The spatial database model and the new map management manner can extend to the other fields.
这种数据库结构模型和图层与块相结合的地图管理方式易于扩展到其他领域。
Layer based spatial database model is widely used now, which consequently causes some difficult problems.
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。
Pavement management system was described in detail from the establishment of database, attribute database, spatial database, evaluation model of pavement performance and so on.
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。
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