11.29 Volume Statistics

Name

Volume statistics -- Attribute that returns statistical properties

Description

This attribute extracts data from a cube or line using a small 3D probe and returns a statistical property from the samples collected.

Input Parameters

The probe is defined using relative times/depths and trace stepouts with respect to the actual location. The probe shape can be set by the shape field. Supported probes are:

• Cube: The three dimensions listed above define the 3D cube.
• Cylinder: The cylinder option requires the same settings as the cube, but traces outside of the ellipsoid will not be used.
• Optical stack: The probe is not 3D but a 2D vertical plane in the direction of the data, or perpendicular to it. This settings is useful only when applied on random lines where the azimuth is different from the inline and crossline direction.

Please note that the probe direction can be reduced by using:

• A [0,0] time gate: The probe becomes a flat rectangle or disk. Only one sample per trace is used at the actual time/depth.
• A 0 stepout: Only one sample is used in one or both directions.

Output

The following statistical properties can be output:

• Average
• Median
• Min, Max, Sum
• Variance
• Norm Variance
• Most Frequent
• RMS: Root Mean Square

Undefined values collected by the probe will not be used for the computation. In the case of a stack only the valid values will define the number of values.