Electromagnetic pipe locators and GPR are complementary geophysical techniques to carry out utility surveys in a non-destructive way. While EM...

Electromagnetic pipe locators and GPR are complementary geophysical techniques to carry out utility surveys in a non-destructive way. While EM locators are ideal for tracking a specific service line, generally by inducting current, GPR is the ideal technique to identify non-metallic services - or any other service where manhole access or power supply are not at hand – as well as other underground features.