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High!
Am 03.03.2011 05:55, schrieb Leroy Whetstone:
> I did a quick read. You're like me, starting out with Commodore64.
> It brought back memories staying up all night programing the dang thing.
> Actually I started out with the Vic20 in 1983.
Did you use a floppy drive (4040, 1541) or a tape recorder ("datasette")?
> And I did do machine
> lanuage for the commodore.
Cool! I just recently bought myself a vintage C 64 machine language
course book to learn Assembler... to finally really make use of my
Commodore 64 which I bought in 2005!
> But instead of Afghanistan I when to Mars.
Does that mean that you model and render Martian landscapes, according
to original NASA elevation data, with PoV-Ray?
See you in Khyberspace!
Yadgar
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> High!
>
> Did you use a floppy drive (4040, 1541) or a tape recorder ("datasette")?
I had the tape recorder for a while then the 1541 floppy. Believe or not
I still have some tapes with programs on them. The floppies I don't know.
>
>> And I did do machine
>> lanuage for the commodore.
>
>
> Cool! I just recently bought myself a vintage C 64 machine language
> course book to learn Assembler... to finally really make use of my
> Commodore 64 which I bought in 2005!
>
I never got rid of my Commodore 64 or some of the programs. I even
bought (at auction) another Commodore 64 for five bucks. I still have my
the machine language book.
>> But instead of Afghanistan I when to Mars.
>
>
> Does that mean that you model and render Martian landscapes, according
> to original NASA elevation data, with PoV-Ray?
>
Yes! Yes I did. But someone else did the hard work of working with the
'original NASA elevation data' and made a very large image map. The only
trouble is that you don't get much fine detail. Its like looking at Mars
from 50 miles up.
I have several POV files that show the whole planet, does close-up
views, and does landscapes. I can cut the planet up, that is show only
parts above or below a height. All using longitude and latitude of Mars.
I when so far as to take longitude and latitude of places around home on
earth and see what was there on Mars. My home is in the middle of nothing!
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> I when so far as to take longitude and latitude of places around home on
> earth and see what was there on Mars. My home is in the middle of nothing!
>
But as Mars is about half Earth's size, you are twice as close to all
other places... mostly other places also in the middle of nothing. :p
Alain
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Leroy Whetstone wrote:
> Yes! Yes I did. But someone else did the hard work of working with the
> 'original NASA elevation data' and made a very large image map. The only
> trouble is that you don't get much fine detail.
Was this from the 1992 Mars Digital Terrain Model? With Mars Express
and Mars Reconnaisance Orbiter there are now better data available, no
global coverage though.
Dang ... there went my evening ;) There are lots of strips for HRSC of
Mars Express and a few local mosaics. Best resolution up to 50m/pixel.
Didn't yet find any dtm level data products for MRO. I spent most of
the time converting a vicar file to png - ImageMagick can do it but
returned an 8 bit png with alternating Hi/Lo bytes. It also interlaced
the left and right half of the image in odd/even lines.
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High!
Am 05.03.2011 05:49, schrieb Leroy Whetstone:
> I had the tape recorder for a while then the 1541 floppy. Believe or not
> I still have some tapes with programs on them. The floppies I don't know.
With my first Commodore 64 back in 1984, I started with a 1541 (never
had a datasette)... but it took three months because of high demand
until the floppy drive could be delivered!
> I never got rid of my Commodore 64 or some of the programs. I even
> bought (at auction) another Commodore 64 for five bucks. I still have my
> the machine language book.
I gave my original Commodore 64 away in 1990 because I needed a "real"
computer (i. e. an Atari 1040 STFM) for doing papers at university...
but every few years I once more caught the C 64 bug, so I had to re-buy
some used "breadbins"... my current one I bought together with a 1541
for ten euros, but I had to take a 50-mile bicycle ride to get the hardware!
> Yes! Yes I did. But someone else did the hard work of working with the
> 'original NASA elevation data' and made a very large image map.
At 8-bit grayscale or at 16-bit vertical resolution? I recently wrote a
PoV-Ray script that generates 16-bit heightfields (and, after this, also
curved mesh2s) from SRTM Earth altimetry data processed with 3DEM (a
geographical visualization software)... if I remember correctly, 3DEM is
also able to process ASCII terrain matrizes from MOLA Mars (Mars Global
Surveyor) topography data!
And since a few years, there are also topographical contour maps of Mars
at 1:250,000 available...
> I have several POV files that show the whole planet, does close-up
> views, and does landscapes. I can cut the planet up, that is show only
> parts above or below a height. All using longitude and latitude of Mars.
> I when so far as to take longitude and latitude of places around home on
> earth and see what was there on Mars. My home is in the middle of nothing!
Won't you like to post some of these images on p.b.i.?
See you in Khyberspace!
Yadgar
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Christian Froeschlin wrote:
> Was this from the 1992 Mars Digital Terrain Model? With Mars Express
> and Mars Reconnaisance Orbiter there are now better data available, no
> global coverage though.
>
This is from the Read me file of the zip the one of the image files I have:
m46 - Global Mars planet imagery (c)2004
February 05, 2004 preliminary release
This map come from www.space-graphics.com
Please note that this is a preliminary version a may contain
bugs of any kind.
Usage License
This image is distributed as FREEWARE for Personal use only
NO Commercial use or Commercial redistribution allowed in any form
For more information:
site url: http://www.space-graphics.com
e-mail: inf### [at] space-graphics com
I have 3 maps from there. The web site is gone or taken over.
A couple of more I don't know where they came from.
> Dang ... there went my evening ;) There are lots of strips for HRSC of
> Mars Express and a few local mosaics. Best resolution up to 50m/pixel.
> Didn't yet find any dtm level data products for MRO. I spent most of
> the time converting a vicar file to png - ImageMagick can do it but
> returned an 8 bit png with alternating Hi/Lo bytes. It also interlaced
> the left and right half of the image in odd/even lines.
Think I used I veiw32 to flip some of the maps so they would render on
POV correctly.
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> High!
> At 8-bit grayscale or at 16-bit vertical resolution?
it was 8-bit gray scale.
>I recently wrote a
> PoV-Ray script that generates 16-bit heightfields (and, after this, also
> curved mesh2s) from SRTM Earth altimetry data processed with 3DEM (a
> geographical visualization software)... if I remember correctly, 3DEM is
> also able to process ASCII terrain matrizes from MOLA Mars (Mars Global
> Surveyor) topography data!
I have use the DEM for earth. Its been awhile.
There was a conversion program that make an image map from Dem data. I
had to tweak it to make it work.
>
> And since a few years, there are also topographical contour maps of Mars
> at 1:250,000 available...
>
Looks like I have my next project!
> Won't you like to post some of these images on p.b.i.?
>
I think I will. What would you like Area views, cut views, landscape views?
Have Fun!
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High!
Am 06.03.2011 19:10, schrieb Leroy Whetstone:
> I think I will. What would you like Area views, cut views, landscape views?
Hmmm... what about early morning in Noctis Labyrinthus, with the sun
rising above foggy chasms?
Or the southern escarpment of the base of Olympus Mons?
Or Charitum Montes, on the southern edge of Argyre Planitia?
See you in Khyberspace!
Yadgar
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I found the place to load the maps:
http://planetpixelemporium.com/mars.html
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I put a few images in the BPs Images. I had them scattered all over my
hard drive. While I was going through the old Mars POVs I found better
ways of doing things. They where wrote in 2005?!
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