峡谷河道地形数据的不规则三角网构建优化

Optimization of TIN Construction for Terrain Data of Gorge River

针对金沙江河道狭窄多弯,突变点多,条带式分布的地形特点,对不规则三角网(TIN)进行了人工干预和优化,从而快速、合理、准确地生成等高线。结果表明,合理地确定边界值、适当地优化TIN能快速高效地实现典型峡谷河底地形DEM建模和等高线自动生成。

Aimed at the topographic features of the Jinsha River, we artificial intervened and optimized the triangulated irregular network(TIN) in this paper, so as to generate the contour lines rapidly, reasonably and accurately. The result shows that determining the grid width reasonably and optimizing TIN appropriately can realize the DEM modeling and automatic generation of contour in the typical gorge river quickly and efficiently.