稀疏断面条件下河道地形插值方法适用性研究OA

This paper compares and studies the applicability of linear interpolation and cubic spline function interpolation in river terrain reconstruction,targeting the data feature of"dense points within the section but sparse spacing between sections".Using our self-developed ArcGIS plugin,we refine the cross-sectional curve through linear interpolation along the cross-sectional direction,and then perform linear or cubic spline interpolation between adjacent sections along the longitudinal direction of the river to generate a digital elevation model(DEM).By controlling the spacing between different cross-sections for experiments,the interpolation accuracy is evaluated using the mean square error and error distribution map.The results indicate that the linear interpolation method has a higher accuracy advantage under sparse cross-section conditions.