河流与地形关系的一致性探测及改正

Consistency detection and correction of relationship between river and terrain

针对地图中河流和地形关系的不一致问题,提出了一种自动探测及改正模型。首先,提取DEM中隐含的河网及汇水区,并对同一汇水区内的河流数据建立自适应缓冲区;然后,通过现有河流和提取的河网缓冲区的重叠情况进行同名河段的匹配及偏离程度的计算,从而探测出不一致情况;最后,采取河流移位和DEM内插两种方法进行改正。实验结果表明:该方法可有效探测河流和地形的不一致关系,并予以自动化改正。

An automatic detection and correction model was proposed to resolve the discrepancy between river and terrain in the map.First of all,the hidden river network was extracted as well as its catchment area in the DEM and an adaptive buffer was established for the river data in the same catchment area.And then the buffer overlap between the existing river and the extracted river network was used to calculate the matching and deviation degree of the river with the same name.Finally,the river migration and DEM Interpolation methods were adopted to correct the inconsistency.Experiments show that this method can effectively detect the inconsistency between river and terrain and automatically correct it.