河道地形数据GIS入库方法  

Import of river terrain data into GIS database

作　　者：丁龙远[1] 聂时贵[1] 陶冬冬[2] 赵崇亮 

机构地区：[1]江苏省基础地理信息中心,江苏南京210013 [2]河海大学水文水资源学院,江苏南京210098

出　　处：《水利水电科技进展》2010年第2期79-81,86,共4页Advances in Science and Technology of Water Resources

摘　　要：针对CAD河道地形数据的空间分析能力弱、使用范围窄等特点,采用GIS技术对CAD河道地形数据进行转换和入库。在数据转换和入库过程中对涉及的高程点数据获取、等高线高程确定、高程数据粗差探测等方面进行研究,实现了在少量人工质量控制的前提下高效率地将CAD河道地形数据向GIS数据自动转换与入库。该高程数据提取方法具有准确、快捷和实用的特点。With regard to the defieieneies of weak spatial analysis eapaeity and narrow application scope of CAD river terrain data, the CAD river terrain data were converted and imported by use of the GIS teehnology. The processing method to import the CAD river terrain data into the GIS database was studied, including the data acquisition of elevation points, the determination of elevation eontours and the cheek of data errors. The automatic conversion and import of the CAD river terrain data into the GIS database were realized under the quality control by a little manual work. The proposed method to extraet elevation data is aeeurate, fast and practical.

关 键 词：AUTOCAD 河道地形数据 GIS 数据转换 数据入库 数据误差 

分 类 号：P208[天文地球—地图制图学与地理信息工程]