基于多源遥感信息的城市边缘区空间测度与景观感知

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。

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.