基于逆向加权Voronoi图的面状地理景观特征化研究

基于逆向加权Voronoi图的方法,采用角度、线宽、线长和方向四参数对面状地理景观进行特征化研究。实例表明,该方法既具备在保持曲线弯曲特征转折点精确性方面的优点,还在曲线化简时重点顾及了目标的形态维护,并在不损耗面状地理景观的方向、凹凸性及数量等关键信息的基础上,明显减少了数据存储量,还可实现面状目标的跨时段、跨地区比较,是一种记录、描述和可视化比较研究面状地理景观时空演化特征的有效方法,可实现特征信息保留与结果简化间的平衡。

Characterization of Area Landscape Based on Reversed Weighted Voronoi Diagram

In GIScience,the characterization of area landscape is the basis for describing the overall features and characteristics.The method of reversed weighted Voronoi diagram was introduced to solve the problem in this paper,which is generated from decomposing the Apollonius circle and the topological overlay of composing weighted Voronoi diagram.Based on it,the characterized result was recorded accurately and preserved in tabular form,and was described graphically and showed visually in the parameters of angle,thickness of line,length of line,and arrow direction.As it maintained the feature points and feature lines that included key inflexion information and embodied shape property respectively,so it could achieve a balance between the preserved information amount and the result simplification.