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From: martin@cat.de (Thomas Martin)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Microsoft Flight sim and lat/long coords
Message-ID: <m^soj2.^51@cat.de>
Date: 19 Jun 91 23:41:35 GMT
Organization: C.A.T. Kommunikations-System
Lines: 42



>Does anyone know how to convert a latitude and longitude designation
>to the internal coordiantes for the M/S flight sim 4.0... I have the
>base coord of 0 x 0y ( Champaign, Ill . ) but I have no idea how the
>increment works.

Hi Phil!

In an old Computer magazine I found a formula to convert the FSIII coordinates
to the common longitude/latitude values:

Note that the East coordinates depend on the scenery used and that the North
coordinates refer to the west of Greenwich.

N=(B*17586/49.5)

E(european scenery)=(52.31965 - L) * 263.60656

E(american scenery)=(135.366 - L) * 340.625

B: Latitude in degree
L: Longitude west of Greenwich (Longitude values east of Greenwich have to be
   entered as negative values) e.g. 11.7 degree east= -11.7 degree

N: North coordinate of FSIII
E: East coordinate of FSIII

I tried these formulas with FSIV. It works fine with the old european scenery
from FSIII which I use with FSIV but unfortunately it seems as if Microsoft
has changed the internal coordinate system in FSIV because the positionning
in the american (FSIV) scenery is not as exactly as in the european one.

Nevertheless, I hope that helps somehow.

Regards,

Thomas Martin

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  Thomas Martin (martin@cat.de)                     
  C.A.T. Kommunikations-System, Frankfurt, Germany