VGIS-AntiJitter: an effective framework for solving jitter problems in virtual geographic information systems
作者机构：State Key Lab of Resources and Environmental Information SystemInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina Shanghai Key Laboratory for Urban Ecology and SustainabilityEast China Normal UniversityShanghaiChina Department of GeographyUniversity of CaliforniaSanta BarbaraCAUSA National Astronomical ObservatoriesChinese Academy of SciencesBeijingChina
出 版 物：《International Journal of Digital Earth》 (国际数字地球学报（英文）)
年 卷 期：2013年第6卷第1期
页 面：28-50页
核心收录：
学科分类：08[工学] 0708[理学-地球物理学] 0835[工学-软件工程] 0704[理学-天文学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：by the National High Technology Research and Development Program of China(863 Program)(No.2009AA12Z331)and the National Natural Science Foundation of China(No.60972052) supported by the Young Researcher Grant of National Astronomical Observatories,Chinese Academy of Sciences
主 题：Digital Earth VGIS jitter problem round-off error local coordinate system
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 *** 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 ***,the jitter problem,a common problem in VGIS that often causes annoying visual artefacts and deteriorates the output image quality,draws little *** 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 ***,this framework provides an improved dynamic local coordinate system(DLCS)method for terrain or ocean mesh *** vector data,the framework provides a simple and effective multiple local coordinate systems(MLCS)*** framework provides a MLCS method for 3-D model data making full use of the existing local coordinate system of the *** advantages of the proposed methods over current approaches are analysed and highlighted through case studies involving large GIS datasets.
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