Explicit modelling in geological modelling is essentially akin to an engineering drawing process. The modeller defines geological structures such as veins and faults by explicitly drawing them on regularly spaced sections and joining them. The data may be used by the modeller to constrain where they draw, and there may be tools to accelerate the process, but fundamentally it is a process of drawing. This suits the engineering world where an exact definition of a structure is a precursor to its construction.

This catalogue details each of the items in the pinnable Insert list for Calculations and Filters. Each item includes an intentionally trivial example to illustrate the use of the item, along with an explanation of the effect of the expression <...>