A Method of Terrain Crack Removal Suited for Large Differences in Boundary LoD

Chengming Li, Zhendong Liu, Xiaoli Liu

2019

Abstract

Terrain crack removal is an unavoidable problem that must be solved in real-time three-dimensional (3D) terrain rendering. Conventional elevation adjustment-based crack removal methods are plagued by a number of problems, including restrictions associated with level of detail (LoD) differences, computational inefficiency and lighting discontinuities. To address these issues, we propose a crack elimination method that is suited for large differences in boundary LoD. The first step in this method is the construction of terrain quadtrees that contain edge and angle adjacency information. These structures are then updated in real time. The second step is to modify the boundary mesh vertices using linear interpolation, which allows for LoD differences greater than 1 between adjacent tiles. Finally, the vertex normals of the mesh vertices of the terrain block are calculated and evaluated. Our method was experimentally validated using topographical data from a mountainous region in Sichuan Province, and the results provide evidence that supports the reliability and superiority of the proposed method compared to the conventional method.

Paper Citation

in Harvard Style

Li C., Liu Z. and Liu X. (2019). A Method of Terrain Crack Removal Suited for Large Differences in Boundary LoD.In Proceedings of the 5th International Conference on Geographical Information Systems Theory, Applications and Management - Volume 1: GISTAM, ISBN 978-989-758-371-1, pages 60-70. DOI: 10.5220/0007703000600070

in Bibtex Style

@conference{gistam19,
author={Chengming Li and Zhendong Liu and Xiaoli Liu},
title={A Method of Terrain Crack Removal Suited for Large Differences in Boundary LoD},
booktitle={Proceedings of the 5th International Conference on Geographical Information Systems Theory, Applications and Management - Volume 1: GISTAM,},
year={2019},
pages={60-70},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007703000600070},
isbn={978-989-758-371-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 5th International Conference on Geographical Information Systems Theory, Applications and Management - Volume 1: GISTAM,
TI - A Method of Terrain Crack Removal Suited for Large Differences in Boundary LoD
SN - 978-989-758-371-1
AU - Li C.
AU - Liu Z.
AU - Liu X.
PY - 2019
SP - 60
EP - 70
DO - 10.5220/0007703000600070