R (>= 2.13), MASS, plotrix, sm, mapproj, celestial
grDevices, graphics, stats, celestial (>= 1.4.1), MASS,
plotrix, sm, mapproj, RColorBrewer
grDevices, graphics, stats, celestial (>= 1.4.1)
grDevices, graphics, stats, celestial (>= 1.4.1), MASS,
plotrix, sm, mapproj
grDevices, graphics, stats, celestial (>= 1.4.1), MASS,
plotrix, sm, mapproj, RColorBrewer, RANN
grDevices, graphics, stats, celestial (>= 1.4.1), MASS,
plotrix, sm, mapproj, RANN