[R-sig-Geo] writing tiff/geotiff in R

[Roger Bivand]

On Wed, 11 Jun 2008, Laura Poggio wrote:

> Dear list,
> I managed to read an image in R and to make various elaborations on it,
> mainly clustering. Now I would like to save the results I got as tiff or
> geotiff.
> I found a lot of different examples, but none seems to work.
> Any suggestions on tutorials or code examples for saving clustering results
> as tiff?

First you need to make your object into a SpatialGridDataFrame, then 
writeGDAL in rgdal simply works. But you need to say what structure your 
object has - matrix or vector etc. Then define a GridTopology object to 
suit, add a coordinate reference system if appropriate. Maybe the sp 
package function image2Grid() will help?

Roger

>
> Thank you very much in advance
>
> LP
>
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>
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no