Re: [Flightgear-devel] TaxiDraw and choice of images from terraserver-usa

2004-10-21 Thread Boris Koenig
Chris Metzler wrote:
[...] 
The Urban Areas/T=4 dataset is fabulous, btw -- it goes down to
25cm resolution (TaxiDraw fetches 1 meter resolution images, it appears).
I'd recommend just changing fetch.cpp to T=4, and getting the highest
resolution images available; but not all areas are covered by the
better dataset.  That's why I'm recommending tests -- try to fetch from
the higher resolution dataset, and drop down to the lower-res one if
the first fetch fails.
LOL, sounds as if Chris has hacked terraserver.com to provide him with
their payware imagery for free ;-)
After all your attempts, it's now certainly VERY interesting to have a 
look at their logs !

Did you also try numbers greater than 4 ? :-)
And I don't even mention what their logs are going to look like if
Chris adds your brute force method of trying to look for available
images :-)
What a creative way to organize a distributed denial of service attack
against a Microsoft server,  really Chris, awesome !! ;-)

Boris
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Re: [Flightgear-devel] TaxiDraw and choice of images from terraserver-usa

2004-10-21 Thread Chris Metzler
On Thu, 21 Oct 2004 10:24:45 +0200
Boris Koenig [EMAIL PROTECTED] wrote:

 Chris Metzler wrote:
  [...] 
  The Urban Areas/T=4 dataset is fabulous, btw -- it goes down to
  25cm resolution (TaxiDraw fetches 1 meter resolution images, it
  appears). I'd recommend just changing fetch.cpp to T=4, and getting
  the highest resolution images available; but not all areas are covered
  by the better dataset.  That's why I'm recommending tests -- try to
  fetch from the higher resolution dataset, and drop down to the
  lower-res one if the first fetch fails.
 
 LOL, sounds as if Chris has hacked terraserver.com to provide him with
 their payware imagery for free ;-)

Oh man, I don't know if I explained this well enough.

The stuff on terraserver-usa.com (as opposed to terraserver.com -- same
company, different website), including the images I fetched, are
all free through the web interface.  Try it out with the browser of your
choice; you'll see it all just by clicking on links.  Before,
terraserer-usa only had one dataset of free aerial images.  Now they
have a second, which improves coverage in U.S. urban areas.


 Did you also try numbers greater than 4 ? :-)
 
 And I don't even mention what their logs are going to look like if
 Chris adds your brute force method of trying to look for available
 images :-)

Heh.  But again, I wasn't fishing for available images by tweaking the
URL Dave uses in TaxiDraw.  These images are available normally,
through normal use.  There was no detective work on my part in finding
the images, because they provide them to you with nice informative links.
The only thing I did was figure out how to get fetch.cpp to draw from
the new dataset instead of the old one-- something that would have been
trivial for anyone who knows c++ (but I don't).

-c

-- 
Chris Metzler   [EMAIL PROTECTED]
(remove snip-me. to email)

As a child I understood how to give; I have forgotten this grace since I
have become civilized. - Chief Luther Standing Bear


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Re: [Flightgear-devel] TaxiDraw and choice of images from terraserver-usa

2004-10-21 Thread David Luff


On 10/21/04 at 9:26 AM Chris Metzler wrote:

On Thu, 21 Oct 2004 10:24:45 +0200
Boris Koenig [EMAIL PROTECTED] wrote:

 Chris Metzler wrote:
  [...]
  The Urban Areas/T=4 dataset is fabulous, btw -- it goes down to
  25cm resolution (TaxiDraw fetches 1 meter resolution images, it
  appears). I'd recommend just changing fetch.cpp to T=4, and
getting
  the highest resolution images available; but not all areas are covered
  by the better dataset.  That's why I'm recommending tests -- try to
  fetch from the higher resolution dataset, and drop down to the
  lower-res one if the first fetch fails.

 LOL, sounds as if Chris has hacked terraserver.com to provide him with
 their payware imagery for free ;-)

Oh man, I don't know if I explained this well enough.

The stuff on terraserver-usa.com (as opposed to terraserver.com -- same
company, different website), including the images I fetched, are
all free through the web interface.  Try it out with the browser of your
choice; you'll see it all just by clicking on links.  Before,
terraserer-usa only had one dataset of free aerial images.  Now they
have a second, which improves coverage in U.S. urban areas.


Yes, to clarify, terraserver-usa.com IS NOT THE SAME SITE as
terraserver.com.

terraserver-usa.com includes the following copyright statement:

The U.S. Geological Survey (USGS) provides the Microsoft® TerraServer
site with images and maps of the United States. The images are in the
public domain, and are freely available for you to download, use and
re-distribute. If you download and use any images, the TerraServer team and
the USGS appreciate a reference to our work on this project.

The TaxiDraw website includes a thank-you to both USGS and Microsoft
Research, so we're following both the letter and the spirit of the law
here.  Terraserver-usa.com even includes a reference to a programming api
to interface to the site (but it's dot-net so I didn't use it), and at
least one other site has had an alternative front end to their images up
for several years now with no apparent problems.  TaxiDraw has absolutely
nothing whatsoever to do with terraserver.com, only terraserver-usa.com.
This is directed at others, not Chris, who obviously knows the score.

As Chris says, terraserver-usa.com now includes free colour USGS images to
many (I haven't checked this, just going on Chris' post) urban areas, which
include many airports.  These are presumably easier to work against and
more up-to-date than the b/w images.  When I coded TaxiDraw they only had
Seattle in colour, so I didn't bother adding support.  I will eventually
add support for these, but my current priority for the image code is to use
the cross-platform cURL library and work with the images in pieces as
downloaded (instead of tiling them with ImageMagick) so that Windows users
can also benefit from this.  Working with tiles should improve program
response when zoomed in on a small portion of the image as well.

I won't be including any support whatsoever for downloading images that
don't have an unequivocal copyright statement allowing unrestricted use of
the images similar to the above, have no fear of that.  I probably will put
some safeguards in the program to avoid downloading excessively large
areas, but for now I trust that users will use it responsibly!

Cheers - Dave



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Re: [Flightgear-devel] TaxiDraw and choice of images from terraserver-usa

2004-10-21 Thread David Luff


On 10/21/04 at 3:16 PM David Luff wrote:

On 10/21/04 at 9:26 AM Chris Metzler wrote:

  something about changing to colour images 

I will eventually
add support for these, but my current priority for the image code is to
use
the cross-platform cURL library and work with the images in pieces as
downloaded (instead of tiling them with ImageMagick) so that Windows users
can also benefit from this.  Working with tiles should improve program
response when zoomed in on a small portion of the image as well.


Having read what you changed to get these in more detail (T1 - T4), it
seems it shouldn't be too difficult at all to check for a valid jpeg
returned with T4, and then default to T1 if not.  I'll try and knock
something up.

Cheers - Dave



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Re: [Flightgear-devel] TaxiDraw and choice of images from terraserver-usa

2004-10-21 Thread Ampere K. Hardraade
Wouldn't it be better if FAA Airport Diagrams are used instead of aero photos?  
There can always be an option to translate the airport to the proper location 
afterwards.

Ampere

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