Reference altitude options for waypoints.
| Member | Value | Description |
|---|---|---|
| eWayPtAltRefUnknown | -1 | Unknown. |
| eWayPtAltRefMSL | 0 | Referenced to Mean Sea Level. |
| eWayPtAltRefTerrain | 1 | Referenced to the terrain under the vehicle's route (if terrain sources are loaded into the scenario). |
| eWayPtAltRefWGS84 | 2 | Referenced to the central body's reference ellipsoid (WGS84). |
| eWayPtAltRefEllipsoid | 3 | Referenced to the central body's reference ellipsoid. |





