【摘要】 采用具有1m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7.52km2,海岸线长度为34.64km,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%。更多还原

【Abstract】 This paper describes the monitoring of land covers using remote sensing technique. IKONOS imagery which is the world’s first 1-meter commercialized remote sensing satellite imagery is used to obtain the land cover and its dynamic information. The methods for geometrical correction method, image fusion method and supervised classification method are discussed. The information of the land cover types of Nanji Islands is derived from these images using supervised classification method, threshold method, vegetation index method and man-machine exchange method. The results show that the natural land cover types 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 are 752 sq. km and 34.64 km, respectively. Comparing the statistics values, their biases are 1.46% and 456%.更多还原