[R] Raster extract by polygon generating NAs

[Bert Gunter]

Better posted on the r-sig-geo list, I think.

-- Bert



Bert Gunter

"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )

On Wed, May 16, 2018 at 8:11 AM, Joao Carreiras <j.carreiras using sheffield.ac.uk
> wrote:

> Greetings!
>
> I'm using the extract command (raster package) with a raster layer (x)
> and a spatial polygons dataframe (y). I'm using it to extract the sum
> of raster values by each spatial polygon. However, I'm getting NAs as
> a result for some polygon IDs, which I know isn't true because that
> doesn't happen in ArcGIS.
>
> Does anyone experienced the same issue?
>
> Thanks!
> Joao
>
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