地形图数据规整及变化要素自适应更新方法  

Research on Topographic Map Data Regularizing and Adaptive Updating

作　　者：张新长[1,2] 高金顶 何显锦[1] 

机构地区：[1]中山大学地理科学与规划学院,广东广州510275 [2]广东省城市化与地理环境空间模拟重点实验室,广东广州510275

出　　处：《地理空间信息》2016年第3期1-4,7,共4页Geospatial Information

基　　金：国家自然科学基金重点项目资助项目(41431178);高等学校博士点专项科研基金资助项目(20120171110030)

摘　　要：地形图数据作为一种重要的空间数据,其更新一般包括数据规整和更新入库2个过程。提出了一套地形图数据规整及自适应更新方法。该方法在Auto CAD环境下对地形图数据进行规整,包括地物编码、拓扑检查编辑、数据转换等;在数据规整的基础上,进行要素的变化检测,提取出变化的要素,再对变化要素进行更新入库。实验表明,该方法能系统、高效地实现地形图数据的更新。The regularizing and updating of database are two main processes in updating of topographic map data, which is a kind of fundamental spatial data. A framework of topographic map data regularizing and updating was proposed in this paper. In order to transform CAD format data to GIS data efficiently and accurately, we standardized CAD format data of topographic data by means of feature coding, topology checking and it's editing and data conversion. After the conversion of CAD format data, we proposed a highly efficient method of change detection based on the grid-partitioning of data, and employed it to extract changing elements and update them to database. The test results show that the proposed adaptive updating method can efficiently discover changed elements and update them.

关 键 词：地形图 数据规整 变化检测 增量更新 

分 类 号：P208[天文地球—地图制图学与地理信息工程]