摘要
以3种不同数据源和不同分辨率的DEM数据为基础,着重研究了不同数据源和分辨率对四级水系流域(县级区域)的河网提取的影响。实验表明,对四级水系及其支流的提取并不是分辨率越高越好。从提取的精度角度看,采用航空摄影测量方法得到的DEM的实验结果较为详细。而从分辨率来说,12.5 m分辨率的DEM最好。
Based on three different data sources and different resolution DEM data,this paper researched the different data sources and resolution on the fourth level of river basin(County Area) the influence of drainage network extraction.Experiments' results prove that the extraction of the fourth river and its tributaries is not the higher resolution the better.
出处
《地理空间信息》
2015年第2期159-161,15,共3页
Geospatial Information
关键词
多源DEM
流向
河网提取
宁明县
multisource DEM
flow direction
river network extraction
Ningming County
