy                 Stewart Smooth
spatMask                Paris Perimeter
spatPts                 Public Hospitals
spatUnits               Spatial Units of Paris
stewart                 Stewart Potentials
