介绍了基于GIS的飞行器定位系统的基本原理,研究了一种数字影像与GIS矢量数据的匹配方法.该方法采用局部最优与整体匹配相结合的匹配策略,利用数字影像上提取的线特征作为匹配的共轭实体,以线特征的角度、线特征的长度、相交线特征之间的夹角等作为匹配的匹配实体,通过计算匹配实体间的相似性测度实现共轭实体间的精确匹配. This paper introduces the basic principle of the aircraft positioning system based on GIS and studies a matching method between digital image and GIS vector data. This method uses the matching strategy of local optimum and global matching, and uses the extracted line features on digital image as The matched conjugate entities are matched matching entities based on the angle of the line features, the length of the line features and the angle between the intersecting line features, and the exact matching between the conjugate entities is achieved by calculating the similarity measure between the matching entities.