即地理标记语言：是一种用于空间地理信息传输和存储的XML应用，能够表示地理空间对象的空间数据和非空间属性数据。
The advent of XML gives an effective way. GML(Geographical Markup Language) is a XML application used for transmission and storage for geographical information.
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.
由于空间数据的特殊性，传统的空间数据管理方法都不能很好地处理空间数据与属性数据这两种异质数据。
Because of the particularity of spatial data, the traditional spatial data management methods couldn't deal with spatial data and attribute data at the same time effectively.
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