提高GIS中居民地要素层可视化效果的研究

GIS矢量数据中的居民地要素层可视化一直是GIS用户重点关心的问题。文中从居民地快速自动取舍、多级动态符号管理、注记显示完整性等方面对居民地可视化进行了研究,提出了“扩展虚拟浮动圆法”用于集群状居民地的自动取舍、“多级动态符号管理机制”代替传统的静态地图符号以及“标注与地理对象相结合法”用于解决注记的完整性显示,三者相结合在实践中予以综合使用,较好地解决了多幅图背景下的任意比例尺居民地要素层快速、美观、高质量的显示问题。

Improving Visualization Effect of Resident Element Lay of GIS

The resident visualization is always attached importance to GIS user.This paper studies these fields,including resident automated selection,multi-grade dynamical symbol management and integrated annotation.The author also brings forward three methods,such as extended virtual floating circle method used for automated selecting aggregative resident,multi-grade dynamical symbol management used to replace traditional map symbol and connection of annotation and geographical object used for integrated annotation.By using these methods in practice,the problem of resident quick,beautiful and high quality rendering are solved based on multi-map.