coast line map - 海岸線のみ入った白地図をつくる 

  使うコマンド  pscoast   psbasemap

sample map

bash スクリプト例
#  make coast line map

# parameter setting
region=130/145/25/35                    # map region east/west/south/north
proj=M10                                        # map projection and scale
frame=f1a5g5:.basemap:WSne      # boundary tick info and title
psfile=coastbasemap.ps                 # output postscript file name
#
gmt pscoast -R$region -J$proj -Di -Ggray -Wthin,black -K -V > $psfile
gmt psbasemap -R$region -J$proj -B$frame -O -V >> $psfile


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