# invoke as
# gnuplot -e "terrain_file='<terrain filename>';obstacles_file='obstacles filename'" terrain_obstacles.gp

set nokey
set view 69,261,1,1
unset colorbox
set pointsize 0.5
set style line 50 lt 2 lc rgb "white" lw 2 
set border ls 50
set object 1 rectangle from screen 0,0 to screen 1,1 fillcolor rgb"#000000" behind
set xlabel "X" textcolor rgb"#ffffff"
set ylabel "Y" textcolor rgb"#ffffff"
set zlabel "Z" textcolor rgb"#ffffff"
set ylabel "Y" 
set zlabel "Z"
splot terrain_file with points pt 7 lw 10 lt 2, obstacles_file using 1:2:3:4 w l lw 5 palette

pause -1