<< object >> Logical View.AIXM.AIXM Features.Shared.Surface Assessment
<<object>> [FAA 8260.3] The highest
airspace, obstacle or terrain relative to a prescribed plane within a specified area.
NOTE: In precision approach
procedures where obstacles penetrate the approach
surface, the controlling obstacle is the one which results in the requirement for the highest decision height (DH).
List of attributes
Name |
Data Type |
Definition |
|
|
requiredClearance | ValDistanceType
| Required altitude adjustment above any obstacle or terrain within a defined safety buffer region. The safety buffer allows for errors in the air and in the accuracy of data such as obstacle accuracy. This together with other adjustments (human factor adjustments, lighting adjustments, altimeter adjustments, etc). give the minimum altitude. |
|
|
minimumAltitude | ValDistanceVerticalType
| The value of the minimum obstacle clearance altitude. |
|
|
surfacePenetration | CodeYesNoType
| A code indicating whether the controlling obstacle penetrates the assessment surfaces. Rule: if surfacePenetration is "NO", then slopePenetration will not have a value. |
|
|
slopePenetration | ValAngleType
| A value calculated by dividing 102.0 (a constant) with the angle of the glidepath |
|
|
controlling | CodeYesNoType
| Indication whether it is a "controlling obstruction" for the associated ObstacleAssessmentArea. |
|
|
closeIn | CodeYesNoType
| "Close-In Obstacles" are those that would penetrate the 40:1 OCS and would require a climb gradient to 200 feet or less above the departure end of runway. So if an aircraft climbs at the minimum standard 200 feet per NM, "Close-In Obstacles" are those within 1 NM from the end of the runway. |
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|
Navigable associations from Obstruction
Association |
Multiplicity |
Role |
To |
Role description |
|
|
0..1 |
verticalStructureObstruction |
VerticalStructure
|
Vertical assessment controlling obstacle. |
|
hasApplied |
0..* |
adjustment |
AltitudeAdjustment
|
Operational factors applied to obstacle clearance altitudes to produce the safest usable altitude. |
|
isSituatedAt |
0..* |
obstaclePlacement |
ObstaclePlacement
|
location of obstacle in relation to a given point. |
|
hasAnnotations |
0..* |
annotation |
Note
|
|
|
Navigable associations to Obstruction
From |
Association |
Multiplicity |
Role |
To |
Role description |
ObstacleAssessmentArea
| isResolvedBy | 0..* | significantObstacle | The obstacle that controls the altitude definition of the assessment area would penetrate the 40:1 OCS | |
TerminalArrivalAreaSector
| isResolvedBy | 0..* | significantObstacle | The obstacle that controls the altitude definition of the sector. | |
NavigationAreaSector
| isResolvedBy | 0..* | significantObstacle | The obstacle that controls the altitude definition of the sector or would penetrate the 40:1 OCS. | |
SafeAltitudeAreaSector
| isResolvedBy | 0..* | significantObstacle | The obstacle that controls the altitude definition of the sector. | |