Friday, April 2, 2010

under normal circumstances


For example, the oval restricted area can get the shortest path under normal circumstances, but when the starting point is far away from the end point, the efficiency is sometimes even worse than the whole region search algorithm without restrictions. In the blog lace wedding dresses rectangular and fan restricted area, the starting point and end point is the corresponding vertex of the region, and the shortest path in the actual traffic may be reverse from the wedding gowns dresses starting point, in which situation the searched shortest path is not the real shortest path. In the combination of round and rectangular restricted area, the issue of reverse has been taken into account, but the cheap evening dresses consideration about the ring roads is not enough.Through the general analysis and comparison of the existing algorithms with various restricted area, we propose the restrictions search algorithm on the use of diamond-shaped region to amend and optimize restrictions Dijkstra algorithm to improve response time and to reduce the computing organizing time. Although this method is more than combination of blog wedding dresses 2010 round and rectangular or rectangular area alone in the search area limits, but is less than the oval. And it considers of the road environment in the real existence of the cheap wedding gown dresses reverse, loop and so on. As a whole it is relatively better than the other regions of the search algorithm.Finally, this article draw the shortest path algorithm of the system model above the serval algorithm as follows: after optimized Dijkstra algorithm for the based algorithm, as its foundation on the use of user optimal travel path selection algorithm, hierarchical path search algorithm, as well as diamond regional restrictions search algorithm. The system enabled the maximum extent possible to meet the needs of users, and on implementation at mapxtreme there is a full advantage of the existing library to the application in the positioning system.
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