Greetings
I've a Landsat image with 6 bands in Tif format. I need to import into grass, do some processing and export the same band in a Stack.
The import is easy using r.in.gdal but my difficulty is to export 6 bands in one single file. Is it possible using GRASS?
Thanks
Best regards,
Antonio
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2010/5/7 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I've a Landsat image with 6 bands in Tif format. I need to import into
grass, do some processing and export the same band in a Stack.
The import is easy using r.in.gdal but my difficulty is to export 6 bands in
one single file. Is it possible using GRASS?
To my knowledge no.
But you can export it separately, then merge with GDAL tools. See
http://gfoss.blogspot.com/2008/06/gdal-raster-data-tips-and-tricks.html
-> Merge various map/bands into a RGB composite
(should work for more bands than 3).
Markus
2010/5/7 Markus Neteler <neteler@osgeo.org>:
2010/5/7 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I've a Landsat image with 6 bands in Tif format. I need to import into
grass, do some processing and export the same band in a Stack.
The import is easy using r.in.gdal but my difficulty is to export 6 bands in
one single file. Is it possible using GRASS?To my knowledge no.
Sure it is. Create a group in GRASS, export the group (r.out.gdal
input=<group_name>) to a file format that supports multiple bands,
e.g. GeoTIFF.
Markus M
Greetings
Regarding the possibility of exporting an GROUp, using r.in.gldal, the groups are not listed in that menu. So the user cannot see the available groups.
It's still processing but IO have one question: The processing bar restarted at least 3 times, what is happening? Because it file, now, it seems that it's not "growing". Is it doing some file-check or something?
Thanks
Antonio
Markus Metz wrote:
2010/5/7 Markus Neteler <neteler@osgeo.org>:
2010/5/7 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I've a Landsat image with 6 bands in Tif format. I need to import into
grass, do some processing and export the same band in a Stack.
The import is easy using r.in.gdal but my difficulty is to export 6 bands in
one single file. Is it possible using GRASS?
To my knowledge no.
Sure it is. Create a group in GRASS, export the group (r.out.gdal
input=<group_name>) to a file format that supports multiple bands,
e.g. GeoTIFF.Markus M
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2010/5/10 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
Regarding the possibility of exporting an GROUp, using r.in.gldal,
r.out.gdal you mean?
the groups are not listed in that menu. So the user cannot see the available
groups.
g.list type=group
will list all groups
It's still processing but IO have one question: The processing bar restarted
at least 3 times, what is happening?
If you export a group, each raster map is exported separately, even if
they all end up in one file. If you use r.out.gdal --verbose, there
would be several messages like
Exporting raster map <raster_name> (band <number>)...
and for each, the progress bar starts anew.
Because it file, now, it seems that
it's not "growing". Is it doing some file-check or something?
Depending on the grass version you are using, there might be some
checks first to prevent potential data loss (latest 6.4+).
Note that r.out.gdal uses the current computational region (resolution
and extends) for export.
Markus M
Markus Metz wrote:
2010/5/7 Markus Neteler <neteler@osgeo.org>:
2010/5/7 António Rocha <antonio.rocha@deimos.com.pt>:
Greetings
I've a Landsat image with 6 bands in Tif format. I need to import into
grass, do some processing and export the same band in a Stack.
The import is easy using r.in.gdal but my difficulty is to export 6
bands in
one single file. Is it possible using GRASS?To my knowledge no.
Sure it is. Create a group in GRASS, export the group (r.out.gdal
input=<group_name>) to a file format that supports multiple bands,
e.g. GeoTIFF.Markus M
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 5094 (20100507) __________The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature
database 5100 (20100510) __________The message was checked by ESET NOD32 Antivirus.