surface = new Array(1460);
for(z=0;z<1500;z++)
	surface[z] = 100;		// default median
for(z=235;z<245;z++)
	surface[z] = 110;
for(z=335;z<370;z++)
	surface[z] = 120;
for(z=600;z<775;z++)
	surface[z] = 263;		// gorge landing pad
for(z=1100;z<1140;z++)
	surface[z] = 120;
for(z=1460;z<1500;z++)
	surface[z] = 300;
for(z=600;z<650;z++)
	surface[z] = 150;		// inside gorge
for(z=755;z<770;z++)
	surface[z] = 160;
surface[658] = 200;
surface[663] = 225;
surface[670] = 250;
surface[705] = 250;
surface[717] = 225;
surface[745] = 200;
for(z=480;z<536;z++)
	surface[z] = 30;		// peaks
for(z=807;z<900;z++)
	surface[z] = 33;
surface[0] = 200;
surface[158] = 11;
surface[300] = 31;
surface[494] = 30;
surface[536] = 30;
surface[578] = 30;
surface[792] = 67;
surface[858] = 11;
surface[1008] = 11;
surface[1213] = 6;
surface[1260] = 30;
surface[1300] = 50;
surface[1450] = 80;