矢栅一体化的三维地形可视化研究

A Research on the Displaying of Vector Data and Raster Data Contemporarily above the Three-Dimension Terrain

三维地形可视化是三维GIS中的一个重要功能。由于传统的地形可视化仅仅考虑了三维地形的真实显示,因此忽略了GIS中对空间数据的分析功能,文章探讨了适合在三维地形上矢量栅格数据一体化显示的方法,使用空间插值的方法在栅格纹理上叠加矢量图形。矢量数据的加入为在三维地形上进行空间分析提供了可能性。笔者将该方法应用于荆江地区的三维地形显示,取得了较好的效果。

The visualization of 3D terrain is an important function in 3D GIS.The traditional methods emphasis on the real displaying of 3D terrain and they ignore the analysis functions on the spatial data.This paper proposes a method that can display the raster data and vector data on the 3D terrain contemporarily and this method uses spatial interpolation to get the 3D vector data.The overlaying of the vector data above 3D terrain offers the data basis for the spatial data analysis.The author applies this method on the visualization of 3D terrain of Jingjiang regions and get a good effect.