应用IKONOS卫星遥感图像监测南麂列岛土地覆盖状况

采用具有1 m空间分辨率的IKONOS卫星数据,以南麂列岛为例开展了土地覆盖的监测研究。主要论述了几何校正、彩色合成和数据融合等遥感数据处理方法,然后采用监督分类法、阈值法、植被指数法和人机交互法相结合的方法进行了土地覆盖分类,获得了南麂列岛土地覆盖的最新信息。结果表明,南麂列岛土地覆盖以草地和灌木林地等自然属性覆盖为主,占总面积的70%以上,监督分类的总体分类精度为76.31%,Kappa系数为0.71;本次遥感探测所得南麂岛的面积为7.52 km2,海岸线长度为34.64 km,与历史资料相比,面积的相对偏差为1.46%,海岸线的相对偏差为4.56%。

The Applications of High-resolution Satellite Images for Land Cover Monitoring in Nanji Islands

This paper describes the monitoring of land covers using remote sensing technique. IKONOS magery which is the world' s first 1-meter mmercialized remote sensing satellite imagery is used to obtain he land cover and its dynamic information. The methods for geometrical correction method, image fusion ethod and supervised classification method are discussed. The information of the land cover types of anji Islands is derived from these images using supervised classification method, threshold method,egetation index method and man-machine exchange method. The results show that the natural land cover ypes such as meadows and shrubbery are the main types which occupy about 70% area of the Islands, that
the accuracy of the supervised classification method is about 76.31% and the Kappa coefficient about 0.71.Paying the especial attention to the main island, its area and shoreline derived from IKONOS images are7.52 sq. km and 34.64 km, respectively. Comparing the statistics values, their biases are 1.46% and4.56%.