Buildings collapses are rampant today due to people’s ignorance about subsurface pattern. Industries making use of heavy machines may be victims of building collapse if such industries have their factories built on fractured zones. It is therefore imperative to carry out geophysical survey before building construction commences to avoid collapse which lead to loss of life and properties that are unquantifiable. This book introduces the user to the efficacy of using Groundmagnetic and Electrical Resistivity geophysical techniques in the study of basement pattern. It explains the basic knowledge to interpreting the Groundmagnetic and Electrical Resistivity method and gives some precautions to be taken in laying of factory foundation. Finally, it gives insight on how to use the integrated geophysical techniques for hydrogeologic prospecting.