用基于相对辐射校正的TM影像监测绍兴土地覆盖变化

Land Cover Change Monitoring in Shaoxing by Radiometric Calibrated TM Data

基于绍兴市 1984年和 1997年的两期TM影像 ,用相对辐射校正方法将 1997年的影像校正到 1984年的辐射水平上 ,消除多时相遥感影像间地物的辐射差异 ,对两期影像分别做最大似然分类 ,构建覆盖转移矩阵 ,将分类图分析运算构建覆盖变化分类混淆矩阵 ,并结合土地覆盖变化的驱动因子 ,分析得出 。

The present study was carried out with the help of two remotely sensed images acquired in 1984 and 1997 for Shaoxing city. At first, radiometric calibration of the image 1997 with respect to 1984 was done using relative radiometric calibration method. Then, a Maximum Likelihood Classification was applied for both images and the land cover change matrix prepared. Finally, after analyzing the classified maps, the land cover change classification confusion matrix was made. Combining with the driving factor of land cover change, we got the final result which indicates clearly that the land cover change in this area was mainly due to urban extension and change of food components.