bes_g_cushman           Configurational entropy for surfaces
bes_g_gao               Boltzmann entropy of a landscape gradient
bes_m_cushman           Configurational entropy for landscape mosaics
bes_m_zhao              Zhao's entropy for landscape mosaics
bes_p_cushman           Configurational entropy for point patterns
get_distance            Calculates an average distance between non-NA
                        cells
get_slope               Calculate a slope
get_total_edge          Calculate total edge based on the input matrix
permute_raster          Permute values in the input raster
