基于多源遥感信息的城市边缘区空间测度与景观感知

The phenomenon of sprawling urban development is one of the major forces driving landscape pattern and function change in the China. With the rapid urbanization, urban sprawling creates both opportunity and conflict which are reflected in the distinctive land use of the rural-urban fringe. As the ecotone between urban area and countryside, urban fringe is both the two characteristics in spatial structural, evolution and geographic. Up to now, where is urban fringe and how to identify urban fringe, which is a big challenge in urban research and urban-rural planning. In this research proposal, we give the basic assumptions: urban fringe has land use diversity, complexity and transitional characteristics of landscape structure; from urban core area to countryside, POI density and impervious surface rate are on a downward trend. Based on multi-source remote sensing images points of interest (POI) from open web data, we try to identify and delineate urban fringes’ sites and scopes from different scale and perspectives. We have prepared this application with the following objectives: (a) to describe the state of urban sprawling spatial pattern quantification, (b) to identify and measure urban fringe by using the landscape information entropy, impervious surface and POI, (c) to discuss urban fringe landscape pattern-function changes integrated with landscape perception. We also attempt to construct a theory and methods system for urban fringe spatial measurement. This research results will provide the scientific basis and decisions for controlling built-up land disorder expansion and urban efficient governance.

城市边缘区是介于城市与乡村之间的过渡地带，作为城市化空间推进的前沿，其复杂多样的演变过程、空间结构与景观地理特征受到研究者与城市管理者的广泛重视，然而对城市边缘区位置与范围的界定一直存在较大的争议，缺乏有效的综合定量测度方法与评判标准。本研究针对这一科学问题，提出基本假设：城市边缘区土地利用景观结构具有多样性、复杂性和过渡性特征；从城市中心到外围乡村地域，不透水率和POI密度呈下降趋势。研究将基于多源遥感数据与互联网开放电子地图兴趣点（POI）信息，从不同尺度与视角开展城市边缘区的空间测度的理论与方法研究，并结合景观感知进行城市边缘区的景观格局-功能复杂性分析，探讨城市边缘区景观地理特征形成演变的空间过程与协同机制，尝试构建系统的城市边缘区空间识别测度的理论与方法体系，为深入开展城市边缘区景观生态与人居环境研究打下基础，为城市边缘区的规划管理提供科学依据。

城市边缘区具有城市与乡村之间诸多特性的过渡性、渐变性与动态性特征，并逐渐已成为城市空间中变化量最大、变化最迅速、最敏感的地带。本基金项目以以具有复杂自然地域结构与高强度人为干扰过程的珠三角城市群为研究对象，采用多源遥感对地观测信息和互联网大数据信息，展开的不同尺度的城市边缘区空间识别与测度，探索一套具有景观地理意义的城市边缘区空间识别方法体系，为进一步深入的城市空间分析、城市规划与管理提供科学支撑，并结合实地调查与认知分析探讨景观感知在城市边缘区的应用，将景观地理分析与景观感知有效结合，构建城市景观生态研究的新思路。.根据研究目标本项目开展并完成了以下几个方面的主要研究内容：珠三角城市群扩张的总体时空格局背景解析、城市边缘区的景观复杂性分析与空间识别、基于不透水面遥感信息的城市边缘区测度、应用互联网电子地图POI信息识别城市边缘区、城市边缘区景观感知分析与评价。.研究过程中发表核心期刊论文14篇、SCI论文18篇，培养博士生硕士生多名，申报发明专利2项，获得3项国家、省部级奖项。打造了一个具有一定影响的华南城市遥感与城市生态研究团队，有力推动了珠三角城市群的城市边缘区空间测度、感知及其景观格局综合分析，服务区域社会经济与生态安全。