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:[email protected]] On Behalf Of Jim
Maas
Sent: 26. april 2016 14:28
To: [email protected]
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
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