Abstract
A new road network selection method based on hierarchical structure is studied.Firstly,road network is built as strokes which are then classified into hierarchical collections according to the criteria of betweenness centrality value(BC value).Secondly,the hierarchical structure of the strokes is enhanced using structural characteristic identification technique.Thirdly,the importance calculation model was established according to the relationships among the hierarchical structure of the strokes.Finally,the importance values of strokes are got supported with the model's hierarchical calculation,and with which the road network is selected.Tests are done to verify the advantage of this method by comparing it with other common stroke-oriented methods using three kinds of typical road network data.Comparision of the results show that this method had few need to semantic data,and could eliminate the negative influence of edge strokes caused by the criteria of BC value well.So,it is better to maintain the global hierarchical structure of road network,and suitable to meet with the selection of various kinds of road network at the same time.
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