Hi all.
What is in short, the difference between the two commands?
Thanks.
--
Paolo Cavallini
See: http://www.faunalia.it/pc
On Tue, Feb 7, 2012 at 1:33 PM, Paolo Cavallini <cavallini@faunalia.it> wrote:
Hi all.
What is in short, the difference between the two commands?
They are completely different.
r.sunmask calculated the sun position for a given date-time,
optionally writing out
a sun cast shadow map (not shaded!)
r.shaded.relief generates a shaded relief from a DEM to be used as
background for
other maps.
Hope this helps,
Markus
Il 07/02/2012 14:43, Markus Neteler ha scritto:
Hope this helps,
Markus
Thanks a lot!
--
Paolo Cavallini
See: http://www.faunalia.it/pc
Paolo wrote:
> What is in short, the difference between the two commands?
Markus N:
They are completely different.
r.sunmask calculated the sun position for a given
date-time, optionally writing out
a sun cast shadow map (not shaded!)
note that r.sun output maps can be used to good effect with
the d.shadedmap module to make a "more-correct" version of a
typical r.shaded.relief image.
e.g. http://bambi.otago.ac.nz/hamish/grass/screenshots/deep_cove_rsun.jpg
perhaps only worth it if you already have the r.sun result in
hand.
r.shaded.relief generates a shaded relief from a DEM to be
used as background for other maps.
(you can place the sun's angle in the sky at whatever angle you
like, but the effect is purely a visual one; r.sunmask uses a
real solar movement algorithm and outputs in shadow/out of
shadow data map)
Hamish
ps- debian has a site set up where you can upload a screenshot
of any package it hosts. I wonder what it would take to set up
a similar thing for GRASS? so people could easily upload a screen
shot of any particular module in action.
http://screenshots.debian.net/package/grass
http://debshots.workaround.org/trac/
(a javascript/Pylons [python web frameworks] dev volunteer
would be needed)
On Wed, Feb 8, 2012 at 9:01 AM, Hamish <hamish_b@yahoo.com> wrote:
...
note that r.sun output maps can be used to good effect with
the d.shadedmap module to make a "more-correct" version of a
typical r.shaded.relief image.e.g. http://bambi.otago.ac.nz/hamish/grass/screenshots/deep_cove_rsun.jpg
perhaps only worth it if you already have the r.sun result in
hand.
Wonderful - for the Wiki / screenshot section!
ps- debian has a site set up where you can upload a screenshot
of any package it hosts. I wonder what it would take to set up
a similar thing for GRASS? so people could easily upload a screen
shot of any particular module in action.
http://screenshots.debian.net/package/grass
http://debshots.workaround.org/trac/
(a javascript/Pylons [python web frameworks] dev volunteer
would be needed)
We had the gallery.osgeo.org site but it was spammed to death...
Markus
note that r.sun output maps can be used to good effect with
the d.shadedmap module to make a "more-correct" version of a
typical r.shaded.relief image.e.g. http://bambi.otago.ac.nz/hamish/grass/screenshots/deep_cove_rsun.jpg
Wow, stunning.
How was it generated?
ps- debian has a site set up where you can upload a screenshot
of any package it hosts. I wonder what it would take to set up
a similar thing for GRASS? so people could easily upload a screen
shot of any particular module in action.
http://screenshots.debian.net/package/grass
http://debshots.workaround.org/trac/
(a javascript/Pylons [python web frameworks] dev volunteer
would be needed)
Yes, good Idea!
shall we enter a trac issue for the website?