3D Magnetic Inversion

This dialog sets up the parameters for 3D magnetic inversion, which uses the SimPEG library. The Dataset Information section associates connected raster datasets with the either DTM or magnetic data. Data are output as a number of classes, in line with the lithology principle which PyGMI uses. The output from inversion can therefore be directly input into the modelling module.

The Model Extent Properties section sets up the model extents - by default from an associated DTM. Of importance are the X, Y and Z cell sizes. This determines the number of rows, columns and layers in the model. As a rule of thumb, models bigger than 100x100x100 may be slow, although this will depend on the hardware available.

Dataset Information

This is used to define the data connected to the modelling module. The data is either connected manually or will be embedded withing a 3D model file.

General Properties

These general properties are important for the inversion. If they are incorrect, or if there is extensive remanence in the are, the inversion results may be poor.

Model Extent Properties

The model extents control the area size and depth of your model, as well as its resolution. Typically one of your datasets are used to fill in most of the fields automatically. Because the DTM is compulsory to the modelling, this is normally the default choice.

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