Re: [Flightgear-devel] NavData: XP NAV1100, FIX1101 and multiple nav.dat/fix.dat

[Szymon A. <ac...@mi...>]

On Thu, Mar 16, 2017 at 5:42 PM Florent Rougon <f.r...@fr...> wrote:

> James Turner <zak...@ma...> wrote:
>
> > That should be straightforward indeed, and gets my vote.
>
> So, if I understand right, FG would use the region codes in an opaque
> way for disambiguation purposes without knowing the extent of each
> region. This is under the assumption that a fix name or navaid ID is
> unique within an ICAO region?
>

"By classification into terminal vs global items, and assigning the correct
parent terminal area or ICAO region, each item in the database is
addressable by a globally unique identifier. Only then it is possible to
build the layered structure. X-Plane enforces integrity of this unique
index, because it is needed to build the graph of the airway network."
-- http://developer.x-plane.com/?article=navdata-in-x-plane-11

Szymon



>
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> Florent
>
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