[GRASS-user] r.viewshed for multiple points

Dear list,

I need to calculate a viewshed surface for multiple points (and have, in the end, a single surface of where any of those points can see). In fact this is to deal with the other way around: I want to know, in any position, if it is possible to see back to one of those points modeled.

r.viewshed seems to do the job, but for a single point at a time.
Is there any implementation doing this for multiple points, like a poit vector as input instead of a pair (x,y)?

Thank!
Best wishes
Bernardo

Hi,

sorry for not having searched enough before posting.
I have just found the addon r.viewshed.cvs which seems to do the job!

Best
Bernardo

Em terça-feira, 24 de novembro de 2020 22:56:17 GMT+1, Bernardo Santos bernardo_brandaum@yahoo.com.br escreveu:

Dear list,

I need to calculate a viewshed surface for multiple points (and have, in the end, a single surface of where any of those points can see). In fact this is to deal with the other way around: I want to know, in any position, if it is possible to see back to one of those points modeled.

r.viewshed seems to do the job, but for a single point at a time.
Is there any implementation doing this for multiple points, like a poit vector as input instead of a pair (x,y)?

Thank!
Best wishes
Bernardo

On Tue, Nov 24, 2020 at 11:34 PM Bernardo Santos
<bernardo_brandaum@yahoo.com.br> wrote:

Hi,

sorry for not having searched enough before posting.
I have just found the addon r.viewshed.cvs which seems to do the job!

Glad you found the addon r.viewshed.cva, here the manual page (so that
others can take a look, too):
https://grass.osgeo.org/grass7/manuals/addons/r.viewshed.cva.html

Best,
Markus

Hello Bernardo,

I never use it, but the addon r.viewshed.cva should help you : https://grass.osgeo.org/grass78/manuals/addons/r.viewshed.cva.html

Regards,
Frank

···

Le 24/11/2020 à 22:56, Bernardo Santos a écrit :

Dear list,

I need to calculate a viewshed surface for multiple points (and have, in the end, a single surface of where any of those points can see). In fact this is to deal with the other way around: I want to know, in any position, if it is possible to see back to one of those points modeled.

r.viewshed seems to do the job, but for a single point at a time.
Is there any implementation doing this for multiple points, like a poit vector as input instead of a pair (x,y)?

Thank!
Best wishes
Bernardo

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