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	VGIS-AntiJitter: an effective framework for solving jitter problems in virtual geographic information systems
	Luo F. X. ; Zhong E. S. ; Cao G. F. ; Tellez R. D. ; Gao P. Q.
	2013
关键词	Digital Earth VGIS jitter problem round-off error local coordinate system
英文摘要	With the proposition of the Digital Earth (DE) concept, Virtual Geographic Information System (VGIS) has started to play the role of a Digital Earth prototype system. Many core problems involved in VGIS, such as out-of-core management and interactive rendering of very large scale terrain and image data, have been well studied in the past decades. However, the jitter problem, a common problem in VGIS that often causes annoying visual artefacts and deteriorates the output image quality, draws little attention. In this paper, after an intensive analysis of the jitter problem, a comprehensive framework is proposed to address such a problem while accounting for the characteristics of different data types in VGIS, such as terrain or ocean mesh data, vector data and 3-D model data. Specifically, this framework provides an improved dynamic local coordinate system (DLCS) method for terrain or ocean mesh data. For vector data, the framework provides a simple and effective multiple local coordinate systems (MLCS) method. The framework provides a MLCS method for 3-D model data making full use of the existing local coordinate system of the model. The advantages of the proposed methods over current approaches are analysed and highlighted through case studies involving large GIS datasets.
出处	International Journal of Digital Earth
卷	6
期	1
页	28-50
收录类别	SCI
语种	英语
ISSN号	1753-8947
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30354]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Luo F. X.,Zhong E. S.,Cao G. F.,et al. VGIS-AntiJitter: an effective framework for solving jitter problems in virtual geographic information systems. 2013.

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