grdraster
: Extract subsets (subregion) from a binary raster and save as GMT grid. pscoast
: Create coastline maps. It uses GSHHG data. Figures were drawn using the Generic Mapping Tools (Wessel and Smith, 1998)
Wessel, P. and W.H.F. Smith (1998), New, improved version of the Generic Mapping Tools released, Eos Trans. AGU, 79, 579.