基于小波变换的武汉市城乡边缘带识别

马晶; 李全; 应玮

doi:10.13203/j.whugis20140053

基于小波变换的武汉市城乡边缘带识别

马晶^1,2,
李全^1,3,,
应玮¹

1.
武汉大学资源与环境科学学院, 湖北武汉, 430079;
2.
北京大学城市与环境学院, 地表过程分析与模拟教育部重点实验室, 北京, 100871;
3.
武汉大学地理信息系统教育部重点实验室, 湖北武汉, 430079

基金项目: 国家自然科学基金(71073116);国家基础科学人才培养基金(J1103409)。

详细信息

作者简介:
马晶,硕士,主要从事地学分析研究。Jing.ma@pku.edu.cn

通讯作者:
李全,博士,副教授。leequang@whu.edu.cn

中图分类号: P208
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出版历程
- 收稿日期: 2015-02-25
- 发布日期: 2016-02-04

Identification of a Rural-urban Fringe Based on Wavelet Transform-A Case Study of Wuhan

MA Jing^1,2,
LI Quan^1,3,,
YING Wei¹

1.
School of Resources and Environment Science, Wuhan University, Wuhan 430079, China;
2.
Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environment Sciences, Peking University, Beijing 100871, China;
3.
Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan 430079, China

Funds: The National Natural Science Foundation of China, No.71073116; the National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China, No. J1103409.

摘要

摘要: 对城乡边缘带的空间识别是城乡边缘带研究领域的热点。针对现有研究普遍存在的指标选取过于繁琐、大多采用阈值设置界定边界、以及对边缘带内、外边界分别提取等不足,在对土地利用程度综合指数与城乡边缘带的关系进行理论及样带分析的基础上,将小波变换方法引入城乡边缘带识别的研究中,以遥感影像为基础数据,选用土地利用程度综合指数定量评价土地利用程度,基于小波模极大值检测原理检测由综合指数数据序列变换得到的小波系数突变点群,依据突变点群的空间格局识别城乡边缘带内、外边界。以武汉市为例的实证研究表明,该提取方法严谨、高效。
- 城乡边缘带 /
- 土地利用程度综合指数 /
- 小波变换 /
- 突变检测
Abstract: The identification of the rural-urban fringe is a hotspot in the rural-urban fringe research field. However, fussy indictors,threshold value methods, and identifying fringe respectively are usually used according to existing research approaches. We however, introduced the wavelet transform method to identify rural-urban fringe through detect mutation point group of LUDCI values based on modulus maxima of wavelet transform, after an analysis of the relationship between land use degree comprehensive index(LUDCI)and rural-urban fringe. Along each profile from central city to suburb,the inner boundary of a rural-urban fringe is where a mutation point group appears, while the external boundary is where mutation point group disappears. Wuhan is experiencing rapid urbanization, and therefore were chosen to implement a case study. The db3 Daubechies wavelet function was selected as the mother wavelet, and wavelet transform was scale 3. The visualization of mutation point detection results were performed using ARCGIS.These case study results suggest that the two rural-urban fringe boundaries could be identified together. Our results show that this method is a stricter and more efficient approach for identifying rural-urban fringes than other methods.
- rural-urban fringe /
- land use degree comprehensive index model /
- wavelet transform /
- mutation detection

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