new designed KNID airport lower than the current one

alexis bory <[email protected]> Thu, 01 Feb 2007 01:35:26 +0100
Newsgroups gmane.games.flightgear.terragear.devel
Message-ID <[email protected]>
Hi,

I designed new buildings for KNID, then I wanted to have the correct 
taxiways and I used taxidraw.
Before submitting this work I decided to try the new apt in the scenery, 
so I used Terragear with DEM-30 and v0noa.

The result is average +/- 6m lower than the elevation written in the 
airport diagram and also than the previous fgfs airport.

Was DEM-30 the good source for elevations ?

Is there a known problem with airport elevations ?

Now the VOR and TACAN stations are also a few meters above the ground.
Well, the whole airfield is rendered on a slight slope (that's nice and 
rather realistic) but the main airfield elevation, 2283 ft at RW3 
beginning, is far away from the center.
I suppose the navaids model are positioned at this elevation (which is 
the same in apt.dat.gz and the Airport Diagram).

Thanks for your comments,

Alexis

--

Here the elevation I mesured from the new fgfs KNID compared with those 
from the Airport Diagram
http://flightaware.com/resources/airport/NID/APD/AIRPORT+DIAGRAM/pdf

RW    fgfs ft  AD ft     diff ft  diff m
21    2202     2200      2        0,61
3     2255     2283     -28      -8,53
32    2209     2240     -31      -9,45
14    2176     2202     -26      -7,92
26    2196     2225     -29      -8,84
8     2236     2260     -24      -7,32








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