David Megginson writes:
> Different intersections and fixes server different purposes: the ones
> around KSFO are probably parts of various instrument approaches, and
> we would need most or all of them to simulate ATC or an
> approach-certified GPS.  Just around Ottawa TCA, we have quite a few
> intersections.  Here are the ones you'll find on an enroute chart,
> serving both for navigation through the Ottawa area and for transition
> from enroute to approach:
> 
>   LORKA
>   EBNYR
>   ASHTN
>   AGLIN
>   THURO
>   AVVON
>   REEDO
>   ULAMO
>   LANRK
>   CYRIL
>   HUXLY
>   FANOL
> 
> But those don't tell nearly the whole story.  Most instrument
> approaches add more waypoints that don't appear on the enroute charts.
> For example, the ILS or NDB 32 approach adds the TEXEN GPS fix, while
> the ILS or NDB 07 approach adds the VISOL GPS fix.  And so on.
>   
> The DAFIF contains quite a few additional fields, including a usage
> code -- you could use that as a filter for generating different kinds
> of maps.

That might be the thing to do.  Fixes are something I'd have no
hesitation to switching to DAFIFT format.

Regards,

Curt.
-- 
Curtis Olson   IVLab / HumanFIRST Program       FlightGear Project
Twin Cities    [EMAIL PROTECTED]                  [EMAIL PROTECTED]
Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org

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