基于人口离散化和交通网络分析的西安市城市公园绿地可达性研究与评价

Research and Evaluation of Accessibility of Xi'an City Park Green Space Based on Population Discretization and Transportation Network Analysis

本文基于西安市两景同期Landsat5和QuickBird卫星影像,在Erdas9.2、Envi4.2及ArcGIS9.2等软件的支持下,通过提取西安市土地利用信息、NDVI指数及MNDWI指数,对西安市第六次全国人口普查数据进行离散化处理,对研究区城市公园绿地的入口进行交通网络分析,研究西安市城市公园绿地的可达性,旨在为西安市城市绿地规划建设提供参考依据。研究结果表明:基于地表分类的人口离散方法更加简单合理;将人口离散化和交通网络分析相结合的研究方法,能够定量确定西安市城市公园绿地的服务人口和服务面积。

Based on the same period of Landsat5 TM and QuickBird images,this article extracted the land use information, NDVI and MNDWI index,discretizated the sixth national population census data of Xi’an city,then performed traffic network analysis using city park entrance data,and quantitatively studied the accessibility of city parks in Xi’an city supported by ERDAS9.2,ENVI4.2 and ArcGIS9.2 software,which is in order to research some feasible methods for the environmental monitoring part of national geographic conditions in Shaanxi Province.The results show that:the method of population discretion based on the surface classification is more simple and reasonable;the study based on population discretization and traffic network analysis can quantitatively determine service population and service area of the park green space in Xi’an.