Hi, Jan! I'm glad to read the Readme.txt. It's has been wrote by professional pilot. Thank you for the kind words.
myb
commented
in reference to scenery pack
81916on January 5, 2021 2:40 PM
In accordance of Aeronautical Information Circular AIC 04/09 12.04.2009(Russia), currently valid, a difference between the coordinates PZ-90(Earth Parameters) and WGS-84(World Geodesic System) is: delta X=-0.36 m; delta Y=0.08 m; delta Z=0.18 m., where X,Y,Z are the coordinate axes from the Earth center. This range is about 6400 k meters. For the practical airnavigations purposes it mean WGS-84 = PZ-90. As a confirmation, look at /X-Plane 11/Resources/default data/CIFP folder, where saved a lot of Airports data. Check up URMO.dat, for example. The last two lines are the runways coordinates, wrote in format deg/min/sec, they match with an official published document (PZ-90 coordinate system). Meanwhile, KSEA.dat, for example, has containing the runways coordinates in WGS-84.
The same result, we'll get, while have investigate the earth_nav.dat to understand a difference between WGS-84 and PZ-90. Answer is one: no difference.
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Hi, Jan! I'm glad to read the Readme.txt. It's has been wrote by professional pilot. Thank you for the kind words.
In accordance of Aeronautical Information Circular AIC 04/09 12.04.2009(Russia), currently valid, a difference between the coordinates PZ-90(Earth Parameters) and WGS-84(World Geodesic System) is: delta X=-0.36 m; delta Y=0.08 m; delta Z=0.18 m., where X,Y,Z are the coordinate axes from the Earth center. This range is about 6400 k meters. For the practical airnavigations purposes it mean WGS-84 = PZ-90. As a confirmation, look at /X-Plane 11/Resources/default data/CIFP folder, where saved a lot of Airports data. Check up URMO.dat, for example. The last two lines are the runways coordinates, wrote in format deg/min/sec, they match with an official published document (PZ-90 coordinate system). Meanwhile, KSEA.dat, for example, has containing the runways coordinates in WGS-84. The same result, we'll get, while have investigate the earth_nav.dat to understand a difference between WGS-84 and PZ-90. Answer is one: no difference.