[GRASS-user] Copy an existing location

[Janet Choate]

Hello GRASS community,
Does anyone have advice on duplicating an existing GRASS location with only
certain rasters maps?
For example, I have an existing GRASS location with a PERMANENT mapset that
contains 100 maps. I want to create a copy of this existing location (with
it's current projection) to a new location, which will only contain 10 of
the rater maps from the existing location.
I want to be able to transfer a new 'cleaned-up' version of my GRASS
location to another user.
thank you,
Janet
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Re: [GRASS-user] Unable to install add-ons on fedora23

[Vaclav Petras]

On Wed, Apr 27, 2016 at 2:35 PM, Salim Razzaz 
wrote:

> the compiled one and installed the rpm instead with grass-devel, liblas,
> and liblas-devel. Now I'm trying to install an add-on but this is happening:
>
> g.extension extension=r.vol.dem --verbose
> Fetching  from GRASS-Addons SVN repository (be patient)...
> ...
>
Compiling...
> ERROR: Please install GRASS development package
>

If you have the GRASS development package installed, you can try to debug
the issue by using -d flag (Download source code and exit). This will give
you directory with the source code and a command to compile. Try also other
addons.
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[GRASS-user] Unable to install add-ons on fedora23

[Salim Razzaz]

Dear GRASS users, I have previously had GRASS 70 compiled from sourcecode and 
was able to install add-ons with g.extension. Few days ago I discovered the rpm 
of GRASS 7.0.3 so I removed the compiled one and installed the rpm instead with 
grass-devel, liblas, and liblas-devel. Now I'm trying to install an add-on but 
this is happening:

g.extension extension=r.vol.dem --verbose
Fetching  from GRASS-Addons SVN repository (be patient)...
Ar.vol.dem/main.c
Ar.vol.dem/r_vol_dem_layerup.jpg
Ar.vol.dem/r.vol.dem.html
Ar.vol.dem/chull.c
Ar.vol.dem/globals.h
Ar.vol.dem/r_vol_dem_layerdown.jpg
Ar.vol.dem/macros.h
Ar.vol.dem/Makefile
Ar.vol.dem/chull.h
 U   r.vol.dem
Checked out revision 68319.
Compiling...
ERROR: Please install GRASS development package

As I'm pretty new in both grass and fedora I'm not really sure what do here. 
grass-devel is surely installed but somehow it is not recognized when running 
the command. 
Any help is appreciated.
Thanks

Salim Razzaz
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Re: [GRASS-user] simple way to get Easting and Northing coordinates of stream outlet directly from r.watershed?

[Jim Maas]

Thanks Stefan,

I guess I should have mentioned, the whole point of all this work is to 
get the appropriate input data, including the topidx map required to run 
topmodel for a two year period, on very small catchments (25km^2 ).  I 
can run either the GRASS or R version of topmodel, but it appears that 
the R version is better equipped to do sensitivity analysis, i.e. pass 
it a parameters file with multiple lines of parameters, through which it 
will iterate and do the sensitivity analysis.  I'm assuming this doesn't 
change your advice?


Thanks

J

On 26/04/16 22:10, Blumentrath, Stefan wrote:

Hi Jim,

If I understood you final objective correctly, I would say 2: r.stream.basins, 
will replace most of your workflow...

With the stream_rast option, r.stream.basisns produces basins using raster input maps 
with "multiple outlets".
You can feed this option either with a raster map of your whole stream (which 
naturally covers the outlet) or even specify categories of the streams  you 
want to get the basisns for. Citing from the manual:

To delineate one or more particular basins defined by given streams, add simply 
stream categories:
r.stream.basins -lc direction=direction stream_rast=streams cats=2,7,184 
basins=bas_basin

See also: https://grasswiki.osgeo.org/wiki/R.stream.*_modules and of course the 
related scientific paper: 
http://www.sciencedirect.com/science/article/pii/S0098300411000975

Hope that helps.

Cheers
Stefan

-Original Message-
From: Jim Maas [mailto:j.m...@uea.ac.uk]
Sent: 26. april 2016 15:44
To: Blumentrath, Stefan ; grass-user@lists.osgeo.org
Subject: Re: [GRASS-user] simple way to get Easting and Northing coordinates of 
stream outlet directly from r.watershed?

Hi Stefan,

Thanks for this.  I've had a look but not tried it yet.  Just for me to 
clarify, are you suggesting that:

  1. r.stream.basins will somehow produce and output the Easting and
 Northing values of the overall outlet?
  2. r.stream.basins, will replace most of this workflow and thus the
 Eastings and Northings will not be required explicitly?

In the case of 1, I can't quite see how it will output these values?

Thanks a bunch,

J

On 26/04/16 14:02, Blumentrath, Stefan wrote:

Hi,

Did you consider using:
https://grass.osgeo.org/grass70/manuals/addons/r.stream.basins.html
?

Cheers
Stefan

-Original Message-
From: grass-user [mailto:grass-user-boun...@lists.osgeo.org] On Behalf
Of Jim Maas
Sent: 26. april 2016 14:28
To: grass-user@lists.osgeo.org
Subject: [GRASS-user] simple way to get Easting and Northing coordinates of 
stream outlet directly from r.watershed?

I'm using GRASS 7.0.3 (text) on Ubuntu Linux, and running it either from a bash 
shell script or from an R file.

I've worked out a workflow that does what I want, but it is very long and 
convoluted, so I'm wondering if there is a simple way to extract the Easting 
and Northing coordinates of the lowest point on the stream network, such that I 
can then use them as inputs for r.water.outlet?

Here is my workflow, realise it is long

   1. run r.watershed to get drainage, streams, and basin  2. run 
r.stream.order to calculate strahler order and get strahler
  raster map
   3. use r.stats and some bash code to extract highest strahler number
  from the strahler map
   4. use r.mapcalc  not sure why, inherited this bit from someone!
   5. use r.stats to get data from stream dem into a text file  6. use some 
bash and awk code to extract the Easting and Northing
  values of the lowest point in the text file created from the stream dem  
7. use r.water.outlet to create new drainage map for the basin  8. use r.lfp  
to calculate longest flow path, also uses the Northing
  and Easting values of the outflow point


So I guess what I'm looking for is a simpler way to get the Northing and 
Easting values of the lowest point, directly from r.watershed or something 
analogous.

All suggestions most welcome. Thanks
J

--
Dr. Jim Maas
University of East Anglia

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--
Dr. Jim Maas
University of East Anglia



--
Dr. Jim Maas
Mathematical Modelling in
Epidemiology of Infectious Disease
Rm 2.13 MED
Norwich Medical School
University of East Anglia
Norwich Research Park,
NR4 7TJ  U.K.

E: j.m...@uea.ac.uk

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