Geophysical Survey at Land North East of Harpenden, Hertfordshire

Data was collected using a cart carrying four paired Bartington magnetic sensors. Four sensors mounted 1m horizontally apart and very accurately aligned to nullify the effects of the earth's magnetic field. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. Each data point is geographically referenced using an on-board Trimble RTK survey grade GPS system. Readings were taken at 0.125m centres along traverses 1.0m apart. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. The magnetometer survey has recorded magnetic responses that have been interpreted as being of archaeological interest. Ditch-like responses, trends and pit-like anomalies have been detected in the survey, including several enclosures of varying size in Areas 4 and 5. Weaker responses though Areas 2, 3 and 5 are also likely to have archaeological origins. Ridge and furrow cultivation has also been detected in Area 2. Uncertain anomalies have been marked across the site which are probably due to a combination of natural variations, agricultural processes or buried debris. Former field boundaries and natural anomalies have also been plotted across the data.