Hi John,
> On 11 Apr 2020, at 12:24 AEST, John J Foster via 4D_Tech
> <[email protected]> wrote:
>
> Yes I understand all that and use the longitude to calculate MGT offsets and
> Latitiudes for Declinations and so on …
>
> I am fixing data - matching one set imported data from another source - and I
> also realize that I could use a good proximity routine (using the lon/lat and
> a distance to find other places).
>
> Couldn’t find anything in KB.
Check the archives of the iNUG, a looong time ago I posted the algorithms to
deal with that kind of things.
Position1 + Bearing + Distance [nm] ===> Position2
OR
Position1 + Position2 ===> Bearing + Distance.
If you can’t find it let me know and I’ll dive into the abyss of my hard
drives. ;-)
Cheers
Jörg
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