采用ArcGIS平台的地势起伏度自动提取技术研究

Study on the Automatic Extraction Technique of Relief Amplitude Based on the ArcGIS Platform

为解决常规方法提取地势起伏度工作过程繁琐、效率低,以及提取过程中生成大量缓存文件等问题,提出一种地势起伏度自动提取方法。该方法对传统"拐点"理论手工确定最佳统计单元的过程加以改进,利用Python模块编程实现了不同统计单元起伏度值的自动计算和最佳统计单元的自动提取。不同试验区测试结果表明,该方法与常规方法相比,减少了大量不必要缓存文件,操作更为简便,效率明显提高。

Aiming at solving the problems in extracting the relief amplitude by the conventional method, such as low efficiency, tedious work process and excessive amounts of local cache files, the way of extracting relief amplitude automatically was presented. The process of the conventional method was improved in determining the optimum statistical unit in manual way. According to the module of the Python, the relief value in different statistical units and the optimum statistical unit were calculated automatically. The unnecessary cache files were reduced by this method with convenience and high efficiency in compared with the conventional methods in different testing areas.