[GRASSLIST:1084] Re: Reproject raster data - weighted average

[Paul Kelly]

Hello
Not totally clear on what you mean if 'r.proj method=bilinear' does not work
for you, what about convering the original raster to sites with r.to.sites
and then re-projection with s.proj, and use one of the various
interpolation methods (e.g. s.surf.idw or s.surf.rst) to get the raster
you want in the new location? Appropriate solution sort of depends on the
relative cell resolutions of the two locations, which you didn't mention.

Paul

On Tue, 2 Sep 2003, David Orme wrote:

> Hi,
>
> I have some floating point raster data sets in a lat/long location. I
> want to reproject these data into a cylindrical equal area location.
> Obviously I can do this using `r.proj'  but I want the values of cells
> in the reprojected map to be calculated as averages of the
> corresponding cells in the original projection, weighted by their
> relative area in the new grid cells.
>
> Is there any way to do this in Grass?
>
> Thanks,
> David
>
>