Re: [GRASS-user] help with batch exporting r.out.gdal
Thank you Tom for the mail. I'm still unable to get it working. Some smaller cliche I guess, will try again. Regards Rajat Nayak On Tue, Sep 2, 2014 at 6:50 PM, Thomas Adams tea...@gmail.com wrote: Rajat, I assume you are running this at the GRASS prompt? If not, you must do this. Also, if you don't provide the full path for 'NPPFILES', you should run the command from the directory where 'NPPFILES' is located. Additionally, you may want to change your code to this: for files in $(cat NPPFILES); do echo $files; r.out.gdal input=$NPPFILES output=$NPPFILES.tiff format=GTiff ; done You may want to include the line echo $files; to see if the individual map names are being read correctly Regards, Tom On Tue, Sep 2, 2014 at 8:57 AM, Rajat Nayak rajat27...@gmail.com wrote: Dear All, I just created a list of files (NPPFILES) using g,mlist command in grass7. Now I would like to export these files as .tiff files. I tried this command for files in $NPPFILES; do r.out.gdal input=$NPPFILES output=$NPPFILES.tiff format=GTiff ; done This is not working for me. I tried giving directory path, still no result. I will be grateful if anybody can help me with this. Thanking you, Regards Rajat Nayak ___ 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
Re: [GRASS-user] help with batch exporting r.out.gdal
Rajat Nayak rajat27...@gmail.com wrote:
I just created a list of files (NPPFILES) using g,mlist command in
grass7. Now I would like to export these files as .tiff files.
I tried this command
for files in $NPPFILES; do
r.out.gdal input=$NPPFILES output=$NPPFILES.tiff format=GTiff ; done
Here, you ask the string files to get each of the whatsoever values
are stored inside the variable $NPPFILES.
1. is there an NPPFILES variable defined already? Something like
NPPFILES=
file_1
file_2
flie_3
2. What you actually need to feed the input= parameter, is the files
term, not the $NPPFILES.
This is not working for me. I tried giving directory path, still no
result.
ok, assuming you are running this from inside a GRASSy session, you
should be, at the time of executing the for loop, inside the directory
where the list of files is also present. I guess you created a file,
say nppfiles_list.
To be sure, just instruct
cat nppfiles_list
and expect to get the list of files you created.
If that's ok, then it should work, e.g.:
for File in `cat nppfiles_list`; do r.out.gdal input=${File}
output=${File}.tiff; done
Note, instead of File it could be any other string you like.
Hope this helps a bit.
Nikos
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Re: [GRASS-user] help with batch exporting r.out.gdal
Thank you Nikos and Tom.
The command worked.
This is what I used,
for files in `cat NPPFILES`; do r.out.gdal in=${files} out=${files}
format=GTiff; done
Regards
Rajat Nayak
On Thu, Sep 4, 2014 at 12:39 PM, Nikos Alexandris n...@nikosalexandris.net
wrote:
Rajat Nayak rajat27...@gmail.com wrote:
I just created a list of files (NPPFILES) using g,mlist command in
grass7. Now I would like to export these files as .tiff files.
I tried this command
for files in $NPPFILES; do
r.out.gdal input=$NPPFILES output=$NPPFILES.tiff format=GTiff ;
done
Here, you ask the string files to get each of the whatsoever values
are stored inside the variable $NPPFILES.
1. is there an NPPFILES variable defined already? Something like
NPPFILES=
file_1
file_2
flie_3
2. What you actually need to feed the input= parameter, is the files
term, not the $NPPFILES.
This is not working for me. I tried giving directory path, still no
result.
ok, assuming you are running this from inside a GRASSy session, you
should be, at the time of executing the for loop, inside the directory
where the list of files is also present. I guess you created a file,
say nppfiles_list.
To be sure, just instruct
cat nppfiles_list
and expect to get the list of files you created.
If that's ok, then it should work, e.g.:
for File in `cat nppfiles_list`; do r.out.gdal input=${File}
output=${File}.tiff; done
Note, instead of File it could be any other string you like.
Hope this helps a bit.
Nikos
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[GRASS-user] raster exchange between GRASS and R with nodata
Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] raster exchange between GRASS and R with nodata
You probably have good reasons for your work flow, but just to make sure: is there a specific reason to export to geotiff first? It seems easier to import the raster layer directly from GRASS into R using the spgrass6 package (readRAST6)? You can subsequently convert the spatial raster to the raster format. On Thu, Sep 4, 2014 at 11:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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
[GRASS-user] help with r.series
Dear All, I have created a few list using g.mlist command in grass7. Each list has a few raster layers. For example; FILE2000 has lists of all monthly layers for the year 2000, FILE2001 has layers for 2001...so on. Now I want to create one layer each for each of these lists (each year). I can use r.series command with method=average, to get a layer with averaged values across all the months for a particular year. Now I have 14 such lists corresponding to 14 years and do not want to repeat the process for each year. Is there a way to automate this process using grass prompt? I don't want to move to R, would like to complete all the work in GRASS. Thank you Regards Rajat Nayak ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] raster exchange between GRASS and R with nodata
Johannes, If you want to read your file into R, there is no need to export your map from GRASS to do this. Simply install and use the R contributed package 'spgrass6' (spgrass6 has R dependencies that need to be installed first); it works wonderfully: Within GRASS, at the GRASS terminal prompt... library(spgrass6) Loading required package: sp Loading required package: XML GRASS GIS interface loaded with GRASS version: GRASS 7.0.0beta3 (2014) and location: ohrfc_mpe dat-readRAST6(xmrg0101200306z) image(dat) This is far more efficient. Tom On Thu, Sep 4, 2014 at 5:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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
Re: [GRASS-user] help with r.series
Hi Rajat,
On Thu, Sep 4, 2014 at 1:51 PM, Rajat Nayak rajat27...@gmail.com wrote:
I have created a few list using g.mlist command in grass7. Each list has a
few raster layers. For example; FILE2000 has lists of all monthly layers for
the year 2000, FILE2001 has layers for 2001...so on.
Now I want to create one layer each for each of these lists (each year). I
can use r.series command with method=average, to get a layer with
averaged values across all the months for a particular year. Now I have 14
such lists corresponding to 14 years and do not want to repeat the process
for each year. Is there a way to automate this process using grass prompt? I
don't want to move to R, would like to complete all the work in GRASS.
Yes you can do it, using BASH or python, personally I prefer/use python.
A possible solution for grass6/7 could be something like:
{{{
from grass import script
# define the pattern to select the maps that will be aggregate
PATTERNS = ('rast2001*', 'rast2002*', 'rast2003*') # etc.
# define the name of the output names
OUTPUTS = ('out2001', 'out2002', 'out2003')
# start a cycle for each pattern and for each output
for pattern, output in zip(PATTERNS, OUTPUTS):
# get the list of input maps
inputs = script.mlist_strings('rast', pattern=pattern)
# run your command
script.run_command('r.series', input=inputs, output=output,
method='average')
}}}
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Re: [GRASS-user] raster exchange between GRASS and R with nodata
Hi all, of course it is possible to load the raster maps directly via spgrass6. However, we use this work flow also to exchange some of the maps between different users (e.g. via email) and to permanently store single files (geotiffs that contain the proj information within the file). So, I agree that using spgrass6 would be much more efficient, but I'll stick to exporting to geotiffs and so I need to solve the issues with NA's. /Johannes On Thu, Sep 4, 2014 at 2:31 PM, Thomas Adams tea...@gmail.com wrote: Johannes, If you want to read your file into R, there is no need to export your map from GRASS to do this. Simply install and use the R contributed package 'spgrass6' (spgrass6 has R dependencies that need to be installed first); it works wonderfully: Within GRASS, at the GRASS terminal prompt... library(spgrass6) Loading required package: sp Loading required package: XML GRASS GIS interface loaded with GRASS version: GRASS 7.0.0beta3 (2014) and location: ohrfc_mpe dat-readRAST6(xmrg0101200306z) image(dat) This is far more efficient. Tom On Thu, Sep 4, 2014 at 5:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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
Re: [GRASS-user] raster exchange between GRASS and R with nodata
Hello! Did you try this one? *r.out.gdal etc nodata*=*'NA'* On 4 September 2014 14:27, Johannes Radinger johannesradin...@gmail.com wrote: Hi all, of course it is possible to load the raster maps directly via spgrass6. However, we use this work flow also to exchange some of the maps between different users (e.g. via email) and to permanently store single files (geotiffs that contain the proj information within the file). So, I agree that using spgrass6 would be much more efficient, but I'll stick to exporting to geotiffs and so I need to solve the issues with NA's. /Johannes On Thu, Sep 4, 2014 at 2:31 PM, Thomas Adams tea...@gmail.com wrote: Johannes, If you want to read your file into R, there is no need to export your map from GRASS to do this. Simply install and use the R contributed package 'spgrass6' (spgrass6 has R dependencies that need to be installed first); it works wonderfully: Within GRASS, at the GRASS terminal prompt... library(spgrass6) Loading required package: sp Loading required package: XML GRASS GIS interface loaded with GRASS version: GRASS 7.0.0beta3 (2014) and location: ohrfc_mpe dat-readRAST6(xmrg0101200306z) image(dat) This is far more efficient. Tom On Thu, Sep 4, 2014 at 5:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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 -- Nuno César de Sá +351 91 961 90 37 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] raster exchange between GRASS and R with nodata
On Thu, Sep 4, 2014 at 3:38 PM, Nuno Sá nunocesard...@gmail.com wrote: Hello! Did you try this one? *r.out.gdal etc nodata*=*'NA'* As mentioned in the manual of r.out.gdal, the no data parameter takes only float values and no strings like 'NA'. Without stating as specific value in GRASS, this nodata-value is automatically set to e.g. 65535 for DCELL rasters if I remember correctly and to 255 for BYTE rasters. However, this seems not to be recognized when imported into R with the package 'raster'. /Johannes On 4 September 2014 14:27, Johannes Radinger johannesradin...@gmail.com wrote: Hi all, of course it is possible to load the raster maps directly via spgrass6. However, we use this work flow also to exchange some of the maps between different users (e.g. via email) and to permanently store single files (geotiffs that contain the proj information within the file). So, I agree that using spgrass6 would be much more efficient, but I'll stick to exporting to geotiffs and so I need to solve the issues with NA's. /Johannes On Thu, Sep 4, 2014 at 2:31 PM, Thomas Adams tea...@gmail.com wrote: Johannes, If you want to read your file into R, there is no need to export your map from GRASS to do this. Simply install and use the R contributed package 'spgrass6' (spgrass6 has R dependencies that need to be installed first); it works wonderfully: Within GRASS, at the GRASS terminal prompt... library(spgrass6) Loading required package: sp Loading required package: XML GRASS GIS interface loaded with GRASS version: GRASS 7.0.0beta3 (2014) and location: ohrfc_mpe dat-readRAST6(xmrg0101200306z) image(dat) This is far more efficient. Tom On Thu, Sep 4, 2014 at 5:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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 -- Nuno César de Sá +351 91 961 90 37 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] raster exchange between GRASS and R with nodata
Ok, didn't check that before since I didn't have the same problem before. Try exporting with a crazy value as NA such as in a 16bit unsigned r.out.gdal etc nodata=65535 Then on R use the mask function such as: mask(x, mask, filename=, inverse=FALSE, maskvalue=65535, updatevalue='NA', ...) might work but its very, you know, hurtful to see :P but I'm like you, I prefer .tif. On 4 September 2014 14:47, Johannes Radinger johannesradin...@gmail.com wrote: On Thu, Sep 4, 2014 at 3:38 PM, Nuno Sá nunocesard...@gmail.com wrote: Hello! Did you try this one? *r.out.gdal etc nodata*=*'NA'* As mentioned in the manual of r.out.gdal, the no data parameter takes only float values and no strings like 'NA'. Without stating as specific value in GRASS, this nodata-value is automatically set to e.g. 65535 for DCELL rasters if I remember correctly and to 255 for BYTE rasters. However, this seems not to be recognized when imported into R with the package 'raster'. /Johannes On 4 September 2014 14:27, Johannes Radinger johannesradin...@gmail.com wrote: Hi all, of course it is possible to load the raster maps directly via spgrass6. However, we use this work flow also to exchange some of the maps between different users (e.g. via email) and to permanently store single files (geotiffs that contain the proj information within the file). So, I agree that using spgrass6 would be much more efficient, but I'll stick to exporting to geotiffs and so I need to solve the issues with NA's. /Johannes On Thu, Sep 4, 2014 at 2:31 PM, Thomas Adams tea...@gmail.com wrote: Johannes, If you want to read your file into R, there is no need to export your map from GRASS to do this. Simply install and use the R contributed package 'spgrass6' (spgrass6 has R dependencies that need to be installed first); it works wonderfully: Within GRASS, at the GRASS terminal prompt... library(spgrass6) Loading required package: sp Loading required package: XML GRASS GIS interface loaded with GRASS version: GRASS 7.0.0beta3 (2014) and location: ohrfc_mpe dat-readRAST6(xmrg0101200306z) image(dat) This is far more efficient. Tom On Thu, Sep 4, 2014 at 5:32 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I want to export a raster map (FCELL) from GRASS70 to the geotiff format using r.out.gdal and to import it later on in R. The map contains many no data values. Here some details about the raster: Type of Map: raster Number of Categories: 0 Data Type:FCELL Rows: 750 Columns: 750 Total Cells: 562500 total null and non-null cells: 15105636 total null cells: 15105047 So when I export the map, r.out.gdal reports: Input raster map contains cells with NULL-value (no-data). The value -nan will be used to represent no-data values in the input map. You can specify a nodata value with the nodata option. When I subsequently try to import the geotiff into R (using the package 'Raster') the nodata values are not recognised as NA's: a - raster(*.tif) summary(a) Min. 0.5294496 1st Qu. 0.7171210 Median 0.7871540 3rd Qu. 1.1581826 Max. 1.5494517 NA's 0.000 So I am wondering if I need to set any specific parameter during the export (r.out.gdal) or import (raster()). As I am not only exporting FCELL (Float32) raster but also multiple (N=500) other rasters to R I would be interested in a solution also for DCELL (Float64). Of course I can export all of as Float64 as the file size should not be a problem. Any suggestions or experiences of handling NA's during raster exchange between GRASS and R? /Johannes ___ 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 -- Nuno César de Sá +351 91 961 90 37 -- Nuno César de Sá +351 91 961 90 37 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.clump2 for GRASS7
On Wed, Sep 3, 2014 at 11:17 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, I am just wondering if the add-on r.clump2 is still available for GRASS 7. I can find the add-on manual mentioned here: http://grass.osgeo.org/grass70/manuals/addons/r.clump2.html ok, I have removed that page now because... However I could not find r.clump2 via g.extension. ... the functionality of r.clump2 and been merged into the standard r.clump in GRASS 7. I seems that the list http://grass.osgeo.org/grass70/manuals/ is out of date (e.g. r.fidimo add-on is missing). Good point. I'll speak to Martin Landa that we need to clean the directory and update it via cronjob. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] GRASS GIS code sprint @FOSS4G 2014 - Portland: Sept 13th, 2014
Join us at the upcoming GRASS GIS code sprint @FOSS4G 2014, Portland http://grasswiki.osgeo.org/wiki/GRASS_Community_Sprint_Portland_2014 This Portland FOSS4G Code Sprint 2014 is a great occasion for folks to support the development by actively contributing to the source code, manuals or likewise. This code sprint is targeting members of OSGeo software projects. We will aim at getting close to the GRASS GIS 7.0.0 release, especially discussing how to resolve the remaining blocking issues. Please don't hesitate to add your suggestions here: http://grasswiki.osgeo.org/wiki/GRASS_Community_Sprint_Portland_2014#Ideas ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] rasterize vector layer (string column)
hello i would like to rasterize a vector layer i guess within: *v.to.rast* but the type of the column to use in the rasterization is string not numeric *.* is it possible to do it in grass 6.4 ? *thank you* ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] rasterize vector layer (string column)
On Thu, Sep 4, 2014 at 4:56 PM, christophe joey christophe0j...@gmail.com wrote: hello i would like to rasterize a vector layer i guess within: v.to.rast but the type of the column to use in the rasterization is string not numeric. is it possible to do it in grass 6.4 ? Yes. - use v.db.addcol to add a new numeric column - then cast the string numbers to numeric with v.db.update: http://grass.osgeo.org/grass64/manuals/v.db.update.html -- see last example (that's for the SQLite or other true SQL drivers only, not the DBF backend) Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] help with r.series
Rajat Nayak wrote:
I have created a few list using g.mlist command in grass7. Each list has a
few raster layers. For example; FILE2000 has lists of all monthly layers
for the year 2000, FILE2001 has layers for 2001...so on.
Now I want to create one layer each for each of these lists (each year). I
can use r.series command with method=average, to get a layer with
averaged values across all the months for a particular year. Now I have 14
such lists corresponding to 14 years and do not want to repeat the process
for each year. Is there a way to automate this process using grass prompt?
I don't want to move to R, would like to complete all the work in GRASS.
bash:
for file in FILE20?? ; do
r.series file=$file output=output${file#file} method=average
done
Python:
import os
import grass.script as grass
for file in os.listdir('.'):
if not file.startswith('FILE20'):
continue
output = 'output' + file[4:]
grass.run_command('r.series', file=file, output=output,
method='average')
--
Glynn Clements gl...@gclements.plus.com
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