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I made some renderings of planet earth; color & topography.
Medium-resolution images at:
http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/earth/
I'll make some high-res images but first would like to get some
comments.
Regards,
Wolfgang
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Wolfgang Wieser wrote:
> I'll make some high-res images but first would like to get some
> comments.
I want the full-planet DEM data and whatever you used to make it
into the actual bumpy earth. ^_^
--
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------
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> I want the full-planet DEM data and whatever you used to make it
> into the actual bumpy earth. ^_^
>
"I didn't post the source because the raw DEM data alone is 1.8 Giga" :)
I hope your inbox is large enough...
Wolfgang
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They look very nice!
Are the heights on a real scale? I saw Africa-Europe image and it seems to
me that the elevations are exagerated, but perhaps I have a wrong intuition.
Fernando.
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Wolfgang Wieser wrote:
>
> I made some renderings of planet earth; color & topography.
> Medium-resolution images at:
>
> http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/earth/
>
> I'll make some high-res images but first would like to get some
> comments.
news://news.povray.org/3E89FD53.12F835E6%40gmx.de
http://news.povray.org/povray.binaries.images/31083/220908/#220908
:-)
I'm not sure how you render the 1/60 degree topography with 1/30 degree
color with only 600Mb memory - according to my calculations this would
take more.
I'd strongly reduce the height exaggeration (with 2 km grid 5x-10x should
give quite pleasant results)
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 17 Jun. 2003 _____./\/^>_*_<^\/\.______
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Wolfgang Wieser wrote:
> "I didn't post the source because the raw DEM data alone is 1.8 Giga" :)
> I hope your inbox is large enough...
O.o;;
Wow. I wonder how I could get my hands on that...
--
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------
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> I made some renderings of planet earth; color & topography.
> Medium-resolution images at:
>
> http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/earth/
>
> I'll make some high-res images but first would like to get some
> comments.
It's very nice, but elevations are exaggerated, IMHO. A small tweak, I'm
sure.
Regards,
Roberto
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"Fernando Gonzalez del Cueto" <fgd### [at] hotmail com> wrote
> They look very nice!
>
> Are the heights on a real scale? I saw Africa-Europe image and it seems to
> me that the elevations are exagerated, but perhaps I have a wrong
intuition.
You are right. With the correct scale, max elevation would be fraction of a
pixel at that resolution and thus rather imperceptible.
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Fernando Gonzalez del Cueto wrote:
> Are the heights on a real scale? I saw Africa-Europe image and it seems to
> me that the elevations are exagerated, but perhaps I have a wrong
> intuition.
>
As explained in the text above the images, the height (and the atmosphere)
is scaled by a factor of 30.
Otherwise Earth would be boringly flat ;)
Wolfgang
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Christoph Hormann wrote:
> news://news.povray.org/3E89FD53.12F835E6%40gmx.de
> http://news.povray.org/povray.binaries.images/31083/220908/#220908
>
> :-)
>
I know you did some similar things although I did not have the image
in memory very well. Gonna look at them again...
> I'm not sure how you render the 1/60 degree topography with 1/30 degree
> color with only 600Mb memory - according to my calculations this would
> take more.
>
Let's see:
Topo is 1/60 degree, hence 21600 x 10800 pixels, i.e. 222 mega-pixels.
Thus, I need 444 Mb of height data (it's 2 byte).
Adding 1/30 degree RGB color, 10800 x 5400 x 3 = 167 Mb
Together, that's 611 Mb.
POVRay actually uses 620 Mb VM (according to the kernel).
I wonder where I could habe failed to calculate that correctly ;)
> I'd strongly reduce the height exaggeration (with 2 km grid 5x-10x should
> give quite pleasant results)
>
Hmm... Maybe I'll give it a try.
My Mars images use height exaggeration of 10. But Mars has more
extreme topography.
http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/mars/
(Take the 2048x1536 JPEG to see the craters.)
Wolfgang
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Wolfgang Wieser <wwi### [at] gmxde> escribió en el mensaje de noticias
3f20165c@news.povray.org...
> I made some renderings of planet earth; color & topography.
> Medium-resolution images at:
>
> http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/earth/
>
> I'll make some high-res images but first would like to get some
> comments.
Beautiful images. The exagerated heights add a nice touch
(surrealistic?). The image from Mars is the one I like most.
Seems like a planet from the little prince.
Keep on working on it.
Bye
Txemi Jendrix
http://www.txemijendrix.com
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Hey Wolfgang!
Great Images! Are we going to see some of the other planets, too?
> But Mars has more extreme topography.
Could you give us some figures, like deepest valley/highest peak?
Florian
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Nice work Wolfgang
I like the exagerated topography :)
Just 3 things:
Animation, Animation, Animation :)
(If at all possible)
Dave.
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Wolfgang Wieser wrote:
>
> [...]
> Topo is 1/60 degree, hence 21600 x 10800 pixels, i.e. 222 mega-pixels.
> Thus, I need 444 Mb of height data (it's 2 byte).
> Adding 1/30 degree RGB color, 10800 x 5400 x 3 = 167 Mb
> Together, that's 611 Mb.
> POVRay actually uses 620 Mb VM (according to the kernel).
All right, my quick estimate was a bit high. I remembered that the data
of my renders i posted the link for would have taken more than 3 Gb as a
whole but i use 1 km resolution for both the topography and the coloring
(and clouds in some cases).
> > I'd strongly reduce the height exaggeration (with 2 km grid 5x-10x should
> > give quite pleasant results)
> >
> Hmm... Maybe I'll give it a try.
> My Mars images use height exaggeration of 10. But Mars has more
> extreme topography.
>
> http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/mars/
> (Take the 2048x1536 JPEG to see the craters.)
I did mars as well:
news://news.povray.org/3EC752E4.FCFDBF5D%40gmx.de
http://news.povray.org/povray.binaries.images/31675/225014/#225014
This is without exaggeration of height (but again twice the resolution for
the topography).
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 17 Jun. 2003 _____./\/^>_*_<^\/\.______
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> Animation, Animation, Animation :)
>
My next plan. Probably in a month or so...
It'll render forever, though.
Wolfgang
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Florian Brucker wrote:
> Hey Wolfgang!
>
> Great Images! Are we going to see some of the other planets, too?
>
Probably not. At least not likely in the next 3 months.
>> But Mars has more extreme topography.
> Could you give us some figures, like deepest valley/highest peak?
>
The large volvano is Olympus Mons -- said to be the highest volcano in
the solar system: it is 24km high and measures 550km across.
The large canyon system is called Vallis Marineris: it extends
over 4000km and is up to 7km deep.
(Copy&paste from my homepage ;)
Wolfgang
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Christoph Hormann wrote:
> I did mars as well:
>
> news://news.povray.org/3EC752E4.FCFDBF5D%40gmx.de
> http://news.povray.org/povray.binaries.images/31675/225014/#225014
>
Nice images.
Seems you found a color map of Mars somewhere...
> This is without exaggeration of height (but again twice the resolution for
> the topography).
>
IIRC, the 1/128 degree data did not include the poles at that time,
to I decided to use the 1/64 degree data.
Wolfgang
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Wolfgang Wieser wrote:
>
> > news://news.povray.org/3EC752E4.FCFDBF5D%40gmx.de
> > http://news.povray.org/povray.binaries.images/31675/225014/#225014
> >
> Nice images.
> Seems you found a color map of Mars somewhere...
It is very low resolution and includes shading which is difficult to
remove. You can find this at various places, for example:
http://www.solarviews.com/cap/mars/marscyl1.htm
> IIRC, the 1/128 degree data did not include the poles at that time,
> to I decided to use the 1/64 degree data.
It only goes to 88 degrees but that's no reason not to use it (just fill
the rest with lower resolution).
There are some slight scanning structures in the data though (only visible
in extreme situations of course).
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 17 Jun. 2003 _____./\/^>_*_<^\/\.______
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I am waiting with bated breath :)
It would be nice too if say a third of the earth was in shadow so you see
the topology coming into view as it breaks through the terminator.
Dave
"Wolfgang Wieser" <wwi### [at] gmxde> wrote in message
news:3f20f340@news.povray.org...
> > Animation, Animation, Animation :)
> >
> My next plan. Probably in a month or so...
> It'll render forever, though.
>
> Wolfgang
>
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Christoph Hormann wrote:
> It is very low resolution and includes shading which is difficult to
> remove. You can find this at various places, for example:
>
> http://www.solarviews.com/cap/mars/marscyl1.htm
>
I never tried to use real color of Mars so far but thought I
could search for a color map today.
Unfortunately, the results were frustrating.
It seems, there used to be a nice texture map on the net because
I stepped over the following:
Quote from: http://www.cherba.com/wcs/tutorials/vns/mola/
>The nice folks at NASA have made it easy to texture Mars. You'll find
>the 7.4 Mb color.jpg in the same directory as the rest of the MOLA data.
Unfornunately, the link is dead and half an hour searching the net
did not reveal it...
Wolfgang
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"Wolfgang Wieser" <wwi### [at] gmxde> wrote in message
news:3f20353c@news.povray.org...
> Fernando Gonzalez del Cueto wrote:
>
> > Are the heights on a real scale? I saw Africa-Europe image and it seems
to
> > me that the elevations are exagerated, but perhaps I have a wrong
> > intuition.
> >
> As explained in the text above the images, the height (and the atmosphere)
> is scaled by a factor of 30.
Only 30? Looks something more like 10,000 to me. They say the earth, if
shrunken down, would be more smooth than any common man-made sphere.
>
> Otherwise Earth would be boringly flat ;)
I agree, and you do have artistic license for scaling, including your
extremely thick atmosphere.
>
> Wolfgang
>
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Machiavelli wrote:
> "Wolfgang Wieser" <wwi### [at] gmxde> wrote in message
> news:3f20353c@news.povray.org...
>> As explained in the text above the images, the height (and the
>> atmosphere) is scaled by a factor of 30.
>
> Only 30? Looks something more like 10,000 to me. They say the earth, if
> shrunken down, would be more smooth than any common man-made sphere.
>
Look: The atmosphere is 20km, scaled by factor 30 yields to 600km.
Earth has a radius of 6368km (don't mind the last digit) which is
about 1/10th of the atmosphere. Looking at the image that seems
plausible...
> I agree, and you do have artistic license for scaling, including your
> extremely thick atmosphere.
>
Ok, then I'll use my "license" :)
Wolfgang
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> Only 30? Looks something more like 10,000 to me.
10000?? A mountain, only 1.3 km high, scaled by this factor, would then
be higher than the earth's equatorial diameter!
> They say the earth, if
> shrunken down, would be more smooth than any common man-made sphere.
This shrunken earth would then be a very tiny sphere:
Diameter of earth = 12756 km
Height of Mt. Everest = 8.850 km
Depth of Marianas trench = 10.924 km
Thickness of the traces of a standard printed circuit board = 0.035 mm
These traces are man-made and are *easily* felt with the fingertips.
Shrinking the earth by approx. 1/253000000 gives
Diameter of earth = 5 cm (2")
Height of Mt. Everest = 0.035 mm
Depth of Marianas trench = 0.043 mm
Shrinking the earth by approx. 1/312000000 gives
Diameter of earth = 4.1 cm
Height of Mt. Everest = 0.028 mm
Depth of Marianas trench = 0.035 mm
Although neither Mt. Everest nor Marianas trench have vertical walls,
even a 5-cm-earth would have a feelable Mt. Everest and Mariana trench.
But 35 micrometers are far from the smoothest man-made sphere; the
most accurate sphere probably is this:
http://www.tip.csiro.au/IMP/Optical/spheres.htm
Enlarging this to earth-size, we get
Diameter = 9.4 cm -> 12756 km
Total error = 50 nm -> 6.79 m (not km!)
Roughness = 0.2 nm -> 37.6 cm
Or the other way:
Diameter of earth = 0.032 mm (!)
Height of Mt. Everest + Depth of Marianas trench = 50 nm
So "more smooth than any man-made sphere" is wrong by two to three
orders of magnitude (depending on the diameter, of course).
Sputnik
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High!
Wolfgang Wieser schrieb:
The large volvano is Olympus Mons -- said to be the highest volcano in
the solar system: it is 24km high and measures 550km across.
The large canyon system is called Vallis Marineris: it extends
over 4000km and is up to 7km deep.
No, the latter is not true - there are some areas in the large southern
impact basin Hellas Planitia which are even about 8,000
metres below average elevation!
See you in Khyberspace -
http://home.arcor.de/yadgar/khyberspace/index-e.html
Afghanistan Chronicle: http://home.arcor.de/yadgar/index-e.htm
Home-made electronic music:
http://home.arcor.de/yadgar/music/Transrapid.mp3
Yadgar
Now playing: Total Banane (Zoff)
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Jörg 'Yadgar' Bleimann wrote:
> Wolfgang Wieser schrieb:
> The large canyon system is called Vallis Marineris: it extends
> over 4000km and is up to 7km deep.
>
> No, the latter is not true - there are some areas in the large southern
> impact basin Hellas Planitia which are even about 8,000
> metres below average elevation!
>
If I understand you correctly, then you just explained that there
is a region on Mars called "Hellas Planitia" which is 8 km "deep" (?)
That's interesting... maybe you know the longnitude and latitude?
BTW, I don't see why my above statement is "not true".
A close-up rendering of Vallis Marineris is available here:
http://www.cip.physik.uni-muenchen.de/~wwieser/render/img/mars/
Wolfgang
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Wolfgang Wieser wrote:
> Unfornunately, the link is dead and half an hour searching the net
> did not reveal it...
2min searching the ftp server revealed:
ftp://ltpftp.gsfc.nasa.gov/projects/tharsis/MOLA/GRIDS
Matthias
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Matthias Wieser wrote:
> Wolfgang Wieser wrote:
>> Unfornunately, the link is dead and half an hour searching the net
>> did not reveal it...
>
> 2min searching the ftp server revealed:
> ftp://ltpftp.gsfc.nasa.gov/projects/tharsis/MOLA/GRIDS
>
Yeah... because that IS the dead link I mentioned.
Fortunately, it seems that the host was only temporarily down
because I was able to get that file today.
Thanks for pointing that out.
Wolfgang
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