Since our formation in 1999, Substrata has specialised in providing archaeological geophysical surveying services to architects, engineering and construction companies, commercial archaeological organisations, government bodies, trusts and individuals. We specialise in magnetometer and earth resistance surveys. We also provide other archaeology-specific geophysical surveys such as ground penetrating radar and resistivity. The particular method or combination of methods used depends on local soil conditions and the survey requirements. These methods are capable of delivering fast and accurate assessments of the archaeology of both large and small sites.