set output 'map_c.ps' 
set term postscript color enhanced 'Helvetica,18' size 10,10  
set style line 1 lt rgb 'red' lw 3  
set style line 2 lt rgb 'green' lw 3  
set style line 3 lt rgb 'blue' lw 3  
set style line 4 lt rgb 'cyan' lw 3  
set style line 5 lt rgb 'violet' lw 3  
set grid 
set key bot left 
set size square 
set ylabel 'Y'  
set xlabel 'X' 
plot [0:20][0:20] 'make_map_c.out' using 1:2:3 with image t ''  
set output 
quit 
