How does X-Plane's local coordinate system relate
real world coordinates?
The entire X-Plane environment runs in a local coordinate
that contains a 3x2 degree chunk of the earth's surface, with you
near the middle. As you travel, X-Plane adds whole degrees of scenery
front of your and drops them behind you.
X, Y, and Z in the local coordinate system are defined as
I say approximately because X-Plane models a round world, so unless
at the equator the latitude lines are curved, and the earth's surface
- X relates to Longitude - Positive is east (approximately)
- Y relates to Altitude - Positive is up (approximately)
- Z relates to Latitude - Positive is south (approximately)
Units are in meters. The XYZ space mapped by X-Plane is an area
of longitude wide and 2 degrees of latitude high, approximately
on the aircraft. The origin is the center of the space; zero Y is
sea level. The space is oriented such that X, Y, and Z exactly line up
with east, up, and south at the center of the 3x2 space.
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