面向道路网络地图示意化的线形简化方法

针对当前示意网络地图线形状简化方法中存在需要人工干预或地图认知度低的问题,本文提出自动化程度高并能保证良好地图认知的线形状简化方法.该方法通过合理设定线形状简化中所需的阈值以避免人工干预,提高了线形状简化过程的自动化程度,并通过在简化过程中应用平滑算法,以减少示意结果中线对象在方向上的转折数,从而提高了简化度和清晰度.试验表明该方法不仅可以生成清晰的示意结果,并且能够保证良好的地图认知度.

A Line-shape-simplification Method for Schematization of Road Network Map

The line shape simplification plays an important role in the production of schematic network maps. However, in current automated schematization methods, the simplification of line shapes either needs a threshold determined in manual manner so as to decrease the automated degree, or ignore the original line shape so as to reduce the map recognition. This study aims to tracke these problems and an automated method for the line shape simplification is proposed. In this method, a threshold for the simplication of line shapes was given and the line smoothing was applied to network map in this simplification process in order to improve the simplification degree of the line shapes. The experimental results indicated that the new method is able to automatically generate schematic maps with great clarity and well-preserved map recognition compared with their original shapes.