Milestone Multivariate interpolation methods
Currently, TOL have a good collection of GSL and AlgLib scalar univariate interpolation methods but no one on higher dimensions. A good bidimensional method is specially required, although methods on higher dimensions will be also wellcome. AlgLib has methods which uses bidimensional splines. Other important class of methods are meshless interpolation.
Note: See
TracRoadmap for help on using
the roadmap.