A hierarchical visualization model of the global terrain based on QTM

Jian-jun Bai; Chao-de Yan; Xue-sheng Zhao

doi:10.1117/12.812644

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3 November 2008 A hierarchical visualization model of the global terrain based on QTM

Jian-jun Bai, Chao-de Yan, Xue-sheng Zhao

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Proceedings Volume 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments; 714333 (2008) https://doi.org/10.1117/12.812644
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China

Abstract

A global multi-resolution digital elevation model (DEM) and a feasible solution for its visualization and management remains a challenging vision. In this paper a multi-resolution DEM based on the ellipsoidal triangular meshes is made to approximate to the earth surface. It was built through quaternary triangular mesh (QTM) hierarchical tessellation of the ellipsoidal surface. In order to achieve fast access, we organize the global DEM data as a hierarchy of Diamonds and indexing them based on the linear quadtree. Furthermore, a LOD is built through recursive subdivision of each Diamond, and an approach of viewpoints-based data extraction based on the neighbor-Diamond searching from the global DEM data is implemented for visualization. All this is backed with an implementation of a prototype computer system.

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Jian-jun Bai, Chao-de Yan, and Xue-sheng Zhao "A hierarchical visualization model of the global terrain based on QTM", Proc. SPIE 7143, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 714333 (3 November 2008); https://doi.org/10.1117/12.812644

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