# set terminal pngcairo  background "#ffffff" enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'world.1.png'
set ydata geographic
set xdata geographic
set format x "%D %E"
set format y "%D %N"
unset key
set style data lines
set yzeroaxis linetype 0 linewidth 1.000
set title "Gnuplot Correspondences\ngeographic coordinate system" 
set xrange [ -180.000 : 180.000 ] noreverse nowriteback
set yrange [ -90.0000 : 90.0000 ] noreverse nowriteback
plot 'world.dat' with lines lc rgb "blue" , 'world.cor' with points lt 1 pt 2