DEM地形可视性分析的统一模型构建与应用

Construction and Application of Uniform Analysis Model for Terrain Visibility Based on DEMs

地形可视性也称为地形通视性,主要包括通视性分析、可视域计算等方面,在国民经济、国防建设等领域具有重要的作用。基于DEM的地形可视性自动分析与制图方法的出现,开辟了地形可视性分析的新阶段。本文针对目前可视性分析研究大多着眼于具体问题的计算方法及效率研究,分析模型间的相关研究较少的缺憾,在分析可视性问题共性的基础上,根据可视性分析的视点集合、视线、目标点集合三个要素对可视性分析进行归类总结,构建了DEM地形可视性统一分析模型以及基于该模型的模式化可视性分析方法,并对该模型进行了应用实证研究。

The terrain visibility, which is also ealled as the ten＇ain inter-visibility, mainly includes the inter-visibility analysis between two points, viewshed analysis and so on. It plays an extremely vital role in the national economy, the national defense development as well as other scientific research domains. The appearance of DEM and the automated visibility analysis and mapping method based on DEM, pioneered the brand-new stage in terrain visibility analysis. But the present research mostly put more attention on the computational method and efficiency, less in analysis model and some correlative research. Aceording to the summarization about three essential factors of visibility analysis based on the commonness of all kinds of visibility problems, this paper establishes the uniform analysis model of DEM terrain visibility and the methods of patterning visibility analysis and exploits the prototype system of modellized visibility analysis. Finally, this paper carries out an empirical research on the uniform analysis model.