Volume and Display Interpolation Methods

The Interpolation method controls how values are obtained when interpolating between samples, for example when performing an amplitude extraction or displaying a horizontal slice through a volume.

Changing the Interpolation Mode

Select interpolate density display
  1. In the Control Panel, open the Class tab (see Creating a Class).
  2. In the tree, select a class to open the Details Panel.
  3. At Interpolation method, choose the mode at which the values are obtained when interpolating between samples.
    • Sinc — Use this for seismic data.
    • Edge Detecting — Use this for blocky data, such as impedance volumes.
    • Lagrangian — Use this for smoothly varying data, but not velocities.
    • Linear — Use this for ZT and TZ velocity volumes.
    • Nearest — Use this for integer volumes, such as "most likely LID".
    • Interval — Use this for interval velocities.
    • Angle 0 - 360 — Use this for interpolation based on the angle directions. Example classes that uses angle directions are Fast Direction, Dip Direction, Strike Direction and Dip Angle.
  4. At Display interpolation, select an option to control how data is interpolated onto the screen when zoomed in. Select Bicubic for a smooth display or select Nearest to see individual bins.
    • Nearest — Quickest to render but provides the lowest quality of result. Selecting this will apply the same value to all pixels within a bin, based on the nearest true bin value.
    • Bilinear — A simple linear interpolation between adjacent points to render the colour information and is slightly slower than the nearest neighbour method.
    • Bicubic — Uses bicubic splines between adjacent points to interpolate your data. This provides the best output at the expense of performance.
    • Direction — Use angle aware interpolation to display data.