A Multi-resolution TIN Surface Modeling and Visualization Method for Coastal Areas in Virtual Globe

XIONG Hanjiang; ZHENG Xianwei; GONG Jianya

doi:10.13203/j.whugis20150678

Volume 42 Issue 11

Nov. 2017

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Geomatics and Information Science of Wuhan University > 2017 > 42(11): 1597-1603. > DOI: 10.13203/j.whugis20150678

XIONG Hanjiang, ZHENG Xianwei, GONG Jianya. A Multi-resolution TIN Surface Modeling and Visualization Method for Coastal Areas in Virtual Globe[J]. Geomatics and Information Science of Wuhan University, 2017, 42(11): 1597-1603. DOI: 10.13203/j.whugis20150678

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A Multi-resolution TIN Surface Modeling and Visualization Method for Coastal Areas in Virtual Globe

State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China

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The Scientific Special Project of the Public Welfare Industry of Surveying, Mapping and Geographic Information 201512009

the National 863 Program of China 2012AA12A405

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Author Bio:
XIONG Hanjiang, PhD, professor. specializes in 3D virtual globe. E-mail: xionghanjiang@163.com
Corresponding author:
ZHENG Xianwei, lecturer, PhD. E-mail: zhengxw104@163.com
Received Date: February 29, 2016
Published Date: November 04, 2017

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Abstract

Abstract

This paper proposes a multi-resolution TIN surface modeling and visualization method for coastal topography in a virtual globe system. a tile-pyramid model is used to organize the multi-resolution TIN data to solve the problems stemming from the storage of large-scale reference TIN data. A greedy insertion algorithm was used to construct the multi-resolution TIN pyramid. In order to efficiently index the global TIN data, we also propose a novel virtual node (VN) model to guarantee the seamless partition of the multi-resolution TIN triangulation into tiles and storage in a chunked TIN pyramid. Aiming to avoid terrain cracks, we also developed an encoding and decoding approach to match triangulation of different resolutions. Our method was implemented in a virtual globe system. The results show that, the method can dramatically reduce the amount of triangles for rendering the ocean surface, while achieving high fidelity in representation of the islands and coastal lands. This approach overcomes deficiencies of the traditional Grid-based virtual globes.
- virtual globe,
- TIN,
- multi-resolution modeling,
- virtual partition,
- 3D visualization

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