[R-sig-Geo] reading .grd file in R?

[Rainer Hurling]

Hi Mahalakshmi,

On 09.10.2010 19:22 (UTC+1), govindas at msu.edu wrote:
> Yes, i know its a Grads file ..! i have attached the control file and
> the grid file can be downloaded frm the link given below!
>
> http://www.4shared.com/file/cuSG-05j/rf05_1975.html
>
> I have not used Grads before, still i was able to read in the control
> file and get the basic info.! but, i am not sure about the package
> required for .grd files in R - will i be able to read a Grads grid file
> into R???

I am afraid there is no direct solution at this time in R. Perhaps the 
following script can help converting the data?

http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file

Hope this helps,
Rainer


> Thank u all,
> Mahalakshmi
>
> Quoting Barry Rowlingson <b.rowlingson at lancaster.ac.uk>:
>
>  > On Sat, Oct 9, 2010 at 12:32 AM, <govindas at msu.edu> wrote:
>  >>
>  >>
>  >> Can someone let me know what package and function should be used to
>  >> read *.grd files in R? I tried readGDAL, open.ncdf functions already
>  >> which threw errors for file format mismatch.
>  >
>  >  A file extension is not a good indication of what the file type is. I
>  > could rename any file 'foo.grd' and it could be anything.
>  >
>  >  Show us what readGDAL gives as an error message, and then we might be
>  > able to help. readGDAL tries to guess the file format, maybe it
>  > guessed right but the file is corrupted.
>  >
>  >  Where did the file come from? Can we get it? Can you open it in a
>  > text editor? Do you have a unix/linux box so you can run the command
>  > 'file' on it?
>  >
>  > Barry