set title "Gnuplot Correspondences\ngeographic coordinate system" unset key set xrange [-180:180] set yrange [-90:90] set yzeroaxis set xtics geographic set ytics geographic set format x "%D %E" set format y "%D %N" # # plot world map and correspondent locations as a + plot 'world.dat' with lines lc rgb "blue" , 'world.cor' with points lt 1 pt 2 |

# # plot a '3D version using spherical coordinate system' of the world. unset key set border set yzeroaxis set xtics set ytics set angles degrees set title "3D version using spherical coordinate system" set ticslevel 0 set view 70,40,0.8,1.2 set view equal xyz set mapping spherical set parametric set samples 32 set isosamples 9 set urange [-90:90] set vrange [0:360] splot cos(u)*cos(v),cos(u)*sin(v),sin(u) with lines lc rgb "cyan" ,\ 'world.dat' with lines lc rgb "blue" , 'world.cor' with points lt 1 pt 2 |

# HBB 20000715: new demo: # same plot, but with hidden3d active, plus axes through the # poles: set title "3D solid version with hidden line removal" set hidden3d offset 0 set arrow from 0,0,-1.2 to 0,0,1.2 lc rgb "cyan" lw 2 set arrow from -1.2, 0, 0 to 1.2, 0, 0 nohead lc rgb "cyan" lw 1 set arrow from 0, -1.2, 0 to 0, 1.2, 0 nohead lc rgb "cyan" lw 1 splot cos(u)*cos(v),-cos(u)*sin(v),sin(u) with lines lc rgb "cyan" ,\ 'world.dat' u 1:2:(1.001) with lines lc rgb "blue" , 'world.cor' with points lt 1 pt 2 |

unset arrow # # plot a '3D version using cylindrical coordinate system' of the world. set title "3D version using cylindrical coordinate system" set ticslevel 0.0 set view 70,40,0.8,1.2 set view equal xy set mapping cylindrical set parametric set samples 32 set isosamples 13 set urange [-180:180] set vrange [-90:90] splot cos(u),sin(u),v with lines lc rgb "cyan" ,\ 'world.dat' with lines lc rgb "blue" lw 2, 'world.cor' with points lt 1 pt 2 |