The circum-lake zone of the Qinghai Lake is one of the most serious regions of desertification on the Qinghai-Tibetan Plateau. Based on Remote Sensing(RS) and Geographical Information System(GIS) tech
60万米外传回的影像图中,北京故宫的黄琉璃瓦顶、上海机场的飞机机型,均能清楚分辨……卫星拍摄的北京西直门,看得清路口斑马线,辨得出大车小车,树木棵棵分明,河流颜色清楚地由浅到深,房屋屋顶颜色明晰……俯瞰下的天山天池,界线分明,碧水澄澈,水面上的船艇驰过后,留下一条洁白的水线……一幅幅纹理清晰的高分二号图像,或许对于那些熟悉谷歌地图的网友,并没有眼前一亮的感
新华网武汉9月25日电(记者朱文辰、吴植)记者从中科院测量与地球物理研究所获悉,由该所研究员郝晓光主编的1:6000万全套新编《世界地势图》本月出版。这套地图首次以东、西、南、北四个视角,从经度、纬度两种方向,将中国与世界的地理关系更加准确和完整地展现在人们面前。这套地图由湖北省地图院编制,湖南地图出版社出
Global Change includes climate change and other environmental changes caused by the joint interaction among various layers of Earth. From the positive side, global change provides new opportunities to
With increasing urbanization and agricultural expansion, large tracts of wetlands have been either disturbed or converted to other uses. To protect wetlands, accurate distribution maps are needed. How
Remote sensing based land cover mapping at large scale is time consuming when using either supervised or unsupervised classification approaches. This article used a fast clustering method—Clustering b
利用卫星的辅助数据构建资源三号卫星影像的严格几何模型。以此为基础,考虑镜头光学畸变、像元尺寸变化和CCD旋转变化等因素的影响,构建附加参数模型;同时构建轨道模型来描述影像的外方位元素变化特征,进行自检校光束法区域网平差。利用资源三号卫星实际数据对附加参数模型和轨道模型进行研究和优化,并分析不同控制点分布对平差精度的影响。试验表明,选择合理的平差数学模型和控制点分布,平面精度可优于0.6 GSD,高