中文摘要：

提出了一种三维地理信息系统（GIS）中基于距离比的加权平均值方法以实现散乱点曲面拟合方法，利用任意点与已知点距离的两个极限位置，通过已知点的值得到任意点的值，该方法适用于由多个散乱点表示整个区域内数值分布的情况。此外，在获取任意点的值的基础上，提出利用划分网格和计算过渡颜色的方法生成曲面的方法，并给出了利用OpenGL生成曲面的代码。最后，通过实例验证了所提方法的实际效果，表明该方法调节过程平稳，曲面跟踪特性好。

英文摘要：

This paper presents a weighted average method based on distance ratio to achieve the scattered points surface fit- ting for three dimensional （3D） geographic information systems （GIS）. Using the extreme positions between the arbitrary point and the known point, the value of the arbitrary point can be calculated. This method can be applied to the multiple scattered points representing the distribution of the entire region. Based on this method, the paper discusses how to generate surface by generating grid and calculating the transitional colors, and provides the codes for generated surface using OpenGL. Finally, the actual effect diagram shows that the proposed method has stationary adjust procedure and the good tracing character.