西安市典型区域城市生态单元空间格局研究

Study on the spatial pattern of urban biotopes in typical area of Xi'an City of China

综合利用遥感(RS)与地理信息系统(GIS)技术手段,选取西安市南郊城乡结合部为研究区,采用室内遥感影像判读、野外考察验证与室内机助制图相结合的方式,根据城市生态单元分类体系,在GIS的支持下建立了研究区城市生态单元数据库,并在此基础上,通过计算研究区城市生态单元的平均面积、形状指数、分形分维数、稳定性指数、Moran I指数这五项指数,对城市生态单元空间格局进行定量化研究。结果表明,城市生态单元主类斑块数量和斑块总面积基本保持正比例关系,形状指数和分形分维数之间、稳定性指数和Moran I指数之间均存在着正相关关系。

By use of the GIS and RS technologies, selecting the Urban Ministry of suburb in Xi＇an city as research area, and adopting the integrations of RS images indoor interpretation and outdoor investigation and indoor computer aided cartography, this paper built the spatial database of urban biotopes in research area based on GIS according to the classification system of urban biotopes. On the basis of this database, the paper carried out the research on the spatial pattern of urban biotopes, by calculating the below-mentioned five indexes of urban biotopes： average areas, shape index, fractal dimension, stability index, Moran I index. The results indicate that the quantities of main types blocks is in direct proportion to the total areas of them according to urban biotopes, both shape index and fractal dimension are provided with positive correlativity, so do both stability index and Moran I index.