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《Computer Engineering & Science》 2008-09
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Research on the Multi-Resolution Modeling and Three-Dimensional Display of GIS Vector Data

YANG Bing,KANG Lai,WU Ling-da,YU Rong-huan (School of Information Systems and Management,National University of Defense Technology,Changsha 410073,China)  
This paper proposes a method for multi-resolution modeling,organization and three-dimensional display of GIS vector (points,lines,polygons) data.In the preprocessing phase,the multiple representation of vector data is extracted by vector simplification algorithms,then each representation layer is partitioned into small blocks which are used to construct the hierarchical vector data quad-tree in a bottom-up way.At run-time a synchronous thread is employed to schedule vector data blocks specified by the view-frustum culling results and screen space error metrics.Experimental results show that the proposed approaches can satisfy the requirements of real-time rendering of large-scale vector data,which benefit from the multi-resolution data organization and data scheduling scheme.
【Fund】: 国家863计划资助项目(2006AA01Z319)
【CateGory Index】: TP391.41
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