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.
出处
《水利水电科技进展》
CSCD
北大核心
2010年第2期79-81,86,共4页
Advances in Science and Technology of Water Resources
