基于高分辨率遥感影像的土地利用变化监测

Land Use Change Survey Based on High-Resolution Remote Sensing Image

利用遥感影像进行土地利用变化监测,在国内已经有众多相关应用的尝试。但是受到遥感影像分辨率的影响,能满足1∶1万土地利用变化的应用还较少。以浙江省湖州市东林镇域内一块试验区为例,阐述了利用SPOT5高分辨率遥感影像进行1∶1万土地利用变化的方法、过程,同时给出了实验结果,进行了该应用的可行性讨论。

It was impossible to survey land use change at 1:10000 scale before the appearance of high-resolution remote sensing image. With the launching of SPOT5, 2.5 meter high-resolution remote sensing image can be used. Furthermore, different remote sensing image fusion of the same area could be used to enrich the information about the interested areas, thus more accurate classification could be achieved. At present image fusion had some basic methods to be discussed on remote sensing section: PCA, HIS, Brovey, and so on. In this paper PCA and HIS methods of image fusion were discussed for surveying land use change at 1∶10 000 scale. At the same time, it showed the process and the combination of different image fusion methods that how to make 1∶10 000 scale land use change survey by testing a case. At last, it showed that this method or this application combination of fusion method led to better surveying area accuracy compared with other methods. So the results of this test showed the possibility of using SPOT5 2.5 meter high-resolution image to land use change survey at 1∶10 000 scale. Besides, this application combination of fusion methods will be beneficial to rational selection of methods used in surveying land use change.