Reference to the azimuth of the linear sampling feature. From WITSML v.2namespace
Diagram
Type
restriction of string
Facets
enumeration
magnetic north
The north direction as defined by Magnetic North Pole at the timeof the measurement. The Magnetic North Pole is the direction that a magnetpoints to when freely rotating.
enumeration
grid north
The north direction is defined by the coordinate grid in theprojection coordinate system.
enumeration
true north
The north direction as defined by the true North Pole. The trueNorth Pole is an average of the actual measured north axis, which is theaxis of rotation of the earth.