摘要
高程是描述河道数字化地形图的基础数据,其数据质量直接影响河道地形图的成果应用,因此河道数字化地形图的高程数据质量检查尤为重要。但在河道地形图生产过程中,由于地形数据量大且复杂,高程数据的质量检查与修改工作十分困难。以溪洛渡库区部分河道地形图为例,利用ArcGIS软件提取河道地形图中的高程数据,借助ArcGIS中的3D analyst工具建立河道数字高程模型,并对其分层设色;通过颜色对比,可以快速、准确地找到异常的点或线,高效完成河道地形图高程数据质量检查工作。
Elevations are the basic data needed for drawing the digital topographic map of river channels and the data quality directly affects the application of the topographic map;therefore,conducting data quality check is particularly important.During the generation of river topographic map,due to the large amount of terrain data and their complexity,it is difficult to check and modify the errors.In the light of topographic maps of partial area in the Xiluodu reservoir,ArcGIS software was used to extract the elevation data from the map and a digital elevation model was built using the 3D analyst tool,and then the model was layered and colored.Through color comparison,the abnormal points or lines can be identified instantly and accurately,and the elevation data checking can be completely in an efficient manner.
作者
刘少聪
陈细润
胡创
LIU Shaocong;CHEN Xirun;HU Chuang(Upper Changjiang River Bureau of Hydrological and Water Resources Survey,Chongqing 400000,China)
出处
《水利水电快报》
2020年第10期15-18,共4页
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