1997—2003年广州市土地利用变化遥感监测研究及动态分析

分析了前人在土地利用研究中所用到的技术方法的基础上,利用广州市1997年和2003年的Landsat TM影像,在遥感和地理信息系统软件的支持下对广州市1997～2003年的土地利用/土地覆盖信息进行了提取并进行了统计分析,同时从土地利用变化的数量、速度、空间转移和区域差异等几个方面探讨广州市这6年来的土地利用变化规律以及其转化机理。通过本研究可以得出:(1)广州市1997～2003年间的土地利用变化状况处于一个平稳变化的阶段,其变化速度和强度都相对比较弱;(2)广州市各类土地利用类型变化存在着明显的区域差异,同时各类土地利用类型之间的转化强度不是很明显。

Monitoring land use and land cover change(1997-2003)of Guangzhou and discussing its dynamic mechanism based on TM data

In this paper,the classification process of land use in Guangzhou was described by using Landsat TM data between 1997 and 2003.After being geometrically corrected,subseted and enhanced,the images were classified into 9 classes as farmland,orchard,forest,disk-pond,urban and rural land,developing area,river,lake and unused land by using maximum likelihood classifier.The total classification accuracy was also reported in this paper.A mathematic method was used to analyze the change of land use by the conversion matrix of land use from 1997 to 2003,including the change-amount,the change-rate,the change-transition and the regional difference.Two important results were obtained by this research: (1) There was no significant change on land use of Guangzhou during 1997~2003;(2) a distinct difference was found on spatial distributing of land use of Guangzhou from 1997 to 2003.