The methods incorporated within s.surf.tps may be found within the following:
Mitasova, H., Mitas, L. (1993) Interpolation by regularized spline with
tension: 1. Theory & Implementation,
Mathematical Geology 25(6), 641-655.
The methods incorporated within s.surf.tps may be found within the following:
Mitasova, H., Mitas, L. (1993) Interpolation by regularized spline with
tension: 1. Theory & Implementation,
Mathematical Geology 25(6), 641-655.