As compared with the conventional relational database, the GIS dat abase has a great deal of merits.

与传统的关系数据库相比，基于GIS的数据库具有不可比拟的优点。

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This system not only has conventional Web GIS functions, but plays an important role in tour-route-decision making, tour guiding, virtual reality in traveling and geo-science popularization.

该系统采用开放式的设计模式，实现了旅游信息GIS查询、旅游路线生成、模拟旅游和公众地质科普教育等功能。

youdao

This system not only has conventional Web GIS functions, but plays an important role in tour-route-decision making, tour guiding, virtual reality in traveling and geo-science popularization.

该系统采用开放式的设计模式，实现了旅游信息GIS查询、旅游路线生成、模拟旅游和公众地质科普教育等功能。

youdao