Juan Fang, North Carolina State University

Accuracy in regridding spatial fields

Abstract: An insidious problem in transforming geophysical fields is the regridding of a surface on one set of grid points to another or the conversion from one resolution to another. This project compares bilinear interpolation, a standard method of regridding, and fast thin plate spline, a method simliar to thin plate splines. Through accuracy study and uncertainty qualification, the thin plate spline method under some circumstances is more accurate than bilinear interpolation but suffers from comparable errors at the boundaries.

Presentation slides (pdf)