The article build the mathematic model of terrain surface with the nonlinear insert calculation using the distance entropy function as the insert calculation function in terrain surface fitting and deal the visualization with grid method 采用非线性插值方法，用距离熵函数作为地表曲面拟合的插值函数，构造地表曲面的数学模型，并采用规则格网法进行表面剖分，最终实现地形的三维可视化效果。
