[GRASS-user] How to import R-generated .gri/.grd raster files in grass ?

[Alex Mandel]

More information:
http://cran.r-project.org/web/packages/raster/vignettes/rasterfile.pdf
So yes easiest option is to open with R and use the raster package/rgdal
to save it out to another format that GRASS can read.


Maybe we should ask gdal to add the format, seems easy enough and I know
the author of raster would be fine with it. Anyone on the gdal list want
to forward the idea.

Thanks,
Alex


On 02/19/2014 06:43 AM, Rainer M Krug wrote:
> Antonello Lobianco <antonello at lobianco.org> writes:
> 
>> I received some data in .grd + .gri format, where the first one is a small
>> text file and the second one (having the same name) is a medium/large
>> binary file.
> 
> I don't think you can. This is, as far as I remember, an internal format
> of the raster package in R to save raster data.
> You effectively have two options:
> 
> 1) use R and the raster package to load the data and to save it in a
> different format
> 
> 2) ask the person to do it for you
> 
> Hope this helps,
> 
> Rainer
> 
>>
>> I am unable to open them in grass/qgis (I may have not tried all the
>> options.. but almost all!).
>>
>> Any hint ? Which grid format is it ? Am I missing some library ? I tried to
>> use google but unfortunately "r" word is too small, and it ends to refer
>> always to the r.* commands in grass...
>>
>> This is the content of the .grd file:
>>
>> [general]
>> creator=R package 'raster'
>> created= 2013-12-14 15:44:30
>> [georeference]
>> nrows= 134
>> ncols= 143
>> xmin= 56000
>> ymin= 1613000
>> xmax= 1200000
>> ymax= 2685000
>> projection= NA
>> [data]
>> datatype= FLT8S
>> byteorder= little
>> nbands= 5
>> bandorder= BIL
>> minvalue= 0:0:0:0:0
>> maxvalue= 0.945:1:1:1:1
>> nodatavalue= -1.7e+308
>> [legend]
>> legendtype=
>> values=
>> color=
>> [description]
>> layername= Value:Twin:Psum:pH:CN
>> history=
>>
>> Thank you,
>>
>>        Antonello
> 
> 
> 
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