Leni,

If you have raster data in Arc and export as GRID it will create a database
(folder, including a parallel folder called info) that you can treat like a
file and open in R. Alternatively you can export to tif, img (erdas) and
other formats (avoid ascii) that raster can read (most of them via rgdal)
but you cannot export to "grd". If your Arc data are points, then export to
a shapefile and read with e.g. readOGR (rgdal).

Robert

On Wed, Nov 9, 2011 at 5:55 AM, leni <sandra.werb@googlemail.com> wrote:

> Hi,
>
> I want to with raster data generated from a 3D pointcloud in R with the
> package "raster". But I have problems exporting my raster dataset from
> ArcMap. By "export data"/GRID I get a file with an *.aux extension. What I
> need is *.grd.
>
>
> Can anybody help me out?
>
> Cheers,
> Leni
>
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