3D ground scanner

Create a large mesh composed of very small VLF coils separated by the mesh and encased inside. Four coils near each other will be using varying phases to detect at different depths. Use a computer algorithm to calculate overflow from one VLF coil to another next to it. |Combine all the resonances to create a highly detailed 3d map of what's in the ground under the detector. The smaller the VHF coils can be made while keeping the signals separate, the higher detailed the picture can be.