基于语义认知的地形建模

Research of elevation modeling based on semantic cognition

针对当前地形建模注重渐变地形与地形几何特征(点、线)的表达,缺乏从整体形态上对地形的描述,该文提出将语义信息引入地形建模的方法。从地形建模的认知过程出发,引入"地形语义"描述地形的整体特征,剖析了地形语义的特点,实现了地形语义的形式化表达,设计了语义参与的建模流程,建立原型系统进行了实验。实验表明,地形语义信息作为数据源参与的地形建模能够保留一个地形区域的语义特征,提高了DEM的保真度,该方法进一步拓宽了地形建模数据源,为地形建模及其应用提供了新的思路与方法。

The research of terrain modeling has been paid more attention to the gradient terrain and geometrical characteristics,and lack of terrain local characteristics.In this paper,the research was started from terrain modeling′s cognition and a concept-terrain semantic was put forward.Terrain semantic′s characteristics was analyzed,some semantic′s formalization was realized,at last,aprototype system was built to get semantic DEM.The research showed that,the building with semantic data source can retain semantic characteristics of local area and increase DEM′s accuracy,so this paper can broaden the data source of DEM modeling and offer new ideas and ways of terrain analysis.