Selects the map projection. More details can be found in the psbasemap man pages. No space between the option flag and the associated argu ments.
Sets map boundary tickmark intervals.
See psbasemap for details. Use cptfile to assign colors based on vector length. Append m for minutes or c for seconds. Append r if lower left and upper right map coordi nates are given instead of wesn. Specify a subset of the grid.