The scheme for the database building and updating of 1∶10 000 digital elevation models     

Zhu Qing  Li Zhilin  Gong Jianya  Sui Haigang 《地球空间信息科学学报》2013,16(2):19-25

The National Bureau of Surveying and Mapping of China has planned to speed up the development of spatial data infrastructure (SDI) in the coming few years. This SDI consists of four types of digital products, i. e., digital orthophotos, digital elevation models, digital line graphs and digital raster graphs. For the DEM, a scheme for the database building and updating of 1∶10 000 digital elevation models has been proposed and some experimental tests have also been accomplished. This paper describes the theoretical (and/or technical) background and reports some of the experimental results to support the scheme. Various aspects of the scheme such as accuracy, data sources, data sampling spatial resolution, terrain modeling, data organization, etc are discussed.  相似文献   

Basic research on key techniques related to urban 3D pipe network modeling     

Du Guoming  Gong Jianya  Xiong Hanjiang 《地球空间信息科学学报》2013,16(4):41-45

A new geometric modeling approach is introduced in this paper. First the principle of modeling of 3D pipe network is discussed in detail. Then the procedures of implementing pipe network visualization and system functions are presented. Last, several efficient methods for speeding up display of graphics are introduced. The new geometric modeling approach offers to people a new way to solve 3D visualization of complex urban pipe network.  相似文献   

An algorithm for automatic cartographic sounding selection     

Sui Haigang  Cheng Penggen  Zhang Anming  Gong Jianya 《地球空间信息科学学报》2013,16(1):96-99

Soundings on nautical charts provide information about the shape of ocean bottom between chart depth curves. A single chart may have thousands of soundings posted on it. This paper describes a new algorithm for selecting soundings automatically. At first, the problem encountered in automatic cartographic sounding selection is presented. Then the authors give the principle of the new algorithm, and the implementation is illuminated in detail. At last the experiments prove the rationality and efficiency of the new algorithm.  相似文献   

Architecture of HLA based distributed virtual geographic environment     

Xu Bingli  Lin Hui  Gong Jianhua 《地球空间信息科学学报》2013,16(2):127-134

Integrating the theory of distributed virtual geographic enviroments (DVGE) and high level architecture(HLA), the architecture of DVGE based on HLA is designed. The data flow and the object models of the architecture are also discussed. The architecture basically meets the need of DVGE in real-time communication, distribution, collaboration, reusing and interoperation, expansion, and standard.  相似文献   

Shape similarity measures of linear entities     

Zhang Qiaoping  Li Deren  Gong Jianya 《地球空间信息科学学报》2013,16(2):62-67

The essential of feature matching technology lies in how to measure the similarity of spatial entities. Among all the possible similarity measures, the shape similarity measure is one of the most important measures because it is easy to collect the necessary parameters and it is also well matched with the human intuition. In this paper a new shape similarity measure of linear entities based on the differences of direction change along each line is presented and its effectiveness is illustrated.  相似文献   

A construction schema for provincial spatial database of China     

Yandong Wang  Jianya Gong 《地球空间信息科学学报》2013,16(1):25-32

In order to provide a provincial spatial database, this paper presents a scheme for spatial database construction to meet the needs of China. The objective and overall technical route of spatial database construction are described. The logical and physical database models are designed. Key issues are addressed, such as integration of multi-scale heterogeneous spatial databases, spatial data version management based on metadata and integrative management of map cartography and spatial database.  相似文献   

Terrestrial laser scan survey and 3D TIN model construction of urban buildings in a geospatial database     

Tao Tang  Wenji Zhao  Huili Gong  Aiwu Zhang  Jiangang Pan  Zhiqiang Liu 《国际地球制图》2013,28(4):259-272

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济宁市国土资源局数字档案馆建设设计思路     

李晓燕  范威  陈三梅 《国土资源信息化》2013,(3):41-46

为进一步加强国土资源档案的管理和利用,参照OAIS参考模型构建基于J2EE的全B/S结构的国土资源档案管理系统,与现有电子政务系统、建设用地审批系统、地籍信息管理系统等系统及数据中心进行系统集成,实现了档案的收、管、存、用全程信息化管理和档案的数、图、文一体化管理,建设市县互联互通的档案管理信息化平台,方便内网及外网用户的档案查询与利用。  相似文献   

红山地震台震相到时准确测定     

李细顺  王利兵  王静  胡秀娟  罗娜  畅国平  陈晓燕 《地震地磁观测与研究》2013,(5):87-90

利用工具软件对选取的红山地震台波形数据进行分析处理,从波形包含的频率成分特征上可以区分地脉动、干扰、地震;利用Fourier变换、滤波、复时谱分析、高斯小波分析、莫莱小波分析、DB小波分析等手段,综合分析处理可准确标注地震震相.  相似文献   

阿图什市5.2级地震与于田6.2级地震前兆异常分析     

冯英  潘振生  徐衍刚  赖爱京  龚固斌  张治广 《地震地磁观测与研究》2013,34(3)

利用阿克苏台网中心前兆观测数据,采用动态分析、形态法对新疆阿图什市Ms5.2地震和于田县Ms6.2地震进行系统分析.发现两次地震前,阿合奇台地倾斜资料、乌什台水管倾斜资料、伸缩仪资料、体应变及辅助测项钻孔水位和静水位数据、地电数据均出现明显的震前异常.其中水管仪、伸缩仪、体应变、地倾斜表现为打破年变,水管仪震前几天出现高频抖动、日变形态畸变;体应变辅助测项钻孔水位和静水位、地电震前表现为突变.  相似文献