The adaptation of computer aided tomography (CAT) scan technology to tomographic analysis of geologic features such as fractures and differing rock types. In geotomography, the software analyzes the energy ray paths between a transmitter and receiver that are placed in separate drill holes, at various locations along a single drill hole, or along an underground opening. Various types of energy waves, such as seismic, acoustic, electromagnetic, or X-rays, can be analyzed by the computer software to create an image.