Fellow Boost Users - I'm interested in doing bivariate interpolation (Shepard's, for example) in C++, and can't find a library with a suitable routine just yet. I've tried Matpack ( http://users.physik.tu-muenchen.de/ gammel/matpack/html/matpack_frame.html ), but found that their class, while seemingly functional, does quite a bit more smoothing than I'd like, and I can't seem to tweak it in any way to make it less aggressive in it's smoothing. Does anyone know of a library/source for a bivariate interpolation method other than Matpack? Boost's Math library seems fairly lightweight, so doesn't seem much help. I apologize if this seems a bit off-topic (as boost doesn't satisfy my need) but it's an interesting library question, so I'm hoping it's not too offensive. Any reommendations as to other lists that might be better suited (and their sign-up URL/info) are also appreciated. - Greg Link