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

GRASS GRASS user
,
1

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 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

–

Antonello Lobianco
AgroParisTech, Laboratoire d’Economie Forestière
14 Rue Girardet - 54000 Nancy, France
Tel: +33.383396865
Email: antonello.lobianco@nancy.inra.fr
http://antonello.lobianco.org

2

Antonello Lobianco <antonello@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

--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax : +33 - (0)9 58 10 27 44

Fax (D): +49 - (0)3 21 21 25 22 44

email: Rainer@krugs.de

Skype: RMkrug

3

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@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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grass-user@lists.osgeo.org
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4

Start with the docs for 'raster'
http://cran.r-project.org/web/packages/raster/

specifically pg7
http://cran.r-project.org/web/packages/raster/vignettes/Raster.pdf
pg 200
http://cran.r-project.org/web/packages/raster/raster.pdf

In R you'll need to install first:
install.packages(c('rgdal','raster'))
library(raster)
Then you can use the commands in the docs.

Then if you need help try the R-sig-geo mailing list
https://stat.ethz.ch/mailman/listinfo/r-sig-geo

On 02/19/2014 02:36 PM, Rob Bowen wrote:

Hi Alex,

Thanks for the quick response. I am a newbie and will need to get up to
speed on even the basic steps in these programs.

Rob

On Wed, Feb 19, 2014 at 2:26 PM, Alex Mandel <tech_dev@wildintellect.com>wrote:

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@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

_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user