通过图面上的等高线 获取等高线之间的高程点 用于高程点加密（须有cass配合）-Contour through the surface between the contour lines for elevation point for the elevation point encryption (must have cass match)

输入TT,有图面高程加密，或者两高程加密，可以无限加密(Input TT, there are graph elevation, or two elevation, you can infinitely encrypt elevation points.)