[alfora]

Schau Dir einmal die ganz normalen FS2004-Flugpläne an. Die *.pln-Dateien enthalten ganz normalen Text. Du findest dort auch die Koordinaten, z.B.

[flightplan]
title=EDDF to EGLL
description=EDDF, EGLL
type=IFR
routetype=3
cruising_altitude=32000
departure_id=EDDF, N50* 01.34', E008* 32.34',+000364.00
departure_position=25R
destination_id=EGLL, N51* 28.16', W000* 27.10',+000080.00
departure_name=FRANKFURT_MAIN
destination_name=LONDON_HEATHROW
waypoint.0=EDDF, A, N50* 01.34', E008* 32.34', +000000.00,
waypoint.1=SOBRA, I, N49* 51.39', E007* 46.32', +01000.00, Y180
waypoint.2=ULKIG, I, N49* 52.11', E007* 43.10', +01000.00, Y180
waypoint.3=RUDOT, I, N49* 59.35', E006* 54.16', +01000.00, Y180
waypoint.4=BITBU, I, N49* 58.55', E006* 33.37', +01000.00, Y181
waypoint.5=MAKIK, I, N49* 58.12', E006* 10.02', +01000.00, UY181
waypoint.6=GOPAS, I, N49* 57.59', E006* 04.11', +01000.00, UY181
waypoint.7=DEMUL, I, N49* 57.47', E005* 58.43', +01000.00, UA24
waypoint.8=RITAX, I, N50* 04.40', E005* 48.25', +01000.00, UA24
waypoint.9=REMBA, I, N50* 39.44', E004* 54.50', +01000.00, UA24
waypoint.10=BUB, V, N50* 54.08', E004* 32.17', +01000.00, UL608
waypoint.11=DENUT, I, N51* 14.10', E003* 39.27', +01000.00, UL608
waypoint.12=COA, V, N51* 20.52', E003* 21.19', +01000.00, UL608
waypoint.13=KEGIT, I, N51* 24.25', E003* 06.24', +01000.00, UL608
waypoint.14=SASKI, I, N51* 32.53', E002* 30.00', +01000.00, UL608
waypoint.15=SUMUM, I, N51* 38.14', E002* 06.28', +01000.00, UL608
waypoint.16=LOGAN, I, N51* 44.51', E001* 36.42', +01000.00,
waypoint.17=EGLL, A, N51* 28.16', W000* 27.10', +01000.00,

Für einfache Flugpläne oder die ersten Versuche reicht daher auch der im FS9 eingebaute Flugplaner.