World Geodetic System

Yeah, it doesn't care what the, the datum is, doesn't care what the coordinate system is.

We built it to do the transform that's necessary, so, like, you, you can't see it, but in the very bottom of this, all this is WGS84.

So-

Well, yeah, that's...

It's a surveyed point.

Half a meter accuracy, published to a hundredth of a second of arc, referenced to WGS-84.

Half a meter? Somebody stood there with a survey-grade receiver and measured it.

Eurocontrol's AIXM guidance is unusually blunt about this.