遥感信息 2015, 30(6) 102- DOI:   10.3969/j.issn.1000-3177.2015.  ISSN: 1000-3177 CN: 11-5443/P

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本文关键词相关文章
丽江市
城市空间扩展
外部形态演变
紧凑度
分形维数
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PubMed
丽江市空间扩展与外部形态演变
李敏敏|张增祥|赵晓丽|汪潇|刘芳
摘要: 由于我国缺乏中小城市的城市扩展研究以及需要对城市空间扩展与外部形态演变关系进行完善,选取长时间序列遥感影像,运用GIS空间分析方法,对丽江市建成区空间扩展和外部形态演变进行探讨。研究表明,丽江市建成区空间扩展具有明显的阶段性和各向异性;在所有研究时段,城市空间均以扇翼模式扩展,具体分为扇翼缓慢扩展型(扩展强度指数最大值<0.2)、扇翼快速扩展型(0.2<扩展强度指数最大值<2.4)和扇翼高速扩展型(扩展强度指数最大值>2.4)3种类型。丽江市建成区外部形态紧凑度指数变化范围为[0.232,0.349],总体呈缓慢下降趋势,城市内部连通性和集约性下降。外部形态的边界维数变化范围为[1.265,1.299],总体变化趋势为先震荡减小后缓慢增加,城市形态趋于复杂。城市空间扩展对城市外部形态演变的影响显著,城市空间加速扩展,则城市紧凑性水平降低,城市边界维数增大;反之,则城市紧凑性水平上升,城市边界维数减小。
关键词 丽江市   城市空间扩展   外部形态演变   紧凑度   分形维数  
Urban Spatial Expansion and External Morphology Evolution of Lijiang City
LI Minmin|ZHANG Zengxiang|ZHAO Xiaoli|WANG Xiao|LIU Fang
Abstract: This paper discusses urban space expansion and external morphological evolution of Lijiang city.Data from long time series of remote sensing images and GIS spatial analysis methods are used in analysis.Findings are listed as follows:(1) Urban spatial expansion is characterized by phase and anisotropy.(2) Builtup area expansion of Lijiang city belongs to fanshaped wings expansion pattern and can be summarized as three types,including slow fanshaped wings expansion pattern (the maximum of expansion intensity index is less than 0.2),rapid fanshaped wings expansion pattern (the maximum of expansion intensity index is greater than 0.2 and less than 2.4),and highspeed fanshaped wings expansion pattern (the maximum of expansion intensity index is greater than 2.4).(3) The compactness index is from 0.232 to 0.349 which has a slow downward trend in general,and this caused the decline of inner city in connectedness and intensiveness;the fractal dimension is from 1.265 to 1.299 which has an oscillating decreasing at first and then increasing slowly,and external morphology of the city is more complex.(4) The characteristics of urban spatial expansion have significant influences on evolution of urban external morphology.If urban expansion has an accelerated speed,the compactness would descend and fractal dimension would increase;on the contrary,the compactness would rise and fractal dimension would reduce.
Keywords: Lijiang city   urban spatial expansion   external morphological evolution   compactness   fractal dimension  
收稿日期 2014-12-09 修回日期 2015-03-23 网络版发布日期 2015-12-14 
DOI: 10.3969/j.issn.1000-3177.2015.
基金项目:

中国科学院遥感与数字地球研究所“一三五规划项目”(Y4SG0100CX)。

通讯作者:
作者简介: 李敏敏(1988—)|女|博士研究生|研究方向为国土资源遥感|目前主要从事城市扩展遥感监测和海岸带土地利用变化研究。E-mail:limm@radi.ac.cn
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