Transition Altitude

Introduction

ICAO Annex 15 defines Transition altitude as follows:

The altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes.

According to PANS-AIM, the transition altitude is only required for airspaces listed in section "AD 2.17/3.16 ATS airspace" (e.g. CTR).

Note

In AIXM 5.1.1, the transitionAltitude is an attribute of the AirportHeliport feature. There is no association between the Airspace feature and the AirportHeliport feature in AIXM.

Coding Example

Coding example can be found in the AIP Data Set - Specimen (DONLON).

No.DescriptionXPath Expression
AHP-EX-01Transition Altitude

//aixm:AirportHeliportTimeSlice[@gml:id='AHP_EADD']/aixm:transitionAltitude

References