期刊论文

A Head-Tail information break method oriented to multi-scale representation of polyline

Xiao, Jia(jiaxiao@mail.ccnu.edu.cn)

中文

测绘学报

1001-1595

2020

49

7

921-933

10.11947/j.AGCS.2020.20200004

The National Key Research and Development Program of China (No. 2017YFB0503500); The National Natural Science Foundation of China (No. 41531180); The Self-determined Research Funds of CCNU from the Colleges' Basic Research and Operation of MOE (No. CCNU30106190454); The Open Research Fund Program of Key Laboratory of Digital Mapping and Land Information Application Engineering of Ministry of Natural Resource (No. ZRZYBWD201909).

本校为第一且通讯机构

本文提出一种基于Head-Tail信息量分割的地理要素多尺度表达模型。首先通过傅里叶变换将地理线要素转换为傅里叶描述子,并通过香农信息熵理论计算其频域信息量。然后,按Head-Tail数据分布模式确定地理要素信息量的分界点,并设计函数对各个分界点所对应的傅里叶截断频率进行估计。最后,参考传统方根模型,建立以地理要素频率信息量为基础的信息方根模型,计算与各个地图层次相对应的关键尺度,实现地理要素的层次化多尺度表达。采用等高线及海岸线的数据试验表明,本文所提出的模型能够有效根据设定的比例尺对地理要素进行化简,对不同目标比例尺的简化结果体现出了良好的区分度与层次性。同时,在保证...

It is proposed that a multi-scale representation model of geographic polyline based on Head-Tail break of amount of information. Firstly, a geographic polyline is transformed into a Fourier shape descriptors, and the amount of information in frequency domain is defined using Shannon's information entropy theory. Secondly, Head-Tail breaks is introduced to determine the demarcation points of information content of the polyline, and a function is designed to estimate the Fourier truncating frequency corresponding to each demarcation point. Finall...