构建三角网生成地形结构线的关键技术研究

Study on the Key Techniques of Generating Terrain Structural Line by Triangulated Network

地形结构线是更好地表示、反映和利用地形的基础。本文先介绍了构建三角网生成地形结构线的基本思路，然后对构建三角网过程中建立等高线树、地形结构线生成、鞍部山脊线自动生成和连接地形结构线并建立结构线树等关键技术进行了叙述。

The terrain structural line is the basis for rendering, representing and applying terrain. Firstly, the basic idea to generate the terrain structural line by triangulated network is introduced in this paper. After that, the key techniques to generate the terrain structural line are described, such as building contour tree, generating terrain structural line, auto-generating ridge of nek, linking terrain structural line and building structure tree.