The first vague conception to be made clear is the difference between taking Europe as a cultural or geographic concept.
首先要弄清的模糊概念是欧洲到底应该作为地理还是文化概念来理解。
The paper introduces the basic concept and principle of the technology in Geographic Information System (GIS), discusses some kinds of technology and methods to carry out.
论文介绍了地理信息技术中有关基本概念、原理和方法，探讨了一些实现技术和方法。
This paper addresses the concept and characteristics of virtual geographic environments (VGE).
提出虚拟地理环境概念，并讨论其特征。
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