Re: random point interpolation to 2D lat/lon grid

I think natgrid will work. Warning: natgrid can be *slow*

NARR grid: lat2d(N,M), lon2d(N,M)
Random points: LON(npts), LAT(npts), z(npts)
 
                    lat1d = ndtooned( lat2d )
                    lon1d = ndtooned( lon2d )

                    zi = natgrid(LON, LAT, z, lon1d, lat1d) ; ====>
zi(N,M)
 

Beth Hall wrote:
> I have a random point data set that I would like to interpolated to a
> 32-km grid as defined by the NARR data set. Though I see functions
> such as 'natgrid', they all seem to work only if I have 1D lat and lon
> grid coordinates. However, the NARR is a 2D lat/lon grid.
>
> I also found 'triple2grid2d', however this does not interpolate the
> random point data -- it just assigns each point to the neared grid
> location?
>
> I suppose I could also develop a 1D lat/lon grid that is close to the
> the NARR's grid, then somehow regrid the 1D lat/lon grid to the more
> desired 2D lat/lon grid of NARR, but I'm worried that would
> deteriorate the interpolation intention.
>
> Any thoughts on how I can interpolate my point data to the 2D lat/lon
> grid of NARR?
>
> Thanks!
> Beth Hall
>
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Received on Thu Dec 27 2007 - 08:31:10 MST