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These properties, which are considered as minimum for the AIP data set for FATO are mapped to the following main AIXM 5 features:
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In AIXM 5, the Runway and its associated classes are used to encode both Runway and FATO. The Runway.type attribute is used to define if the record is an instance of a Runway or a FATO. Hence, a FATO has to be encoded as Runway with type equal-to ‘FATO’. |
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| PANS-AIM | Description (PANS-AIM) | AIXM 5 | Definition (AIXM 5.1.1) | Remarks | |||||
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| Threshold point | The beginning of that portion of the FATO usable for landing. | RunwayCentrelinePoint.role equal-to'THR' | RunwayCentrelinePoint: An operationally significant position on the centre line of a runway direction. A typical example is the runway threshold. role: The role of an operationally significant position on the centre line of a runway direction. | ||||||
| Threshold point - Position | Geographical location of FATO threshold point | RunwayCentrelinePoint.location.ElevatedPoint, and RunwayCentrelinePoint.location.ElevatedPoint.horizontalAccuracy | location: Geographical position of the runway centreline point. horizontalAccuracy: The difference between the recorded horizontal coordinates of a point and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ||||||
| Threshold point - Elevation | Elevation of the FATO threshold | RunwayCentrelinePoint.location.ElevatedPoint.elevation, and RunwayCentrelinePoint.location.ElevatedPoint.verticalAccuracy | elevation: The vertical distance of the point measured from Mean Sea Level (MSL). verticalAccuracy: The difference between the recorded elevation of a point and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability. | The verticalAccurracy encoded refers to both the elevation and the geoidUndulation. | |||||
| Threshold point - Geoid undulation | WGS-84 Geoid undulation at FATO threshold position | RunwayCentrelinePoint.location.ElevatedPoint.geoidUndulation, and RunwayCentrelinePoint..location.ElevatedPoint.verticalAccuracy The verticalAccurracy encoded refers to both the elevation and the geoidUndulation | geoidUndulation: The distance of the geoid above (positive) or below (negative) the mathematical reference ellipsoid at the location of the point. | According to ICAO Annex 14, Volume II
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| Designation | The full textual designator of the landing and take-off area. | Runway.designator | |||||||
| Length | The longitudinal extent of FATO | Runway.nominalLength Runway.lengthAccuracy | |||||||
| Width | The transversal extent of FATO | Runway.nominalWidth | AIXM 5 provides a Runway.widthAccuracy attribute. But accuracy is not specified for the width of a FATO in PANS-AIM. Warning |
(For "TLOF width" and "Runway width" PANS-AIM defines an accuracy.) |