目前普遍使用的基于图层的空间数据库模型存在许多问题。
Layer based spatial database model is widely used now, which consequently causes some difficult problems.
由于许多应用中需要这两种模型，因此本文提出了我们自行设计的一种能够集成域和对象的面向对象空间数据库模型。
Each model has its advantages and limitations. Since both models are needed in application, we thus propose our object oriented model, which integrates field based and object based model.
从数据库构建、属性数据库和空间数据库、路面使用性能评价模型等方面比较详细地介绍了路面管理系统。
Pavement management system was described in detail from the establishment of database, attribute database, spatial database, evaluation model of pavement performance and so on.
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