Geophysical Survey
An Archaeological Geophysical Survey is a non-intrusive method used to investigate what lies beneath the ground without excavation. KAS Archaeological Services offers professional magnetometry surveys, providing a rapid and effective way to identify buried archaeological features and inform the early stages of the planning process.
Magnetometry works by measuring small variations in the Earth’s magnetic field caused by archaeological features below the surface. Past human activity - such as the digging of ditches and pits, the construction of hearths, or the accumulation of occupation deposits - often alters the magnetic properties of the soil. By systematically surveying a site using sensitive magnetometers, it is possible to detect these subtle changes and produce detailed plots showing potential archaeological features. The results can reveal patterns such as settlement enclosures, field systems, trackways, and other subsurface remains.
Within the UK planning system, geophysical survey is frequently recommended as an initial stage of archaeological investigation where a site has potential for buried remains. Because it is fast, cost-effective, and non-destructive, magnetometry allows large areas of land to be assessed quickly. The survey results can then guide more targeted investigation, such as archaeological evaluation through trial trenching, helping to focus excavation on the most archaeologically sensitive areas of a site.
KAS Archaeological Services carries out magnetometry surveys using modern equipment and established field methodologies, producing clear graphical results and professional interpretative reports. Our work is undertaken in accordance with recognised professional guidance, including the standards of the Chartered Institute for Archaeologists (CIfA). The resulting survey reports provide planners, developers, and heritage advisors with reliable evidence to support informed decision-making and the responsible management of archaeological heritage within development projects.