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> I would have expected the land to be on the coast almost the same value
> as the sea, but there is a definite sharp change from light gray(sea) to
> dark gray(land), and that can be seen on all coasts...
Nevermind... I fixed it... after rereading again and again the
documentation, I found out that the sea area, has the value -9999 (no
data has been registered for the area)... since the lowest plance on
earth is at -400 meters I think. This give a value of -30, so I just
changed all -9999 to 0 and BINGO! I get a perfect heightfield of europe!
Though my program can only output a 8bit bmp... I'll work out a way to
write a Grayscale PNG of 16bit!
See ya!
Xilo
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Xilo Musimene wrote:
>
> > I would have expected the land to be on the coast almost the same value
> > as the sea, but there is a definite sharp change from light gray(sea) to
> > dark gray(land), and that can be seen on all coasts...
>
> Nevermind... I fixed it... after rereading again and again the
> documentation, I found out that the sea area, has the value -9999 (no
> data has been registered for the area)... since the lowest plance on
> earth is at -400 meters I think. This give a value of -30, so I just
> changed all -9999 to 0 and BINGO! I get a perfect heightfield of europe!
>
> Though my program can only output a 8bit bmp... I'll work out a way to
> write a Grayscale PNG of 16bit!
>
> See ya!
> Xilo
Great, that's what I had to figure out too. It's obvious once you know
it... :)
And yes, a great part of the Netherlands is below sea level. I'm sitting
in such a pit now.
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> Great, that's what I had to figure out too. It's obvious once you know
> it... :)
Yes, indeed... and it's pretty interesting to have on the same data the
difference between sea and land, so I can use it for a mask or
something like that...
> And yes, a great part of the Netherlands is below sea level. I'm sitting
> in such a pit now.
Hehe, I did know such thing, but I had to see it on a heightfield of the
planet to believe it! ;)
See ya,
Xilo
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