电子地图中动态注记方法的研究实现

本文基于MAPGIS讨论了在GPS汽车导向系统的电子地图中汉字注记的信息缺损，注记压盖，即时显示及平滑浏览时的屏幕闪烁等问题。采用一种快速而实用的方法－再分段求匀注记汉字，来解决信息缺损，注记压盖等问题；采用内存缓冲平滑移动图形策略解决了因地实时移动而出现的屏幕闪烁问题，使地图注记能动态更新，实现了平滑浏览的功能。

RESEARCH ON DYNAMIC CHINESE ANNOTATION

Based on MAPGIS , this paper discussed some problems about Chinese annotations such as annotation information lost , overlap among annotations , displaying images on time, screen flashing when wandering on electronic map of GPS Automobile Orient Directed System . One rapid and useful method, annotating every fragment of line which was divided evenly, was adopted to solve the problems about information lost, overlap among annotations and so on. The other effective method, moving image smoothly in buffer of memory, was adopted to solve the problem about screen flashing when images of map were moved so that annotations of electronic map can be renewed dynamic, the function of wandering on map smoothly was completed at the same time.