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Some Thoughts on Virtual Geographic Environments

LIN Hui1,XU Bing-li1,2(1.Institute of Space and Earth Information Science,The Chinese University of Hong Kong,Hong Kong;2.State Key Laboratory of Remote Sensing Science,Institute of Remote Sensing Applications of Chinese Academy of Sciences,Beijing 100101,China)  
To answer some frequently-asked questions about Virtual Geographic Environments(VGE),the concept of VGE,including its theory,methodology,technology and applications,is discussed with its difference from traditional GIS.Unlike the traditional GIS with only one core of geo-database,VGE has two cores,which are geo-database and the model management.VGE is a virtual environment to present not only static objects,such as buildings,but also dynamic processes,for instance pollutant dispersion.The proposed virtual environments are online platforms which allow multi-users to operate the same work from geographically distributed places collaboratively.These features make VGE a knowledge sharing and generation platform instead of a data sharing system.
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