旅游地图符号库是旅游地理信息系统（TGIS）中的重要一部分。
The tourism map symbol database is an important component in the tourism GIS(TGIS).
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.
结合嵌入式系统的要求，设计并实现了适合嵌入式车辆导航系统的地图符号库。
Considering the demand of embedded system, this paper designs and realizes a Map Symbol Base for VNS specially.
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