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| 1 | Digital Earth在防震减灾工作中的应用——Google Earth为例显示文摘美国前副总统戈尔在1998年提出了Digital Earth的概念,本文对Digital Earth在防震减灾工作中的应用做了初步探索,对Digital Earth的主要软件——Google Earth做了介绍,并对其在防震减灾工作中的应用做了详细论述。介绍了Google Earth结合震害快速评估,构造研究、野外地震地质调查的具体应用。Digital Earth在不断发展,在我们的工作、生活中发挥了巨大作用,防震减灾工作中Digital Earth的应用才刚刚开始,可以肯定,Digital Earth作为当今科技制高点,将会使传统防震减灾工作的技术方式等产生根本性的改变。 | 李东平 孙建国 胡绣芳 | 2007 | 地震地磁观测与研究2007，28，2： | 5 |
| 2 | Framework and development of digital China显示文摘Digital China (DC) has recently drawn much attention. It is a strategic project for China in response to the challenge of sustainable development of population,re-source,and environment. Intending to establish the national information infra-structure (NⅡ),the DC project forms a solid foundation for Chinese informatization. In such an NⅡ,multi-sourced spatial data are integrated. They focus on various themes and have different space and time features. Based on the NⅡ,numerous applications and services can be developed so that spatial information will benefit everyone. Since lots of organizations,such as governments,universities,and en-terprises,are involved in the implementation of DC,the DC project will significantly prompt the relevant scientific research as well as economic progress in China. | WU Lun & TONG QingXi Institute of Remote Sensing and Geographical Information Systems,Peking University,Beijing 100871,China | 2008 | Science China(Technological Sciences)2008，51，S1： | 5 |
| 3 | Parallel algorithm for real-time contouring from grid DEM on modern GPUs显示文摘A real-time algorithm for constructing contour maps from grid DEM data is pre-sented.It runs completely within the programmable 3D visualization pipeline.The interpolation is paralleled by rasterizer units in the graphics card,and contour line extraction is paralleled by pixel shader.During each frame of the rendering,we first make an elevation gradient map out of original terrain vertex data,then figure out the final contour lines with image-space processing,and directly blend the results on the original scene to obtain a final scene with contour map using alpha-blending.We implement this method in our global 3D-digitalearth system with Direct3D?9.0c API and tested on some consumer level PC platforms.For arbitrary scene with certain LOD level,the process takes less than 10 ms,giving topologically correct,anti-aliased contour lines. | CHEN Zhuo,SHEN Lei,ZHAO YanQing & YANG ChongJun State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University,Beijing 100101,China | 2010 | Science China(Technological Sciences)2010，53，S1： | 3 |
| 4 | Constructing a core framework of visual engine for Digital Earth system显示文摘A visual engine is the core of a Digital Earth system.There is a wide variety of functional requirements in Digital Earth system and different requirements correspond to different operations.Based on the development of the visual engine for ChinaStar,a 3D Digital China prototype software platform,and analysis of 3D Digital Earth platforms such as Google Earth,Virtual Earth,Skyline,etc,are discussed.A common core framework for a visual engine is proposed in this paper to construct a visual engine and then with this framework various Digital Earth application systems can be developed efficient.The parametric model of the Earth,scheduling and optimization in visual field,choice of 3D graphics library,and designing component-based visual engine framework of Digital Earth are discussed in detail.In addition,the relationships among these four basic components and the construction of visualization applications of Digital Earth by this method are also discussed. | WENG JingNong,WANG YingJie & CAI Heng School of Computer,Beihang University,Beijing 100191,China | 2010 | Science China(Technological Sciences)2010，53，S1： | 2 |
| 5 | On 3D simulation of moving objects in a digital earth system显示文摘'How do the rescue helicopters find out an optimized path to arrive at the site of a disaster as soon as possible?' or 'How are the flight procedures over mountains and plateaus simulated?' and so on.In this paper a script language on spatial moving objects is presented by abstracting 3D spatial moving objects' behavior when implementing moving objects simulation in 3D digital Earth scene,which is based on a platform of digital China named 'ChinaStar'.The definition of this script language,its morphology and syntax,its compiling and mediate language generating,and the behavior and state control of spatial moving objects are discussed emphatically.In addition,the language's applications and implementation are also discussed. | WENG JingNong1,WU Lun2,HUANG Jian1,WANG Yang1,YANG Xue1 & HU Bin1 1 College of Software,Beihang University,Beijing 100191,China 2 Institute of Geographical Information System and Remote Sensing,Peking University,Beijing 100871,China | 2008 | Science China(Technological Sciences)2008，51，S2： | 2 |
| 6 | Analysis-enhanced virtual globe for digital earth显示文摘Virtual globe has been recognized as an appealing technology to support the digital earth.It provides an intuitive and appealing way to visualize geospatial information,and is being used frequently to bring the globe-scale geospatial information to our fingertips.The easy access to virtual globes such as Google Earth,Microsoft Virtual Earth,and NASA World Wind allows both the general public users and professionals to use them for educational and research purposes.While virtual globes provide a number of functions for geospatial data visualization and annotation,the geospatial analysis functions available in the current virtual globes are limited.This paper addresses an approach to the establishment of an analysis-enhanced virtual globe.The approach is based on the integration of virtual globe and interoperable geoprocessing services.Such an analysis-enhanced virtual globe combines the visualization and communication power of virtual globes with the conventional powerful analysis functions of GIS,thus meeting the analysis demands in digital earth. | YUE Peng,GONG JianYa,XIANG LongGang & CHEN Jing State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing (LIESMARS),Wuhan University,Wuhan 430079,China | 2010 | Science China(Technological Sciences)2010，53，S1： | 1 |
| 7 | Tentative Ideas on the Development of “Digital Ocean”in China显示文摘To greet the ocean age of the 21 century, proceeding from the development strategy of the country, China has included the project on the development of the 'digital ocean' in the National Marine Science and Technology Development Plan for the period of Tenth Five-year-Plan and the long-term tentative plan for the year 2015. The goal of the project is collect information on 3-D ocean monitoring, complete the digitizing project of marine information and the establishment of the marine spatial data infrastructure and to realize sharing of the marine information and establishment of the basic project of 'digital ocean'.Research and development of the project '221' for 'digital ocean' will be carried out in the period. That means two key technologies: technology for spatial data infrastructure and technology for 'digital ocean' support; two platforms: research and development on dynamic 4-D marine geographical information system and demonstration for application. | 侯文峰 | 2000 | Marine Science Bulletin2000，2，1： | 0 |
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