deg2num                 Convert Degrees to Numeric
geodist                 Distance Between Geographic Coordinates
gmt                     Initialize GMT Session
gmt-package             Interface between the GMT Map-Making Software
                        and R
gmt.demo                GMT Example Data
gmt.system              Invoke shell command
num2deg                 Convert Numeric to Degrees
psbar                   Add Bars to GMT Mercator Map
psclose                 Finalize GMT Map
pscoast                 Draw GMT Map
pstext                  Add Text/Symbols to GMT Map
psxy                    Add Lines/Symbols to GMT Map
r2gmt                   Prepare Data for GMT
