<> From steve@unidata.ucar.edu Wed Mar 25 14:45:43 1992 <> Date: Wed, 25 Mar 1992 13:34:32 -0700 <> From: Steve Emmerson <steve@unidata.ucar.edu> <> To: netcdfgroup@unidata.ucar.edu <> Subject: Re: netCDF: Regularly-spaced coordinates <> <> > I just propose we streighten out more than the issue of the <> >regularly spaced grids. Why don`t we want the whole pie: the concept <> >for storage of grids of different complexity and mathematical <> >generality. I could imagine something like this: <> > <> >general grids ----> quadrilateral ---> rectangular ---> reqularly spaced <> > | / | \ <> > |--> triangular / | \ <> > | linear | other important <> > |--> other logarithmical <> <> Looks like a perfect candidate for a C++ class hierarchy. <> <> Anyone seen such a beast? <> <> Steve Emmerson <steve@unidata.ucar.edu> <> We are looking at the related issue here of representation of multigrid data. Where there is a large, coarse 3-D grid (assume rectangular for sanity), and then subsets of it will be regridded onto a finer mesh. This can be done hierarchically with several layers of increasingly refined subgridding. Multigrid may be the way to handle difficult 3-D fluid dynamics problems, and is being explored by a number of adventurous fluid dynamicists. Any netcdfers have ideas on representation strategies? --Barbara Mihalas bmihalas@ncsa.uiuc.edu