Navigation system for determining best car journey involves preliminary study of important poles on initial path followed by permanent update whilst driver is in car

摘要

Navigation system comprises two separate steps : first step involves preliminary study of important poles appearing on initial path, poles are separated according to their geographic position and their importance. Second step involves permanent update of poles list whilst driver is in his car. If navigation system doesn't hold direct details about event, it defines profile of event using data such as number of streets, town size, population, etc.