“Depth and connectivity” in investigations refers to understanding the vertical extent of a target or anomaly (depth) and its interconnectedness, either with its surroundings or within the target itself. Depth of investigation (DOI) quantifies how deep a method can effectively “see” into the subsurface, while connectivity describes how the detected features relate to each other spatially and electrically. These concepts are crucial in various fields, such as geophysics, for determining the extent of subsurface targets and for understanding electrical properties.Â