The TriLayering algorithm is designed to provide a tool for modeling lithology datasets that represent layered but laterally discontinuous materials that do not laterally grade from one material type to another. The interpolation method creates a Delaunay triangle network for each layer and then projects the lithologies from the control points within that layer towards points that share the same triangle.
Advantages: The triangles projection can be subdivided at their limb midpoints or a random location somewhere in-between to the vertices so that you can modify to best match your data.
Disadvantages: The random extrapolation method will never generate the same model twice. Although the region immediately surrounding the boreholes will “honor” the borehole data, the interpolations between boreholes will randomly vary between the laterally surrounding lithologies.
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