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[navdata] best navdata for kaitak

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[navdata] best navdata for kaitak

Postby www2 » Sat Mar 26, 2022 6:04 am

He all any one have access to update nav.dat?
I have crate better navdata for Kai Tak Airport and set the IGS and Glide slope to the correct location.
And update the heading for the IGS change of the magnetic variation relative of 1995-1998.

The new data is:
Code: Select all
4  22.33241111  114.18501389    104 11190  18      89.000 KL   VHXX 13  IGS
6  22.33521300  114.18409000    300 11190  10  310089.000 KL   VHXX 13  GS
12  22.33241111  114.18501389    104 11190  18       0.000 KL   VHXX 13  DME-ILS

7  22.32833000  114.10576300     15     0   0      89.000 ---- VHXX 13  OM
8  22.33142200  114.16998600     15     0   0      89.000 ---- VHXX 13  MM
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Re: [navdata] best navdata for kaitak

Postby wkitty42 » Sat Mar 26, 2022 11:47 am

the complete record for the airport is needed with your changes... the reason is because FG needs to load the definition of an airport all in one go... so when FG finds your complete definition of VHXX, it'll load that first and ignore any others...

you can put the complete definition with your changes in a file (eg: VHXX.dat) which you then place in a custom scenery directory named NavData... NavData contains three directories... they are named "apt", "fix", and "nav"... your data file would go in the "nav" directory... so in the end you might have the file in "/home/your_user/MyFlightGear/MySceneryOverrides/NavData/nav/VHXX.dat"...

then you add "MySceneryOverrides" to FG as an additional scenery directory... this is easily done in the launcher's Addons tab... if everything is right, the next time you start FG, it should rebuild the databases... if that completes with no errors, then you should be able to fly and check out your changes in-sim... any changes you make to your VHXX.dat file should be seen the first time you start FG after making them... any new files for other airports should also trigger FG to rebuild its airport database... some custom scenery comes with a NavData directory these days ;)
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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Re: [navdata] best navdata for kaitak

Postby www2 » Mon Mar 28, 2022 12:49 am

@wkitty42
Thanks where can i find any more i on this progress on the wiki?

But i like to see that this will be include in the main nav.dat file.
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Re: [navdata] best navdata for kaitak

Postby wkitty42 » Mon Mar 28, 2022 12:34 pm

www2 wrote in Mon Mar 28, 2022 12:49 am:@wkitty42
Thanks where can i find any more i on this progress on the wiki?

i searched the wiki for "NavData" and found the following:
https://wiki.flightgear.org/FlightGear_Newsletter_October_2016#Local_apt.dat_versions_support
https://wiki.flightgear.org/Changelog_2017.2#Scenery

www2 wrote in Mon Mar 28, 2022 12:49 am:But i like to see that this will be include in the main nav.dat file.

i can understand that but i doubt it will happen... i suspect mainly for realism and that guess mainly stemming from knowing the team are working hard to allow easier, better, faster terrain changes using current data instead of 15+(?) year old data... "terrain changes" including the addition or removal of airports... custom scenery is the best method for this... especially since it also works with NavData trees and each custom scenery can have its own NavData tree...

Note: by "custom scenery" i do not mean you have to supply the graphics... supplying the NavData tree in a form easy to install* will be enough... especially if it works properly with existing custom scenery...






*: install == copy into the proper place
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
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wkitty42
 
Posts: 9146
Joined: Fri Feb 20, 2015 4:46 pm
Location: central NC, USA
Callsign: wk42
Version: git next
OS: Kubuntu 20.04


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