Altitude in Makerunways runways.xml is wrong

[roa]

Hi,

 

I am developing a small utility program for P3Dv4/FSX that reads the airport altitude data from the runways.xml file. When testing this app I now see that the altitude in runways.xml is not 

the same as given by P3Dv4 when sitting on an airport. The altitude I get from P3Dv4's MAP view are around 5 feets higher than what I have in runways.xml

The difference is not for just a specific airport, but seems be for all airports( At least those I have checked)

Why is there a difference? Isn't these data read from the same bgl files?

Edited March 13, 2018 by roa

[GHD]

If you are reading the altitude from the top-left of the screen, this is the distance from the ground to your aircraft CoG.

 

[roa]

Thanks, the difference is the distance from ground up to CoG.