Accuracy Analysis of DEM Based on Coons Surface
Interpolation is the core problem of Digital Elevation Model (DEM). The Coons DEM model is better than bilinear interpolation and moving surface fitting. It is constructed by grid boundary curve, the curve interpolates by some adjoining grid points. Its spatial pattern of error is random in global area, there is no significant global spatial autocorrelation, but it is an increasing trend along with the terrain average gradient increases.There is significant local spatial autocorrelation, the spatial pattern of error converges strongly in local areas.
Zhenyu Du and Bin Liu
Y. G. Wang and P. Y. Wang, "Accuracy Analysis of DEM Based on Coons Surface", Applied Mechanics and Materials, Vol. 65, pp. 214-217, 2011