HB-GRAL wrote:
I checked some airports the last days. You can not say that FlightGear
or X-Plane data is accurate and the rest of the mapping world is missing
the points.
Sure, DAFIF (which is the source to most of 'our' runways) is neither
error-free nor complete. That's why corrections
Am 15.09.11 18:12, schrieb Martin Spott:
HB-GRAL wrote:
I see now also some differences between OSM and our apt.dat [...]
Note that OSM might be aiming at a different target, they're not
necessarily building a database which meets the specific requirements
in (simulated) aviation.
Cheers,
On Thursday 15 September 2011 22:08, HB-GRAL wrote:
No, it looks like the mapping with apt.dat data is inaccurate, at least
outside the United States.
I checked some airports the last days. You can not say that FlightGear
or X-Plane data is accurate and the rest of the mapping world is
On 09/15/2011 05:15 PM, Martin Fenelon wrote:
I like to think that the positional errors of many (most non US?)
aerodromes are due to mistakes made when changing from one datum to
another.
Well, that's not what I think, based on looking at
the data.
The very first non-US example I looked
Right -- outside the USA, much of the x-plane airport data is hand entered
and submitted by end-users with no quality control other than people are
welcome to research and fix problems they find as they find them. I
wouldn't be surprised if some of the entries are complete guesses or crazy
typos.
Am 12.09.11 09:56, schrieb Alan Teeder:
Google maps are notoriously incorrect on co-ordinates. Even their own road
map overlay does not align perfectly with the scenery. You can check the
accuracy yourself if you have a GPS receiver and visit a set of easily
identifiable points like road
Am 11.09.11 03:20, schrieb Curtis Olson:
Asking a cartographer where is it? is just about as difficult a question
as asking an astronomer what time is it?
Curt.
Hi Curt
These are very good questions. I will ask some cartographers and
astronomers.
Cheers, Yves
Am 12.09.11 00:39, schrieb Martin Spott:
HB-GRAL wrote:
Exactly, that's a default in Robin's collection.
Hi Martin
Yes, sorry, you answered me this one some months before and I just
forgot about. It is part of the collection and this probably makes sense.
Cheers, Yves
To: flightgear-devel@lists.sourceforge.net
Subject: Re: [Flightgear-devel] Openstreetmap vs. G**gl
HB-GRAL wrote:
I am just curious why FlightGear and OSM have the same accurate
position, and Google map shows another one.
I might not have entirely understood your question (it's late and I'm
Hi all
Unfortunately I just run into another problem with my map.
This is what I see on my currently generated map using 8.10 taxiway data
and 8.50 runway data (this is no reference and a crude mixup of course,
I apologize in adnvance):
http://maptest.fgx.ch/screens/mapping.png
But now, I
I don't know the specific answer in this case, but it does illustrate one of
the surpreme challenges in mixing different gis databases ... you end up
with information from different sources, adhering to different standards,
appropriate for different scales, using different datums, different
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