As well as mapping, Geophysicists at NGU measure and interpret the Earth's magnetic field, gravitational field, heat, electricity, radiation and electrical conductivity. This work involves both nationwide data collection and detailed study of the physical properties of rocks. In recent years, the calculation and modelling of heat flow in the Earth's crust has become a significant part of NGUs geophysical activities.
Geophysical maps are essential for bedrock mapping, especially in areas covered with sediments. Amongst other things, these maps show crush zones and deep weathering -- essential information for area planning and construction activities.