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基于PDA的矢量图形的快速显示一直是移动GIS研究的一个重要方面。本文针对PDA的特点,提出了数据分块加载,分级显示的数据结构模型,实验结果表明该数据模型能够显著的提高大数据量的矢量地图数据的显示速度,可用于PDA上矢量数据的快速显示。
The rapid display of PDA-based vector graphics has always been an important aspect of mobile GIS research. According to the characteristics of PDA, a data structure model of data loading and hierarchical display is proposed in this paper. Experimental results show that this data model can significantly improve the display speed of vector map data with large data volume and can be used to quickly display vector data on PDA .