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Disable Naviagtion database?

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Disable Naviagtion database?

Postby www2 » Sat Apr 27, 2019 6:08 pm

Is there a way to disable NavDatabase for using a external application that manage ADF/NAV radios?
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Re: Disable Naviagtion database?

Postby wkitty42 » Sat Apr 27, 2019 6:10 pm

not that i know of... maybe you can ask on the developer's mailing list? see the link to the mailing lists at the very top of the page above the graphic if you are not already on the list...
"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: Disable Naviagtion database?

Postby www2 » Sat Apr 27, 2019 6:28 pm

wkitty42
All ready done.
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Re: Disable Naviagtion database?

Postby wkitty42 » Sun Apr 28, 2019 5:09 pm

i saw your post just a few minutes ago... let's see what happens ;)
"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: Disable Naviagtion database?

Postby Hooray » Sat May 04, 2019 12:08 pm

there are several points to keep in mind here:

the navcache/navdb is not a "proper" SGSubsystem in the FlightGear sense, when we were developing the MapStructure framework, we ended up wrapping the corresponding navdb APIs so that we could override those with our own - this was primarily to test with proprietary/external navdata, or online navdata sources

That being said, it would not be complicated to patch fgfs and totally disable the navdb. But what you probably want instead is a way to re-map those APIs to an alternate source, this is commonly achieved using scripted Nasal delegates, I believe the route manager uses that approach.

Finally, under the hood, it's really just an SQLite database, so if you should find the corresponding people unresponsive, you can simply use an SQLite editor to look at the DB and come up with a python script to create a matching file.

I do agree that this is not very elegant, but it would at least work "as is" - obviously, when it comes to runways, airports etc - there remains the issue of possibly mismatching terrain/scenery data.
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