Surveys can take three basic forms. First there are methods based on conventional surveying techniques – plane table and level,  total station.   Secondly, there are the geophysics techniques of magnetometry, resistivity, gradiometry and ground penetrating radar, which strive to detect subterranean abnormalities, such as building foundations and buried objects. Third and last are the remote detection methods, such as aerial photography and LiDAR, both of which can involve the use of sophisticated image processing software.

How these methods were applied in detail during the project is discussed under 3 headings – LiDAR, Geophysics and our 2016 survey.