作　　者： ; ; ; ;

机构地区： 广州地理研究所

出　　处： 《地理科学进展》 2010年第11期1433-1441,共9页

摘　　要： 以珠江三角洲地区为研究对象,利用1988、1998、2006年3个时相的建设用地解译数据,运用GIS空间分析手段,定量分析了地理区位因子对建设用地扩展的影响。结果表明,地理区位因子,包括离城市中心距离、离干线公路距离、离海岸线距离以及地形等因素会对建设用地扩展的方向、规模、强度等产生重要影响。地理区位因子对建设用地扩展具有明显的空间指向作用,受中心城市集聚与扩散作用以及交通可达性的影响,建设用地扩展围绕城市中心呈现距离递变规律,并向郊区、临路、临海以及平原区等优势区位集聚,从而使建设用地扩展表现出明显的空间指向性,即郊区指向、道路指向、海洋指向和平原区指向。 In this study,we use three scenes of Landsat Thematic Mapper（TM）images,including those of 1988, 1998 and 2006,to detect the expansion of construction land in the Pearl River Delta.And then we use the spatial analysis function of GIS to specify the impact of site factors on it,focusing on the effect of the landform and the distance from the city center,roads or coastlines.Firstly,we derived land cover maps from TM data by artificial visual interpretation method（AVIM）.Then,we overlaid the distribution maps of construction land with the topographic map and analyzed the pattern of construction land expansion in the buffer zones around urban centers or along main roads and coastline.The results show that the site factors,such as the landform and the distance from the city center,roads or coastline,indeed have a prominent influence on the expansion of the construction land.Due to the centralization and diffusion of the city center,the expansion of construction land reaches its peaks at two spheres surrounding the city center.The inner one represents the development of suburbs,indicating the spilling over of the city center and the rapid development of the suburbs,while the outer one manifests the development of the industrial zones and the construction of the satellite cities in the outer suburbs,showing the pattern of urban expansion like leapfrog.Thus,suburb is the preferred location for construction land development and the construc-tion land there expands most furiously,indicating the intense interaction between urban and rural areas and also reflecting the essence of the process of suburbanization in large cities.The influence of the distance from the roads or coastline reflects,in essence,the impact of the transportation accessibility on the expansion of construction land.From the quantitative analysis results,we can see the location close to roads or shoreline is the pre-ferred location for construction land development,resulting in the distribution pattern of the construction land gathering along the ro

关 键 词： 地理区位因子 建设用地扩展 珠江三角洲

领　　域： [天文地球] [天文地球]