地理模型分布式集成是虚拟地理环境研究的主要内容之一。

The distributed integration of geographical models is one of the main objectives of the virtual geographical environment.

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因此，如何将这些分布式异构地理模型进行统一表达、管理并集成到虚拟地理环境系统中，是当前亟待解决的难点问题。

So how to define and manage these distributed heterogeneous models uniformly, and how to integrate into the virtual geographical environment system, still remain the problems to be solved urgently.

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地理模型分布式集成是虚拟地理环境研究的主要内容之一。

Research on Visual Expression Method of Temporal Information in Virtual Geographical Environment;

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地理模型分布式集成是虚拟地理环境研究的主要内容之一。

Research on Visual Expression Method of Temporal Information in Virtual Geographical Environment;

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