电子地图的自适应注记研究与实现

地图注记的自动配置是地图制图与GIS的难点之一,传统的注记自动配置,采用的算法过于复杂,难以满足电子地图实时响应的要求;而且传统地图采用的是静态注记,而电子地图的屏幕范围有限,往往导致地图视口边界的注记不完整。本文提出一种网格标记法实现注记压盖的快速检测,并基于此方法实现注记配置的压盖避让和动态调整,即注记的自适应配置。实践表明,此方法能有效改善电子地图的显示效果和运行效率,具有较高的实用性。

Research and realization of self-adaptive label in electronic map

The automated placement of the cartographic label is one of difficulties in the field of map making and GIS.The conventional algorithm for automatic name placement is rather complex and it's hard to meet the requirement of real time response.As the conventional map uses static label,while the size of the screen is limited,it often leads to the label at the edge of the screen may be overlaid partially or entirely.A Grid-Mark method realizing the label overlap detection rapidly was presented in this paper.Based on this method,it realized overlap avoiding and dynamic regulation,which means self-adaptive label.As its application proved,this method can improve effectively the disply effect and the operation efficiency of electronic map that is comparatively practical.