摘要
针对地形图数据库更新问题,提出一种基于要素的地形图数据更新方法。根据地形图数据更新的特点,将地形图数据的更新分为变化检测和数据入库两部分,在变化检测中利用缓冲区分析、几何量算等方法检测地形图数据中发生变化的要素,并写入临时库,赋予其特定的属性值,根据临时库中变化要素的不同变化情况,对数据库中的数据进行相应的更新操作。实验表明,本文提出的基于要素的地形图数据更新方法能实现地形图数据的更新,具有较大的应用价值。
In order to realize effective topographic database management, this paper proposed a updating method based on topographic features. Considering the characteristics of topographic map data, the method includes two steps：change detection and data loading to the database. In the process of change detection, this paper applied buffer analysis method and geometric calculation method for detecting changes in topographic data and stored the change features to the temporary database. Depending on change types in the temporary database, the update operations will be carried out in the formal database. The Experimental results show that the update method based on topographic feature has a better performance in the process of topographic data updating.
出处
《地理信息世界》
2014年第6期12-16,共5页
Geomatics World
基金
高等学校博士点专项基金(20120171110030)资助
