Geophysical Mapping: Problem Details Problem Name: Soil / rock quality Problem Type: Civil Engineering Assigned Methods: + Acoustic logging Borehole Methods + Borehole imaging, Structure logging Borehole Methods + Electrical and induction logging Borehole Methods + Geoelectrics - Crosshole tomography Electrical Methods + Geoelectrics - Tomography (surface based) Electrical Methods + Ground penetrating radar (surface-based) Electromagnetic Methods + Ground penetrating radar - Borehole tomography Electromagnetic Methods + Refraction seismic tomography (surface-based) Seismic Techniques + Seismic crosshole tomography Seismic Techniques + Seismic surface waves methods Seismic Techniques + Shear-wave reflection seismics Seismic Techniques + Technical logging Borehole Methods + Tunnel Seismic Prediction (TSP) Seismic Techniques + VLF / VLF-R, Radiomagnetotellurics Electromagnetic Methods 0 DC geoelectrics - Profiling Electrical Methods 0 DC geoelectrics - Sounding Electrical Methods 0 Nuclear logging Borehole Methods 0 Shallow reflection seismics Seismic Techniques 0 Vertical seismic profiling (VSP) Seismic Techniques 0 Very-high resolution reflection seismics Seismic Techniques    '+' = Technique applicable; '0' = Application possible/limited use