基于空间建模的黄柏江流域河网自动提取研究
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摘要
利用ArcGIS模型生成器,以DEM为数据源,以黄柏江流域为研究对象,采用空间建模的方法自动提取黄柏江流域的河网,对比分析不同阈值下提取的河网结果,并结合GoogleEarth对提取的河网进行检验。检验结果表明:不同阈值对低级河网的等级划分有较大影响,且自动提取的河网在地形平缓区域,特别是流域的出口位置误差较大。
Using ArcGIS model Builder, with DEM as the data source and Huangbai River basin as research object, the river network of Huangbai River basin is automatically extracted by spatial modeling method. The results of river network extracted under different thresholds were compared and analyzed, and the extracted river network is checked by GoogleEarth. The results show that different thresholds have a great influence on the classification of low-level river networks, and the automatic extraction of river networks has a large error in the gentle terrain areas, especially at the outlet of the river basin.
Using ArcGIS model Builder, with DEM as the data source and Huangbai River basin as research object, the river network of Huangbai River basin is automatically extracted by spatial modeling method. The results of river network extracted under different thresholds were compared and analyzed, and the extracted river network is checked by GoogleEarth. The results show that different thresholds have a great influence on the classification of low-level river networks, and the automatic extraction of river networks has a large error in the gentle terrain areas, especially at the outlet of the river basin.
引文
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