fixed problem with non-square DEMs in the far north
fixed problem with non-square DEMs in the far north

nakijun/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,nakijun/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp,seanisom/vtp