The present invention relates to a four chapter implementation method using nine pieces of memory in a car navigation system. In general, a four chapter implementation method of reading four pieces of map data on a four pieces of memory and drawing a map is intended to view adjacent maps. In this case, since the existing map needs to be copied even if only a little scrubbing occurs, the scrolling speed may be reduced due to the copy time. Therefore, the present invention may use the remaining five memories after reading four maps using nine memories, and thus use a certain distance. If you scroll, you don't have to copy it, so the scrolling speed is faster.
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