[R-sig-Geo] creating a geotiff

[Monica Pisica]

Thanks Barry!
 
I will look into it - for now i have my clumsy code and because my dataset is relatively small it does not matter, but for future this might not be the case.
 
Monica

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> Date: Thu, 13 Aug 2009 15:03:38 +0100
> Subject: Re: [R-sig-Geo] creating a geotiff
> From: b.rowlingson at lancaster.ac.uk
> To: pisicandru at hotmail.com
> CC: r-sig-geo at stat.math.ethz.ch
>
> On Thu, Aug 13, 2009 at 1:35 PM, Monica Pisica wrote:
>>
>> Hi,
>>
>> I have some data as it is required for the function "image" {graphics}, that means a vector x for x coord, a vector y for y coord and a matrix m with x rows and y cols. I want to save this as a geotiff. If i transform my data to take the form of a 3 column data.frame i can use gridded and writeGDAL to obtain my geotiff, but sincerely it seems a little silly to do that. Is there any other way in doing it??? I've tried to transform this data in one of the sp objects but .... i was not able to. Any ideas??
>
> Looking at the code for writeGDAL, it calls create2GDAL which
[[elided Hotmail spam]]
>
> for (i in 1:nbands) {
> band = as.matrix(dataset[i])
>
> It should be possible to write something like create2GDAL that
> operates on a list(x,y,z) structure and avoid converting to sp-classes
> and than back to matrix form. You just need to work out what
> gridparameters(xyzlist) looks like, and then it's a simple cut n paste
> job...
>
> Actually, I think I did start doing that, but I can't find the code at
> the moment....
>
> Barry
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