See the following:

http://www.wikipov.org/ow.asp?EarthModel


Neil

"cedriccrucke" <ced### [at] hotmailcom> wrote in message 
news:web.41fa53c2bf3d391c20b6508a0@news.povray.org...
> Hi!
>
> this is ages after you posted this, but i was wondering if i could use 
> your
> picture of the earth and use it for my own personal use?
>
> Thanks a lot!!!
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> Christoph Hormann <chr### [at] gmxde> wrote:
>> At the first glance this probably looks like yet another boring earth
>> image but it is somewhat different.
>>
>> I used the 1km resolution data sets for geometry and coloring available
>> on:
>>
>> http://earthobservatory.nasa.gov/Newsroom/BlueMarble/
>>
>> and used real surface geometry instead of bump mapping.  Of course the
>> detail is hardly visible at this size, the second image shows a sample
>> from the original render at 6400x4800 pixel size.
>>
>> It was of course not possible to render the whole planet in one piece, 
>> the
>> height data alone is about 2GB.  Therefore i split it into 45x45 degree
>> tiles and rendered them one after the other (with some overlap).
>>
>> Files with cloud coverage data are available at the mentioned site too 
>> but
>> with strongly varying quality.  A short distance view with clouds of 
>> parts
>> of europe (with 2.5x exaggerated height) can be seen on:
>>
>> http://www.schunter.etc.tu-bs.de/~chris/files/earth_a2.jpg
>>
>> the same without clouds on:
>>
>> http://www.schunter.etc.tu-bs.de/~chris/files/earth_a1.jpg
>>
>> I searched a lot for cloud height data which would be important for
>> realistic clouds but i could not find anything useful.
>>
>> I also made a view with natural height scale of western himalayas and
>> karakorum:
>>
>> http://www.schunter.etc.tu-bs.de/~chris/files/earth_a3l.jpg
>>
>> this shows the available detail level in the data and also the varying
>> quality in some parts (note the broad band of lower quality on the 
>> right).
>>
>> Christoph
>>
>> --
>> POV-Ray tutorials, include files, Sim-POV,
>> HCR-Edit and more: http://www.tu-bs.de/~y0013390/
>> Last updated 28 Feb. 2003 _____.//^>_*_<^/.______
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