中文摘要：

针对矢量数据多尺度显示中的若干常见关键技术问题进行了讨论,并提出了相应的解决方案,同时结合具体的研究实例进行了实验,较好地实现了利用离散尺度模拟无级比例尺显示。

英文摘要：

In multi-scale display of vector data, it is very troublesome to decide the criterion of small objects, the sequence of scale values, and so on. In order to solve these key problems mentioned above, we discussed some key techniques and gave corresponding solutions. Based on the techniques discussed here, a demonstration was built. The experimental system used an extended GAP-tree index to realize the multi-scale display of vector data. The discussion about these key techniques problems will contribute to the research on the multi-scale display in GIS.