Trace Chooser

Description Include or exclude traces from a volume using one or more header-based constraints.
Module(s) Explorationist, Gather Attributes
Requirements Volume
Related Header Maths, Volume maths, Volume Maths (simple)
Works with 2D, Stacks, Gathers, Dip Fields

This process retains or drops traces using one or more header-based constraints. 

To be kept, a trace must pass any criteria for all headers. For any given header, the following rules apply in the order listed below:

  • A trace is dropped if it meets any of the Exclude conditions.
  • A trace is dropped if it meets none of the Include conditions (and there is at least one such Include condition).

If you use a header that fundamentally defines the volume, the output volume will reflect that constraint. 

For example, applying the rule Include / INLINE / In Range / 500–600 to a 3D volume will result in an output volume with an inline range of 500–600. When you filter on other headers, the output volume extents will not change.

Create a Trace Chooser process

Create a Trace Chooser process
  1. In the Process tab, click the Add icon and select New Process.
  2. Select Trace Chooser and type a name for the process.
  3. In the Details Panel, select the Volume to choose the traces.
    • Include/Exclude — Include or exclude the data according to a constraint.
    • Trace Headers — Trace headers on which the constraint is applied.
    • Constraint — The constraint applied to retain or drop the data. Options available are listed below:
      • Greater Than
      • Equals
      • Less Than
      • In Sequence — matches a value in the provided sequence(s) (one sequence is first-last[step] and you can provide multiple comma-separated sequences
      • In Range
      • Modulo Equals — matches a value which, when divided by the first number, gives a remainder of the second number
      • Bit is Set — matches a value with this bit set, when bit 0 is the least-significant (i.e. bit 0 corresponds to 2^0, bit 1 is 2^1, etc…).