一种面向化简的海岸线弯曲识别与结构化表达方法

Simplification-Oriented Bends Recognition and Structured Representation of Coastline

海岸线弯曲识别与结构化表达是海岸线自动化简研究的基础。分析现有曲线弯曲识别与结构化表达方法用于海岸线化简中存在的问题;在通视分析相关理论基础上,面向海岸线化简应用,提出一种基于完全可视区间的层次弯曲渐进识别方法;根据弯曲间关系利用多叉树结构存储弯曲,实现海岸线结构化表达。通过对比实验,证明本文方法识别海岸线弯曲更加精细准确、层次性强,能更加细致地表现海岸线结构特点,也验证了本文方法适用于海岸线多尺度化简应用。

Coastline simplification is based on bends recognition and structured representation of the coastline.However,existing researches of curve bends recognition and structured representation are not fit for coastline simplification. Firstly,a new progressive and hierarchical coastline bends recognition method which is simplification-oriented is proposed for coastlines. The proposed method is based on the＂whole visible scope＂of visibility analysis.Secondly,coastlines are structured by multi-way trees storing bends recognized. Finally,compared with other methods,bends recognized using this method are more accurate and meticulous. Besides,the proposed method is more suitable for multi-scale simplification of coastline,which is verified through the other contrast experiment.