一个高程数据贴上漂亮纹理的例子，左键点击在三角网与纹理图之间切换，而且随着鼠标移动，图形会自动移动。-Elevation data to affix a pretty example of texture, left click with the Nets in the triangular texture map to switch between, and along with mouse, graphics will automatically move.

use Triangular Map and image information to encrypt image