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Research and Implement on the Spatial Data Organization and Management of 3D-WebGIS

Author: ZhengGuoJiang
Tutor: LiChengMing
School: Chinese Academy of Surveying and Mapping
Course: Cartography and Geographic Information Engineering
Keywords: Network three-dimensional Multi - source spatial data Linear quadtree Levels of detail Multi - level cache Streaming progressive transmission Restful services
CLC: P208
Type: Master's thesis
Year: 2010
Downloads: 354
Quote: 1
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Abstract


With the development of network technology , computer graphics , computer technology , combined with the network technology and three-dimensional visualization technology network three - dimensional geographic information system GIS development direction of its research mainly concentrated in the three-dimensional visualization and analysis of three-dimensional space , multi-source data integration . Outsider In addition to the three-dimensional visualization , organization and management of spatial data in a network environment is also a hot research . The network system is involved in a variety of three-dimensional type massive spatial data , such as multi- source multi- resolution terrain / image data , vector feature data as well as three-dimensional model data . How effective organization and management of these massive data has become a bottleneck restricting the development of 3D-WebGIS . Based on the current research situation , a systematic study of the spatial data organization and management of the network three - dimensional geographic information system : first analysis of the choice of network three-dimensional Geographic Information System spatial data types , spatial reference system , in accordance with the linear quadtree LOD model organizational image , terrain data , establish a tile pyramids library ; organizations and progressive model of the three-dimensional model of the application ; specially designed vector data organization and classification block requests . Followed by massive spatial data management , optimization of disk storage , and design a hybrid data management and multi-level caching mechanism to reduce disk IO , improve the response speed ; released for spatial data network , spatial data compression , network flow to progressive transmission type , cluster - based data services , such as measures to improve the efficiency of the response of three-dimensional data services , and design Restful interface, three-dimensional geographic information services ; then complete the implementation and testing of the data organization and management system module , such as images , terrain pyramid the tile library to quickly create spatial database design and data warehousing , implementation and testing of the three-dimensional geographic information services ; according to this paper, data organization and management solutions , has developed a three-dimensional geographic Information System NewMap3DGlobe introduced the system in the digital city geographic information public platform project , to verify the feasibility of the program , the next stage of the work done prospect .

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Mapping database and information system
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