基于GIS和RS的重庆市主城区NDBI分布特征研究

Study on NDBI Distribution Charateristics in Main District of Chongqing City Based on GIS and RS

利用RS技术快速、精确地获取监测城镇用地信息,有助于城市的合理规划及生态环境的保护。采用2002年、2007年、2010年Landsat TM遥感数据提取重庆主城区建筑指数(NDBI),获取重庆主城区建筑指数的数量结构与空间分布特征,并结合分形理论,对NDBI的分维数与稳定性进行研究。结果表明:2002—2010年低建筑区减少,高建筑区增加;在空间分布上,巴南区的建筑指数明显低于其他区域,九龙坡区以及渝北区的建筑指数相对较高;低建筑区的斑块复杂程度明显高于高建筑区,而高建筑区域的稳定性则高于低建筑区,主要是建设用地相对集中,斑块形状较为规整,从而受外界的干扰较小。研究结果为重庆市城市土地利用管理与城市生态保护提供参考。

RS technique was used to quickly and accurately obtain and monitor urban land-use information,which is helpful to rationally plan city and protect ecological environment.Chongqing Main City Zone Normalized Differences Built-up Index(NDBI)was extracted through the data sources including 2002,2007,2010 Landsat TM remote sensing data,and the quantitative structure and spatial distribution characteristic of Chongqing Main City Zone NDBI were obtained.The NDBI of fractal dimension and stability were studied based on fractal theory.The results indicated that the low building district was decreased and the high building district was increased from 2002 to 2010.With respect to spatial distribution,Banan district built-up index is lower than other districts obviously,Jiulongpo district and Yubei district built-up index are relatively high.The low building district of the patches′complexity is higher than the high building district,and the high building district of stability is higher than the low building district.It is mainly because that the construction land is relatively concentrated,and patch shape is more regular,little in external interference.The results offer reference for urban land utilization and management and the city ecology protection of Chongqing.