Volume Combo: combine your stratigraphic and structural attributes

Volume Combo: combine your stratigraphic and structural attributes

Luis Gomez on 02 Jul 2015
A powerful feature of GeoTeric is the ability to combine multiple attributes in a single "Volume Combo" attribute.  These volumes allow you to see structural and stratigraphic information in a single volume.  This post explains how to create a combined volume using the Volume Combo tool. The procedure for generating this volume involves just three steps:

1.  Scale your structural attribute (i.e. Dip, Tensor, SOS…):
  • Visualise the attribute and optimise the colour bar compression. Bear in mind that the colour compression cannot be modified once the volume combo has been produced.
  • Look at the Maximum value under proprieties and write it down.
  • Open the Parser (it is available under Processes & Workflows, Processes, Volume Maths, Parser) and apply the following expression:
    • For 32bit data: im1*(2147483647/Maximum value)
    • For 16bit data: im1*(32767/Maximum value)
    • For 8bit data: im1*(255/Maximum value)
2.  Scale your stratigraphic attribute (i.e. Envelope, Conformance…):
  • Visualise the attribute and optimise the colour bar compression in a similar way as you did with the structural attribute.
  • Look at the Maximum value under proprieties and write it down.
  • Apply the following Parser expression:
    • For 32bit data: im1*(4294967294/Maximum value)-2147483648
    • For 16bit data: im1*(65534/Maximum value)-32768
    • For 8bit data: (im1-128)*(255/(Maximum value-128))

3.  Create the Volume Combo:
  • Open the Volume Combo tool (it is available under Processes & Workflows, Processes, Volume Maths, Volume Combo). Select your input volumes (the 1st volume should be the structural attribute and the 2nd volume the stratigraphic attribute) and run the workflow.

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