Evaluation of intertidal single-beam bathymetric spatial interpolation accuracy based on UAV photogrammetry
Aiming at the problems of difficulty in verifying the accuracy of the interpolation model of single-beam bathymetric data,a method based on high-precision UAV data to verify the accuracy of the interpolation model was proposed by using the intertidal tidal law.At low tide,UAV photogrammetry was used to construct a high-precision digital surface model(DSM)of the intertidal zone,and at high tide,the single-beam bathymetry data was obtained and the three-dimensional coordinates of the intertidal topographic points were calculated by combining the global navigation satellite system(GNSS)technology,and constructed an intertidal digital elevation model(DEM)by using the following 4 interpolation methods:Kriging,inverse distance weight,completely regularized spline and natural neighborhood interpolation method.Based on UAV data,the accuracy analysis of intertidal zone DEM was carried out.The results show that:(1)PPK technology-assisted UAV photogrammetry can construct high-precision intertidal zone DSM.(2)In the intertidal zone,UAV data can be used as an evaluation criterion for the accuracy of single-beam bathymetry data.(3)When the seabed topography is relatively flat,the completely regularized spline method has higher accuracy than the other three methods,and the coarse difference rate is 12.5％.
万方数据
维普
