title "world.dat plotted with filledcurves"
no-xlabel
no-ylabel
axis-style left /decoration=major /also-axes=right,top,bottom
background-lines top Black /style Dots
background-lines left Black /style Dots
background "#afffff"
xrange -180:180 
yrange -70:80
text /split=true
plot 'world.dat#1##153' /color DarkGoldenrod /fill close