The paper analyses the cause of the rainstorm and waterlogging problems in Shanghai urban district from the geological position, climate conditions and history cause etc.
本文对上海市区暴雨积水问题的原因从地位位置、气候条件、历史原因等方面作了分析。
How to organize spatial data effectively and design an excellent storage pattern are two fundamental problems in 3d urban geological spatial database.
如何建立高效的数据组织以及存储模式是三维城市地质数据库必需要解决的两大基础性问题。
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