The function and acquirement of E-MAP, and the design and update technique of navigation database are also put forward in detail.
详细叙述了电子地图的作用、获取以及导航数据库的设计与更新技术。
The volume of the navigation star database is large when star map recognition is carried out by KMP algorithm.
用KMP算法进行星图识别时，制定的导航星库容量大。
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