遥感技术在城市土地利用演变研究中的应用

Application of Remote Sensing Technologies in Urban Land Using Evolution

论述了采用遥感技术研究城市土地利用演变的必要性,然后从遥感数据的选择、工作原理、信息提取3个方面阐述了遥感技术在城市土地利用动态监测中的应用。根据武汉市1991、1995、2002年3个时相的Landsat TM图像和ETM+图像,利用GIS与RS信息获取技术、空间分析技术和数理统计方法,分析了研究区土地利用时空变化特征。

The application of remote sensing technologies in dynamic monitoring of urban land using evolution is introduced in detail from data choosing, work prineipium, information distilling of remote sensing. By using space analysis function of gengraphieal information systemic, through analyzing the extension model of Wuhan district on quantity and space structure the urban land using evolution was studied. The maps of urban sprawled area of Wuhan City between 1991 and 1995, 1995 and 2002 were obtained by using contrast method after classification and the urban extension map of principal component transformation form uhi-band from 1991 to 2002 were obtained by using principal component difference method, From the images include Landsat TM and ETM ＋ of Wuhan in 1991,1995 and 2002, based on the spatial analysis techniques supported by AreGIS and ERDAS software, the spatial-time change characteristics of land use in Wuhan were analyzed.