On Tue, 7 Jun 2005 11:19:02 -0700, Drew wrote in message 

> Is there a reliable way to determine the terrain height below the
> aircraft that is independent of the view being used?  I've tried the
> property "/environment/ground-elevation-m", but when I use tower view,
> it returns the elevation at the view origin.
> I'm trying to develop an RC-type application, so knowing the height
> from the controller's position is worthless.  How can I get the
> terrain height below the aircraft?  It would be helpful if I could
> determine the height of any arbitrary lat/lon position, as well, if
> that's possible.

..think "gun elevation", as in "aim at it."  I view your terrain height
angle a detour, you fly either above _or_ in front of terrain, and
orient your plane relative to yourself and vice versa, looking at it.

..med vennlig hilsen = with Kind Regards from Arnt... ;o)
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.

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