A Collaborative Simplification Method for Multiple Coastlines Based on the Hierarchical Triangulation Network Partition  

作　　者：Lihua ZHANG Lulu TANG Shuaidong JIA Zeyuan DAI 

机构地区：[1]Department of Military Oceanography and Hydrography&Cartography,Dalian Naval Academy,Dalian 116018,China

出　　处：《Journal of Geodesy and Geoinformation Science》2020年第2期93-104,共12页测绘学报（英文版）

基　　金：National Natural Science Foundation of China(Nos.41871369,41901320,41471380)。

摘　　要：For the current automatic coastline generalization method,only one-line element is considered separately,but the relationship between the nearby elements is not effectively considered.A synergistic simplification method for multiple coastlines based on the hierarchical triangulation network partition(HTNP)is proposed in this paper.Firstly,the constrained Delaunay triangulation is constructed to partition the regions that can be simplified.Then,a hierarchical binary tree model to structure the morphological characteristics of the above several coastlines and the spatial proximity between different coastlines is constructed.Finally,the small curved and curved invisible parts of the coastline are deleted according to the visual constraints,and the narrow part between the coastline itself or the different coastlines is exaggerated appropriately,and the automatic simplification of the coastline is realized.The experimental results show that:①Relationships between the different coastlines are considered,and the shortcomings of considering the coastline separately are overcome;②Under the condition of the multiple coastlines in complex sea areas,the problem of collaborative simplification is solved,the quality of the coastlines are improved obviously,and the proposed method can be applied into more types of coastlines.

关 键 词：cartographic generalization coastline simplification hierarchy relationship synergistic simplification 

分 类 号：P229[天文地球—大地测量学与测量工程] P283.1[天文地球—测绘科学与技术]