12.13.1 AziRef

Topic Version1Published11/11/2016
For StandardWITSML v2.0
Type:EnumerationStereotype:«Enumeration»

Reference to the azimuth of the trajectory

Table 12.13.1-1 Attributes

Name

Type

Notes

magnetic north

 

The north direction as defined by Magnetic North Pole at the time of the measurement. The Magnetic North Pole is the direction that a magnet points to when freely rotating.

grid north

 

The north direction is defined by the coordinate grid in the projection coordinate system.

true north

 

The north direction as defined by the true North Pole. The true North Pole is an average of the actual measured north axis, which is the axis of rotation of the earth.

unknown

 

The value is not known. Avoid using this value. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations.

Table 12.13.1-2 Associations

Association

Notes

From: AziRef.

To: TypeEnum

Generalization

 

From: Target.

To: AziRef

Dependency

 

From: Trajectory.

To: AziRef

Dependency