Modelling tools

Modelling tools#

This section contains the tools necessary to create the actual model. Modelling in PyGMI works like a paint program, with the user selected a specific lithology and drawing on either the profile or layer view.

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Modelling tools.#

The tools are:

  1. Lithology list – Use this to select the lithology you want to draw in. To erase, simply select the Background lithology and draw with that.

  2. Line Thickness – This allows you to change the pen thickness which you are drawing with. It is in terms of voxel/cell size.

  3. Ranged Copy – The ranged copy function allows for the copying of a lithology on the current profile or layer over a range of profiles or layers. To copy profiles, select Side View and Top View lets you copy layers.

  • Master Profile – The profile/layer with the lithology/lithologies that you want to copy.

  • Range Start – The first profile/layer of the range of profiles/layers to which the lithology/lithologies must be copied.

  • Range End – The last profile/layer of the range of profiles/layers to which the lithology/lithologies must be copied.

  • Lithologies To Copy – Select the lithologies to copy.

  • Lithologies to Overwrite – Select the lithologies that can be overwritten.

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Ranged Copy modelling tool.#

  1. Add Lithological Boundary – Adds a raster to be used as a lithological boundary. It can be used if you have, for example a raster of the surface of the bedrock to add to your model. You will be prompted to select a raster layer and then select how it will be used:

  • Lithologies Above Layer – You can choose not to change the current model above the boundary layer or select a lithology that must constitute the entire model above the boundary layer.

  • Lithologies below Layer – Select whether to keep the model unchanged below the boundary layer, or the lithology that must be used for the entire model below the boundary layer.

  • There are two options for the units of the Z coordinates of the raster layer that will form the lithological boundary. It can either be in depth below the surface or height above sea level.

_images/pfmodmodeltools3.png

Tool to add a lithological boundary to a model.#

Tip

The ranged copy function for the Layer View can be very useful in getting a starting model going. Draw in your basic lithology boundary based on a geological map or the geophysical data (displayed behind the model) and copy it over a range of applicable depths.