基于快速制图数据库的图形冲突检测方法研究

Research on graphic conflicts detection method based on fast mapping database

地图数据库的质量控制问题是地图数据生产的重要内容之一,关系着制图表达的质量。快速制图数据库建设过程中发生的地图缩编、制图综合等数据处理,不可避免地产生图形冲突,影响地图图面效果。而人工检查图形冲突不仅工作量大且容易发生错判和遗漏。为了快速、全面的检查图形冲突,文章分析了快速制图数据库中的图形冲突类型,建立了图形要素关系判断规则,在此基础上提出了基于符号宽度的图形冲突检测方法。以1∶100 000地图数据为例,实现对图形冲突的自动快速检测,试验结果表明该方法有助于提高制图效率和质量。

The quality control of map database is one of the important contents of map data production,which affects the quality of cartographic expression.The data processing such as map reduction,map generalization and so on in the process of constructing the rapid mapping database inevitably produces the graphic conflicts and affects the map surface effect.But the manual checking of graphic conflicts is not only heavy workload but also easy to misjudge and miss.In order to check the graphic conflicts quickly and comprehensively,this paper analyzes the types of graphic conflicts in the fast mapping database,establishes the rules for judging the relationship between graphic elements,and then proposes a method for detecting graphic conflicts based on symbol width.Then,an example of 1:100 000 map data is given to realize the automatic and rapid detection of graphic conflicts.The experimental data results show that this method can improve the efficiency and quality of mapping.