Abstract: The railway marshalling yard is the center of railway hub,where trains are distributed and divided.Railway lines are extremely complex.Meanwhile,as there are only a limited number of marshalling yards in the world,few research articles are devoted to finding a map generalization strategy.Many existing research results on line selection are not applicable to marshalling yard.So,this paper presents a novel automated map generalization method for railway marshalling yard. First,six map patterns are extracted based on the spatial distribution and topological characteristics of marshalling yard,including broken arc,same-node arc,similar arc,mesh arc,parallel arc and main arc.Then,three basic principles suitable for map generalization and automated processing are proposed.Finally,practical data is used to validate the method.The results show that our method is highly reasonable and efficient.

Key words: map generalization, railway marshalling yard, map pattern, basic principles, automatic processing