just the ticket - thank you Hendrik!
>________________________________
>From: Hendrik Hoeth <[email protected]>
>To: Rebecca Bennett <[email protected]>
>Cc: [email protected]
>Sent: Monday, 25 July 2011, 22:24
>Subject: Re: [GRASS-user] mapcalc
>
>Thus spake Rebecca Bennett ([email protected]):
>
>> I would like to use r.mapcalc to fill the null cells of one raster
>> with the value of the same cells from in a second raster (while
>> leaving all other cells as they are in the first raster).
>
>rasterA="if(isnull(rasterA), rasterB, rasterA)"
>
>--
>A man without a dream in his heart already has one foot in the grave.
>
>
>
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