[GRASS-user] How can I locate points on a river?

GRASS GRASS user
1

Hi all,

I’m trying to identify specific points on the centerline of a river channel by “river mile” , that is, points along a path at specified distances from a starting point — not at regular intervals. Any suggestions how I might go about this?

I’m using GRASS 8.x

Much appreciated…

Tom

2

Hi Tom:

Will v.segment or v.lrs.segment help?

https://grass.osgeo.org/grass82/manuals/v.segment.html

https://grass.osgeo.org/grass82/manuals/v.lrs.segment.html

You’ll need a start point, and a text file with the distances (along the line) for all additional river miles.

Cheers, Micha

···

On 20/06/2022 20:07, Thomas Adams wrote:

Hi all,

I’m trying to identify specific points on the centerline of a river channel by “river mile” , that is, points along a path at specified distances from a starting point — not at regular intervals. Any suggestions how I might go about this?

I’m using GRASS 8.x

Much appreciated…

Tom

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-- 
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
3

Hi Micha!

Thank you for the suggestion — yes, I think so; I just started looking at v.segment… the capability of GRASS continues to amaze me! Your help is much appreciated!

BTW, on a separate note… did you get my email some time ago about revising the “Flood Forecasting: a global perspective” book? Are you and your colleague interested in making any additions or revisions to your book chapter for the 2nd edition? Others reading this, who may be interested, please contact me!

Thank you again!

Best wishes,
Tom

···

Thomas E Adams, III
207 Chowning Place
Blacksburg, VA 24060
tea3rd@gmail.com (personal)
tea@terrapredictions.org (work)

1 (513) 739-9512 (cell)

4
···

On 6/21/22 13:32, Thomas Adams wrote:

Hi Micha!

Thank you for the suggestion — yes, I think so; I just started looking at v.segment… the capability of GRASS continues to amaze me! Your help is much appreciated!

Me too! Now there is the cloud based actinia to run GRASS modules “close to the data”.

BTW, on a separate note… did you get my email some time ago about revising the “Flood Forecasting: a global perspective” book? Are you and your colleague interested in making any additions or revisions to your book chapter for the 2nd edition? Others reading this, who may be interested, please contact me!

Yes, I did. The lead author is employed privately now, so I doubt he’s interested. I contacted the third author, and did not get a very enthusiastic response. Maybe I’ll reach out to the lead author anyway…

Thank you again!

Best wishes,
Tom

On Mon, Jun 20, 2022 at 3:52 PM Micha Silver <tsvibar@gmail.com> wrote:

Hi Tom:

Will v.segment or v.lrs.segment help?

https://grass.osgeo.org/grass82/manuals/v.segment.html

https://grass.osgeo.org/grass82/manuals/v.lrs.segment.html

You’ll need a start point, and a text file with the distances (along the line) for all additional river miles.

Cheers, Micha

On 20/06/2022 20:07, Thomas Adams wrote:

Hi all,

I’m trying to identify specific points on the centerline of a river channel by “river mile” , that is, points along a path at specified distances from a starting point — not at regular intervals. Any suggestions how I might go about this?

I’m using GRASS 8.x

Much appreciated…

Tom

_______________________________________________
grass-user mailing list
[grass-user@lists.osgeo.org](mailto:grass-user@lists.osgeo.org)
[https://lists.osgeo.org/mailman/listinfo/grass-user](https://lists.osgeo.org/mailman/listinfo/grass-user)


-- 
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918

–

Thomas E Adams, III
207 Chowning Place
Blacksburg, VA 24060
tea3rd@gmail.com (personal)
tea@terrapredictions.org (work)

1 (513) 739-9512 (cell)

-- 
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918
[https://orcid.org/0000-0002-1128-1325](https://orcid.org/0000-0002-1128-1325)