On Fri, 23 Mar 2012, Carlos Grohmann wrote:
To me, in Brazil, I use illumination from NW (315) or NE (045).
Carlos,
Well, it must be Friday because while I meant to assign the azimuth to 225
degrees (southwest), I kept typing 325. No wonder it did not appear correct!
With the sun at the
On Fri, 23 Mar 2012, Carlos Grohmann wrote:
It's just an optical illusion. If you live on the northern hemisphere you
are more 'used' to see images with illumination from the south
Carlos,
Yes, I know that aerial photos should be oriented so the shadows are
toward the bottom of the print. P
Inverted relief on shaded maps (and also on aerial photos or satellite images)
is called pseudoscopy. It's just an optical illusion. If you live on the
northern hemisphere you are more 'used' to see images with illumination from
the south (and vice-versa for southern hemisphere), so when you hav
On Fri, 23 Mar 2012, Micha Silver wrote:
Ooops, Correction: when azimuth=315 the sun is from the *South* West,
producing naturally looking relief maps.
Micha,
You were right the first time. From the manual page, "The azimuth of the
sun in degrees to the east of north (a value between 0 and
On 03/23/2012 09:29 PM, Micha Silver wrote:
On
03/23/2012 08:31 PM, Rich Shepard wrote:
On Fri, 23 Mar 2012, Daniel Lee wrote:
... 235° would be ... from the
southwest.
Yep. That's the way it
On 03/23/2012 08:31 PM, Rich Shepard wrote:
On Fri, 23 Mar 2012, Daniel Lee wrote:
... 235° would be ... from the southwest.
Yep. That's the way it usually works.
It's just an optical illusion. Rota
On Fri, 23 Mar 2012, Daniel Lee wrote:
I can't imagine that resampling would reverse the DEM values though.
Me, neither.
A glance at r.info would give you the answer to that - if the values are
mostly negative, it should be a pretty good sign that you're either in
Death Valley or inverted
Hi Rich,
I can't imagine that resampling would reverse the DEM values though. A
glance at r.info would give you the answer to that - if the values are
mostly negative, it should be a pretty good sign that you're either in
Death Valley or inverted :P
One thing to note with r.shaded.relief though i
