real scale

While the large scale terrain simulation which is based on TIN DEM can describe complex terrain environment in detail,it is more difficult for it to construct models,render scenes in real time than the small scale terrain simulation which is based on Grid DEM.

大比例尺地形环境仿真以TIN DEM为基础,可精细描述复杂的地形环境,但是在建模、实时绘制以及应用等方面都较以Grid DEM为基础的中小比例尺地形环境仿真更为复杂。