set pm3d  interpolate ii,ii map
set style data pm3d
#set palette defined ( 0 "dark-blue", 1 "blue", 1.7 "green", 2.5 "yellow", 2.6 "yellow", 4 "red", 5 "dark-red" )
set style line 9 linecolor rgb "black" pt 7 ps 0.5 
splot 'fort.68' using 1:2:3:3 t 'Analysis and data location','fort.99' using 1:2:3:3 with  points ls 9 notitle
#set palette rgbformulae 33,13,10