[GRASS-user] Line of site

GRASS GRASS user
1

Hi,

Does anyone know if I can do a line of site calc in grass? i.e. if I’ve got a point and a dtm, can I calculate all the places this point would be visible from?

Many thanks,
Michael

2

r.los

On Sun, 2011-03-13 at 18:19 +0000, Michael Spencer wrote:

Hi,

Does anyone know if I can do a line of site calc in grass? i.e. if
I've got a point and a dtm, can I calculate all the places this point
would be visible from?

Many thanks,
Michael
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3

Hi,

2011/3/13 Giovanni Manghi <giovanni.manghi@gmail.com>:

r.los

it's quite slow, you can try also r.viewshed from addons [1].

Martin

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.viewshed

--
Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa

4

What about using r.cva?
http://www.ucl.ac.uk/~tcrnmar/GIS/r.cva.html

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5

Thanks for this Martin.

How do I install addons? I’m using GRASS 6.4 on xp. My install was via the QGIS package.

Cheers,
Michael

Date: Sun, 13 Mar 2011 23:45:17 +0100
Subject: Re: [GRASS-user] Line of site
From: landa.martin@gmail.com
To: giovanni.manghi@gmail.com
CC: michael_spencer@live.co.uk; grass-user@lists.osgeo.org

Hi,

2011/3/13 Giovanni Manghi giovanni.manghi@gmail.com:

r.los

it’s quite slow, you can try also r.viewshed from addons [1].

Martin

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.viewshed

–
Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa

6

Michael
It is a C module and I guess you need to compile it.
http://grass.osgeo.org/wiki/Compile_and_Install#Addons

Thanks for this Martin.

How do I install addons? I'm using GRASS 6.4 on xp. My install was via the
QGIS package.

Cheers,
Michael

Date: Sun, 13 Mar 2011 23:45:17 +0100
Subject: Re: [GRASS-user] Line of site
From: landa.martin@gmail.com
To: giovanni.manghi@gmail.com
CC: michael_spencer@live.co.uk; grass-user@lists.osgeo.org

Hi,

2011/3/13 Giovanni Manghi <giovanni.manghi@gmail.com>:
> r.los

it's quite slow, you can try also r.viewshed from addons [1].

Martin

[1] http://grass.osgeo.org/wiki/GRASS_AddOns#r.viewshed

--
Martin Landa <landa.martin gmail.com> * http://geo.fsv.cvut.cz/~landa

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