On Tue, 18 Sep 2001, Randall Hopper wrote: > Ok, this sounds a lot like a terrain-approximating grid used in some of the > atmospheric datasets around here (so much for netCDF being > "self-describing", eh?). > yes, although it is for ice sheet modelling
> Presuming Z(z) is irregularly spaced but uniform for all cells in a Z > slice, you can use a product array of two regular arrays (x & y) and an > explicit array (z) to get your positions. Then have a H(x,y) topography > field you can attach and use to Rubbersheet your grid from X,Y,Z to its > true X,Y,Z~ spatial form when needed. > that is what i did before (well, not using real world coords + rubbersheet) > An M3IO netCDF -to- DX subsetting tool Todd Plessel and Mark Bolstad wrote > a while back uses grid defs like the above to describe netCDF atmospheric > data, also handling this grid warping for terrain-approximating grids, map > projections, etc. If you need more detail let me know. > that sounds very interesting. so yes, i'd like to know more about that. cheers magi ------------- Magnus Hagdorn Department of Geology and Geophysics The University of Edinburgh Grant Institute West Mains Road Edinburgh EH9 3JW Scotland PHONE: (+44) 131 650 5918 FAX: (+44) 131 668 3184 email: [EMAIL PROTECTED]
