Earth Resistance survey
Earth Resistance surveys are a cost effective way of locating and mapping the foundations of buildings and formal garden features.
Usually carried out in small targeted areas the instrument works by passing a small electrical current through the earth and measuring the resistance. In a typical survey it would be expected that a wall or solid structure would offer high resistance while a ditch or large pit would produce low resistance.
Typical targets would include:
Walls – Foundations – Roads
Formal Gardens – Paths and Drains
Ditches – Large pits
Bedrock or Water table