嵌入式系统中地图快速漫游算法的实现

The Method of Map roving smoothly in Embeded system

对于一个完善的地理信息系统来讲,庞大的数据库是必不可少的,而对于嵌入式芯片来讲,处理速度仍是有限的。要在有限的处理速度下完成对海量数据的处理,而又不给用户造成地图画面不流畅的感觉,我们除了要从芯片的选型和对数据库的设计方面做出改进以外,还应该提高对芯片的利用率。本文提出了利用处理器的空闲时间片对地图数据进行预处理,从而减少用户等待地图数据组织的时间。这种方法提高了芯片的效率,在改善嵌入式地理信息系统的地图显示性能方面有很显著的作用。

For a Geographic Information System （GIS）,large quantity of data is necessary. But for Embeded processor, the speed of calculation is limited. Then for dealing with large quantity of data in a limited processor , and make the roving of map still smoothly, we must increase the efficiency of the processor except for choosing high speed processor and improving the construct of the data structure. In this paper, the author put forward a new method to realize smooth roving of map in Embeded system. The major idea of the method is to pre-deal data in the idle time of processor in order to cut down the time of organize data.This method makes the processor more efficiency. It is very useful in improving the property of map display in Embeded Geographic Information System.