Re: [Flightgear-devel] Airway routing heads up

2006-02-09 Thread Arnt Karlsen
On Thu, 09 Feb 2006 17:28:24 +1300, dene wrote in message 
[EMAIL PROTECTED]:

 Hi Arnt, well you lost me just after chk your light 'n color
 settings, I  click on the link and it opens it up in another browser
 window (Using win32  Firefox v1.0.7).
 
 As for  I hook links2 to my mail client and found it waaay too dark
 that  one passed over at about 5,000ft agl.  :-)

.. :o)  I sometimes forget about people stuck in quagmires like
Wintendo, links2 is quickest one of 25 or so web browser, I just
middleclick url's in my mail client and view them in links2.  ;o)

..color settings vary a _lot_ between boxes because we humans are
different and tend to use different methods to adjust things to our
liking, introducing waaay dark FG screenshots in my case.  :o)


 My original post was meant as a light-hearted joke.. no reflection on
 Durk's  work that I have the utmost admiration for, both in scope and
 productivity 
 . I was thinking about it this morning and thought... well red is
 going to  look like the earth's bleeding, blue is going to get lost in
 the background,  green...well people might be eating while they're
 reading this so i'll  refrain from saying what that'd look like...came
 to the conclusion that  magenta might be the only color that won't get
 confused !! :-
 
 Cheers
 =Dene
 
  From: Arnt Karlsen [EMAIL PROTECTED]
  Reply-To: flightgear-devel@lists.sourceforge.net
  To: flightgear-devel@lists.sourceforge.net
  Subject: Re: [Flightgear-devel] Airway routing heads up
  Date: Wed, 8 Feb 2006 22:27:40 +0100
 
  On Wed, 08 Feb 2006 16:48:38 +1300, dene wrote in message
  [EMAIL PROTECTED]:
 
   Hi Durk, I don't mean to be rude, and I hope you won't take this
   the wrong  way, but the graphic looks like someone has thrown an
   egg at the earth
 
  ..before drawing too many conclusions, chk your light 'n color
  settings, in my case I hook links2 to my mail client and found it
  waaay too dark.
 


-- 
..med vennlig hilsen = with Kind Regards from Arnt... ;o)
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.



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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread Durk Talsma
On Tuesday 07 February 2006 23:33, Christian Mayer wrote:
 Durk Talsma schrieb:
  Notice that the routing algorithm is still far from perfect, but I
  thought it would be fun to share some of the initial experiments with you
  guys...

 What algorthim are you using?

 CU,
 Christian

The routing algorithm is based on the ground network tracing algorithm. See 
src/Airports/groundnet.cxx; the findShortestRoute() and trace() functions.

The ground path here is stored as a series of nodes, and segments connecting 
each node.

The trace() function is a recursive depth-first binary three search algorithm, 
that scans all the outbound connections from each node. The search is in 
principle exhaustive, but the following criteria stop the algorithm from 
descending further in into the tree:

1) Current node has already been visited (i.e. we're running round in 
circles). 

2) the current node is the required end point.
3) the total length of the search path is longer than that of an already found 
route. 

The airnet routing algorithm is based on this, but many airroutes don't have 
direct airway to airway connections between them, so I've adapted the code 
split up the total route into sections and then I try to fit an airway route 
through each section. The last bit clearly still needs some cleaning up.

Cheers,
Durk


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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread Durk Talsma
On Wednesday 08 February 2006 02:59, David Megginson wrote:
 FYI, most countries publish preferred routes for high- and low-level
 flights between major centres.  The Canadian publications include the
 North Atlantic routes as well.

 For example, here are the first few preferred low-level routes *from*
 Ottawa, Canada to various centres:

 Ottawa to:
   Aylmer  (2900) YOW V300 YSO V37 YYZ V443 YQO
   Boston  V104 MSS V141 CON CON154 KHRIS LWM
   Cleveland  V300 YSO V37 YYZ V265 THORL ERI CXR
   Detroit City  V300 YSO V37 YYZ V443 YQO HADAR ARRIVAL
   Detroit Metro-Wayne V300 YSO V37 YYZ V443 YQO SPICA ARRIVAL
   Detroit Willow Run  V300 YSO V37 YYZ V443 YQO HADAR ARRIVAL
   Erie  (2900) YOW V300 YSO V37 ERI
   Hamilton  V300 YSO V37 ANCOL (2800)
   London  V300 YSO V308
   Mirabel V360 YMX MIRABEL ARRIVAL


That's interesting information. I can imaging that Canada publishes the North 
Atlantic routes as well, considering the amount of international traffic 
passing through Canadian airspace. 

Do you know if I can download this information somewhere?

Cheers,
Durk


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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread Wendell Turner
On Wed, Feb 08, 2006 at 07:08:59PM +0100, Durk Talsma wrote:
 On Wednesday 08 February 2006 02:59, David Megginson wrote:
  FYI, most countries publish preferred routes for high- and low-level
  flights between major centres.  The Canadian publications include the
  North Atlantic routes as well.
 
 Do you know if I can download this information somewhere?

For the US, it is available here:

  
http://www.fly.faa.gov/Products/Coded_Departure_Routes/NFDC_Preferred_Routes_Database/nfdc_preferred_routes_database.html

Wendell



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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread David Megginson
On 08/02/06, Wendell Turner [EMAIL PROTECTED] wrote:

  Do you know if I can download this information somewhere?

 For the US, it is available here:

   
 http://www.fly.faa.gov/Products/Coded_Departure_Routes/NFDC_Preferred_Routes_Database/nfdc_preferred_routes_database.html

Most other countries, unfortunately, do not make it available free.


All the best,


David

--
http://www.megginson.com/


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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread Arnt Karlsen
On Wed, 08 Feb 2006 16:48:38 +1300, dene wrote in message 
[EMAIL PROTECTED]:

 Hi Durk, I don't mean to be rude, and I hope you won't take this the
 wrong  way, but the graphic looks like someone has thrown an egg at
 the earth 

..before drawing too many conclusions, chk your light 'n color settings,
in my case I hook links2 to my mail client and found it waaay too dark.

-- 
..med vennlig hilsen = with Kind Regards from Arnt... ;o)
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.




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Re: [Flightgear-devel] Airway routing heads up

2006-02-08 Thread dene maxwell

Hi
I think this link will provide a good start for the information you want as 
it relates to New Zealand and the South Pacific. It has various links to 
more detailed information


http://www.aip.net.nz/pdf/ENR_3.1.pdf

=Dene



From: David Megginson [EMAIL PROTECTED]
Reply-To: flightgear-devel@lists.sourceforge.net
To: flightgear-devel@lists.sourceforge.net,Wendell Turner 
[EMAIL PROTECTED]

Subject: Re: [Flightgear-devel] Airway routing heads up
Date: Wed, 8 Feb 2006 16:11:27 -0500

On 08/02/06, Wendell Turner [EMAIL PROTECTED] wrote:

  Do you know if I can download this information somewhere?

 For the US, it is available here:

   
http://www.fly.faa.gov/Products/Coded_Departure_Routes/NFDC_Preferred_Routes_Database/nfdc_preferred_routes_database.html


Most other countries, unfortunately, do not make it available free.


All the best,


David

--
http://www.megginson.com/


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Re: [Flightgear-devel] Airway routing heads up

2006-02-07 Thread Christian Mayer
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Durk Talsma schrieb:
 Notice that the routing algorithm is still far from perfect, but I thought it 
 would be fun to share some of the initial experiments with you guys...

What algorthim are you using?

CU,
Christian


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RE: [Flightgear-devel] Airway routing heads up

2006-02-07 Thread dene maxwell
Hi Durk, I don't mean to be rude, and I hope you won't take this the wrong 
way, but the graphic looks like someone has thrown an egg at the earth 
:-


I looking forward to the final results of your work as I'm sure they'll add 
a new reality to FlightGear.  I'm in awe at how some of you guys can write 
visually pleasing software so fast.


Cheers
Dene


From: Durk Talsma [EMAIL PROTECTED]
Reply-To: flightgear-devel@lists.sourceforge.net
To: flightgear-devel@lists.sourceforge.net
Subject: [Flightgear-devel] Airway routing heads up
Date: Tue, 7 Feb 2006 22:22:42 +0100

Hi Guys,

I just finished adding a few more hacks to my good old global
airport/navaid/timezone test program, so that I can now plot the results 
from

FlightGear's airway route tracing algorithm:

http://durktalsma.xs4all.nl/FlightGear/web/35.html

Notice that the routing algorithm is still far from perfect, but I thought 
it

would be fun to share some of the initial experiments with you guys...

Cheers,
Durk


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