I have a raster (say r) and a polygon shapefile (say s, containing many polygons). I want to convert the pixelated r to mean of s boundaries. And I need these boundary means as another raster file.

What I have now is the extract function:

rmean <- extract(r,s,fun=mean,df=TRUE)

but, I am not able to convert this into a raster.

Thanks in advance for help.

  • Have you tried with raster::rasterize() function? if so, did it work? It would be easier to help you if you give us a reproducible example Jun 11 '20 at 15:21

Assign the values to the polygons and then rasterise the polygons on that value.

Using polys and r from example(extract):

> polys$r = extract(r, polys, fun=mean)
> rp = rasterize(polys, r, "r")
> plot(rp)

enter image description here

  • Perfect, thanks!
    – nube719
    Jun 11 '20 at 16:03

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