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This CO is used to secure that a layer model does not overlap. The layers can be given priority from top or from downwards, or the truncation can optionally be divided into equal halves.

A layer in the layer model is checked towards the previous and eroded if overlapping.

All layers are written back into the folder. Therefore, if the original layers are to be kept, make a copy of the layer model first.

If using the operation with Half erosion, after running that feature set truncation option to Check and truncate from top and execute again to get the final truncation towards all layers above.

The intersection option, which is Off by default, is only applied if the defined area of a surface should intersect the next surface to be updated.

It is also possible to be 'creative' and take some layers temporarily out of the layer model using Copy and *Paste to workspace and deleting the same layers in the layer folder. The idea is to let other layers that those in sequence be subjected to mutual truncation. Afterwards add the temporarily saved layers back into the folder.

Take a copy of the MSL folder as a backup of a proper MSL set.
Rename the activated folder to a SRD folder.

NB!. This folder must originally be a MSL folder.

The menu will transfer all layer data in the folder to a new datum according to the formula below and the folder will then be a SRD folder.

New datum is transformed according to the shift value.

A positive shift value means that the datum is lifted up the same value.

New horizons: Z(SRD) = shift + sign * Z(MSL)

The use of this menu is actual when the reservoir layers are located above sea level and below sea level, for instance in Wadi areas.
It is then easier to apply standard calculation when all the layers are below a new datum.

A new layer model is generated from an existing layer model.

In addition one has to select a Start Horizon and a Truncation surface.

The Truncation surface will be the first layer in the new layer model.

All isopachs between the layers are generated with constant thickness specified in the menu for each horizon.