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Gene

Generate Contour from Grid

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Hi all,

After a 3D Stratigraphy Model has been generated, I want to form a contour map of a certain strata (e.g. a rockhead contour).

I used Stratigraphy/Structural Elevations/2D and selected the top layer of the strata.

A contour map was formed, however, the result does not take the ground surface in consideration.

Strata does not truncate above the ground surface.

How can I fix the problem?

Thanks

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Hi Gene,

When creating the Stratigraphic Model, choose the option to Constrain Model Based On Ground Surface to use an existing GRD file of the surface elevations to constrain the model. If you do not have an existing surface elevation GRD file, use the Map | Borehole Locations menu command and turn on the option to create the Surface Contours.

Thanks,

Tom B

[email protected]

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Hi Tom B

Thanks for answering.

But seems you misunderstood my question.

I have chosen "Constrain Model Based On Ground Surface" when I generate the Stratigraphy Model.

After that, I want to generate a rockhead contour base on the generated model. (using Stratigraphy/Structural Elevations/2D )

However, the contour generated shows the rockhead above ground level, which is not true.

Seems the contour does not "Constrain Model Based On Ground Surface"

How to tackle this problem in this case?

Thanks

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Hi Gene,

The menu command Stratigraphy | Structural Elevations | 2-Dimensional creates a new GRD file without the option to constrain the results to the ground surface.

To use an existing GRD file previously created with the Stratigraphy | Model command, use the Utilities Map | Grid-Based Map menu command.

Thanks,

Tom B

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