Geophysical Mapping: Problem Details 30 of 39 Problem Name: Quality of roads/ airfields Problem Type: Buildings and Structures Assigned Methods: + Ground infrared thermography Thermic Methods + Ground penetrating radar (surface-based) Electromagnetic Methods 0 Refraction seismic tomography (surface-based) Seismic Techniques 0 Standard refraction seismics Seismic Techniques    '+' = Technique applicable; '0' = Application possible/limited use