Geophysical Mapping: Problem Details Problem Name: Foundations of ancient structures Problem Type: Buildings and Structures Assigned Methods: + Airborne magnetics Magnetic Methods + DC geoelectrics - Profiling Electrical Methods + Frequency-domain electromagnetics - Profiling Electromagnetic Methods + Frequency-domain electromagnetics - Sounding Electromagnetic Methods + Geoelectrics - Tomography (surface based) Electrical Methods + Ground magnetics Magnetic Methods + Ground penetrating radar (surface-based) Electromagnetic Methods + Ground penetrating radar - Borehole tomography Electromagnetic Methods + Seismic crosshole tomography Seismic Techniques 0 Airbore electromagnetic methods Electromagnetic Methods 0 Borehole imaging, Structure logging Borehole Methods 0 Geoelectrics - Crosshole tomography Electrical Methods 0 Micro gravity Gravity 0 Refraction seismic tomography (surface-based) Seismic Techniques 0 Shallow Water Seismics - Lake Seismics Seismic Techniques 0 Standard refraction seismics Seismic Techniques 0 VLF / VLF-R, Radiomagnetotellurics Electromagnetic Methods 0 Vertical seismic profiling (VSP) Seismic Techniques    '+' = Technique applicable; '0' = Application possible/limited use