该三维地图将由Saab ab公司研发的快速三维绘图系统而生成，该系统可在航空影像基础上提供非常详细的现实三维模型。
The 3d-maps will be generated by the system Rapid 3d Mapping, developed by Saab ab, which produces highly detailed and realistic 3d-models based on aerial images.
本文讨论我们设计并实现的地图数据库管理系统MDB的体系结构、数据模型、数据类型及其实现技术。
This paper discusses the architecture, data model and implementation techniques of our map data base management system MDB.
本文以地图符号的视觉变量和地图要素的表示等级为依据，详细介绍了地图设计专家系统中点状符号设计的推理模型。
On the basis of the visual variables of map symbol and the represent grade of map elements, this paper introduces the inference model of point symbol design in map design Expert System.
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