[R-sig-Geo] GDAL Error - .grd not recognised as a supported file

[Darren Norris]

Hi Barry,
Thanks for the comments -

GDALinfo(input_file)
comes back with the same

Error in .local(.Object, ...) :
        GDAL Error 4: `C:/Users/Darren/Documents/ecology and 
conservation/SP/data_gis/RASTEr/ETOPO1_Ice_g_gdal.grd' not recognised as 
a supported file format.

Does this mean it's not possible to open with packages available in R?
If so I'll try the geotiff and work with a subsample .........
Darren

Barry Rowlingson wrote:
> On Mon, Aug 24, 2009 at 3:29 PM, Darren Norris<doon75 at hotmail.com> wrote:
>
>   
>> Can anyone suggest the simplest way to get this data into R (I'm avoiding
>> the geotif due to bad internet and possible memory limitations on my PC)?
>>     
>
>  Given that its 20,000 by 10,000 pixels you might run into memory
> limitations with any file format.
>
>   
>> readGDAL(input_file)
>>
>> Error in .local(.Object, ...) :
>>       GDAL Error 4: `C:/Users/Darren/Documents/ecology and
>> conservation/SP/data_gis/RASTEr/ETOPO1_Ice_g_gdal.grd' not recognised as a
>> supported file format.
>>     
>
>  Try this in R:
>
>  GDALinfo(input_file)
>
>  Since you are going to have trouble reading the whole dataset with
> readGDAL, it might be easier to use the low-level GDAL functions to
> sample from the whole thing. See help(GDAL.open) and
> help(getRasterData) for more info.
>
> Barry
>
>
>