Journal of Geo-information Science >
A Simplification Model of Linear Features Based on the Clonal Selection Algorithm
Received date: 2012-11-01
Revised date: 2012-12-02
Online published: 2012-12-25
The automatic generalization of linear features is an important aspect of map generalization, for linear features occupy more than 80 percent of the map objects. As a major means of linear features generalization, graphic simplification has been the concern of many scholars at home and abroad, they make many researches to implement a large number of automated algorithms. With the intelligent optimization algorithm widely used in various fields, many scholars have tried to introduce the intelligent optimization algorithm into the field of map generalization. And then several scholars have applied the genetic algorithm and ant colony algorithm to the linear feature graphic simplification. They achieved good results, but some defects, too. The artificial immune system development started relatively late, but it has been widely used in various fields, and has got amazing achievements. In this paper we presented a new linear feature graphics automatically simplified model based on the basic principles of clonal selection algorithm, which is kind of AIS, and analyzed the graphics simplification constraints of linear features data compression, taking into account the geometric precision and the shape keeping function. Then we designed the appropriate coding mechanism, mutation mechanism and affinity function, meanwhile combining with infeasible solutions repair mechanisms to improve the precision of graphic simplification. At the end, we compared the simplification results with the clonal selection algorithm, Douglas algorithm and genetic algorithm. Experiments show that, in the same geometric accuracy, the linear feature graphics simplification model this study proposed gave better performance in keeping the shape of linear features graphics. Experiments also verify the feasibility of the artificial immune system in solving the problem of linear feature graphic simplification.
MA Xiao-Ya, GUO Qiang-Qing . A Simplification Model of Linear Features Based on the Clonal Selection Algorithm[J]. Journal of Geo-information Science, 2012 , 14(6) : 698 -703 . DOI: 10.3724/SP.J.1047.2012.00698
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