文献类型： 会议论文

第一作者： Lv Zhenhua

作者： Lv Zhenhua ¹ ; Wu Jianping ¹ ; Zhang Shengmao ² ; Zhao Hui ³ ;

作者机构： 1.Key Laboratory of Geographic Information Science, Ministry of Education;Geography Department, East China Normal University, Room 324, Lane 3663 North ZhongshanRoad, Shanghai, China 200062

2.Key and Open Laboratory of Remote Sensing and Information Technology Application inFisheries, East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences, NO.300, Jungong Road , YangPu District, Shanghai, China 200090

3.Institute of Software Engineering, East China Normal University, Room 211, Lane 3663 NorthZhongshan Road, Shanghai, China 200062

关键词： quaternary triangular mesh;remote sensing image;coordinates transformation;QTM code;HDF

会议名称： International Symposium on Digital Earth: Data Processing and Applications

主办单位：

页码： 784105:1-784105:9

摘要： Representing RS (remote sensing) images under multi-resolution is a key component of "Digital Earth", and becomes one of the fundamental problems in Geography and Spatial Information Science. QTM (Quaternary Triangular Mesh) with excellent features of global continuity, stability, hierarchy, and uniformity has the potential ability to represent the global model. In this paper, we present a method of displaying the RS images. This method is primarily divided into two steps. First, the caftulated geographical coordinate of each pixel in a dataset is transformed into a QTM code at a proper subdivision level, and the pixel value is also mapped into a triangular cell which is correlative to the pixel. Second, all the triangular cells are displayed by the use of OpenGL. The transformation from geographical coordinates to QTM codes are also examined at different subdivision levels. In the end, the experiment is performed with FengYun(FY-3) Satellite Data(HDF5 format) and aerial remote images (Tif format) of Shanghai in China. The results illustrate that this method is acceptable.

分类号： N-532