From: "Rob Raskin (ECS SL)" Newsgroups: comp.graphics.algorithms,sci.math.num-analysis Subject: Re: 2D interpolation on a sphere Date: Fri, 17 Jan 1997 09:28:23 -0800 Hartmut Schmider wrote: > See: http://www.ncgia.ucsb.edu/pubs/spherekit/main.html . > Hello, > > I hope I am not too off-topic here, but I tried to pick the two > newsgroups that seem close enough. I am looking for fast algorithms for > interpolations on the surface of a sphere. The grid I have consists of > spherical triangles, but has no discernible regularity. I guess the best > way to proceed is to find the three points closest to the interpolation > point (that is the first part of the problem; how to do that without > calculating the distance from all mesh points?), and then to do the actual > interpolation (seems to me the graphics folks must be doing that all the > time). > > Does anyone have suggestions or literature I can look at? If you send me > answers by email, I collect them and repost them after a while. > > Regards, Hartmut "for the ones just as clueless as myself" Schmider > > -- > Hartmut Schmider ~ Remember there's a big difference > Dept. Chem. Queen's University ~ between kneeling down and bending > Kingston, Ontario, K7L 3N6 CANADA ~ over. FZ > hasch@ct3a.chem.queensu.ca ~ -- _________________________________________________________________ Robert Raskin ECS Science Liaison at JPL Mail Stop 525-389 raskin@searider.jpl.nasa.gov Jet Propulsion Laboratory (phone)(818) 306-6061 California Institute of Technology (fax) (818) 306-6929 Pasadena, CA 91109