Re: [Flightgear-devel] Aerial images

2004-10-23 Thread Erik Hofman
Paul Surgeon wrote:
When I fired up FlightGear a week ago I noticed that the textures looked very 
dry and brown to me. I thought San Francisco would be a lot greener and 
reckoned it was just the guys who created the textures.
Neh, I'm not brown.
Tonight I was thinking of making some greener looking grass textures for the  
airports however when I did some searching around USA on Terraserver looking 
at colour photos (not BW) I saw that USA looks dry everywhere including 
places like Georgia, Washington DC and Chicago. I've yet to find a nice green 
photo.
Do the aerial photo, surveyor guys pick the dry seasons to do all their work 
in or is USA really as dry as it appears on Terraserver?
It's actually quite understandable. Grass is green in spring. In the 
other seasons grass is mostly brown or yellow. Only in places like The 
UK and The Netherlands where there can be quite some rain even during 
the summer grass _might_ stay green a little longer.

Erik
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Re: [Flightgear-devel] Aerial images

2004-10-23 Thread Boris Koenig
Paul Surgeon wrote:
When I fired up FlightGear a week ago I noticed that the textures looked very 
dry and brown to me. I thought San Francisco would be a lot greener and 
reckoned it was just the guys who created the textures.

Tonight I was thinking of making some greener looking grass textures for the  
airports however when I did some searching around USA on Terraserver looking 
at colour photos (not BW) I saw that USA looks dry everywhere including 
places like Georgia, Washington DC and Chicago. I've yet to find a nice green 
photo.
Do the aerial photo, surveyor guys pick the dry seasons to do all their work 
in or is USA really as dry as it appears on Terraserver?

Seems a little odd to me and I'm curious.  :)
Is it that important at all ?
I mean, it's like Erik said: usually the green areas aren't even
green most of the time ... so, essentially green imagery wouldn't
be suitable for other seasons anymore ...
Unless of course one intends to apply some basic color-based
filtering:
Of course, having colorful imagery in the first place would
theoretically enable you to try to approximate the color-changes
per season based on the simulator settings, and possibly also
country-/region specific profiles - maybe even based on contributing
factors such as the relative position of rivers/lakes in the
proximity ;-)
One would then need to tell FlightGear in what season an image
has been created, so that it can generalize spring, summer, fall
and winter settings by deriving corresponding changes in color strength,
and -density ...
sounds a bit like rocket-science, doesn't it ? ;-)
--
Boris

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Re: [Flightgear-devel] Aerial images

2004-10-23 Thread Paul Kahler
Actually, my grass is green all summer, and so are most of my
neighbors and most businesses. I'm in Michigan and we have no
shortage of water so people like to keep things green. I
sometimes tell my wife not to water so much and that it's OK
to let it brown a little, but it's still green. Look at the
blue marble images from NASA and you'll see that the midwest
is much greener than other parts of the US. There are really
maybe 2 months when the wild grassy areas really turn brown
at all around here.
-Paul
Erik Hofman wrote:
It's actually quite understandable. Grass is green in spring. In the 
other seasons grass is mostly brown or yellow. Only in places like The 
UK and The Netherlands where there can be quite some rain even during 
the summer grass _might_ stay green a little longer.

Erik

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Re: [Flightgear-devel] Aerial images

2004-10-23 Thread Ampere K. Hardraade
In the wild, nobody keeps the grass, so you will see more brown rather than 
green.

Ampere

On October 23, 2004 01:04 pm, Paul Kahler wrote:
 Actually, my grass is green all summer, and so are most of my
 neighbors and most businesses. I'm in Michigan and we have no
 shortage of water so people like to keep things green. I
 sometimes tell my wife not to water so much and that it's OK
 to let it brown a little, but it's still green. Look at the
 blue marble images from NASA and you'll see that the midwest
 is much greener than other parts of the US. There are really
 maybe 2 months when the wild grassy areas really turn brown
 at all around here.

 -Paul

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[Flightgear-devel] Aerial images

2004-10-22 Thread Paul Surgeon
When I fired up FlightGear a week ago I noticed that the textures looked very 
dry and brown to me. I thought San Francisco would be a lot greener and 
reckoned it was just the guys who created the textures.

Tonight I was thinking of making some greener looking grass textures for the  
airports however when I did some searching around USA on Terraserver looking 
at colour photos (not BW) I saw that USA looks dry everywhere including 
places like Georgia, Washington DC and Chicago. I've yet to find a nice green 
photo.
Do the aerial photo, surveyor guys pick the dry seasons to do all their work 
in or is USA really as dry as it appears on Terraserver?

Seems a little odd to me and I'm curious.  :)

Thanks
Paul

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