Hi Patrick "Patrick Greenwood" writes
On Wed, 27 Apr 2005 17:08:16 +0200, Thomas F�rster wrote:
>
> Am Mittwoch 27 April 2005 16:42 schrieb Patrick Greenwood:
> >> ...
> > Yes -- I did specify the --runway and I recall <I'm not at my machine>
it
> > did put me on the runway, but no closer to one end or the other. So I
> > started changing the lon/lat specification and moving the plane around
> that
> > way. I gave up and went to bed. Then it dawned on me that the latitude
> > numbers get <smaller> as you approach the equator!
> >
> > In the default, the airplane at KSFO is situated right on the runway
> > threshold.
>
> Which is the normal behaviour for all airports. Can you confirm that this
> is a
> specific problem of KLME.
>
> > In looking at preferences.xml I can't understand how this was
> > accomplished. Is there any other configuration file applicable to the
> > default start-up or is everything in preferences.xml?
As far as I am aware unless you specify otherwise on the command line in linux the preferences.xml file is what you will get.
>
> I guess the starting locations are calculated from the data in apt.dat.gz.
> It
> contains the runway center point as well as heading and length. So it
> should
> be rather trivial to calculate a position near the threshold.
Thank you for the pointer. It sounds like the answer very well may lie on or in the vicinity of apt.dat.gz.
I haven't tried a lot of alternate airports but have been plopped right in the middle of KGCN and C74 as well, so that must be the starting point and then offsets somehow calculated from there--perhaps something like this? http://baron.flightgear.org/pipermail/flightgear-cvslogs/2004-December/009252.html
I have used quite a lot of other airports around the world,but not the ones you mention,
and I have never been placed anywhere except on the threshold of the runway I have
specified.I have on occasions been displaced off to the side of a runway but this has
almost always been because I have been using an incorrect scenery file for the version
of FG I am running.To know if this is a bug or not I guess you need someone else that uses
these airports to confirm the problem.Also you could check the lat/lon of the thresholds of the
runways at the airports concerned against the information for that airport in the apt.dat.gz
file.
Having a quick look at the preferences.xml file I note that near the top is areas to specify the
airport and the runway.
Could you also say what OS you are using.
HTH
Pat
Cheers Innis
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