Try argument "mask". This should make all non-polygon area NA (assuming
that's what you want).




On Sun, Oct 31, 2010 at 2:08 AM, Manuel Spínola <mspinola10@gmail.com>wrote:

> Dear list members,
>
> I am trying to use polygonsToRaster function but I am not sure how to
> use it.
> I want to convert  a shapefile to raster.  The shapefile is called
> "cobertura" and I have another of the same extent called "corredor".
> Should I do:
>
> r = raster(corredor)
> r = polygonsToRaster(cobertura, r)
>
> Should I use any other specific argument like overlap or getCover?
>
> Best,
>
> Manuel
>
> --
> *Manuel Spínola, Ph.D.*
> Instituto Internacional en Conservación y Manejo de Vida Silvestre
> Universidad Nacional
> Apartado 1350-3000
> Heredia
> COSTA RICA
> mspinola@una.ac.cr
> mspinola10@gmail.com
> Teléfono: (506) 2277-3598
> Fax: (506) 2237-7036
> Personal website: Lobito de río
> <https://sites.google.com/site/lobitoderio/>
> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>
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-- 
In God we trust, all others bring data.

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