Measures the ease with which a material can be magnetised. Effective for detecting features with magnetic contrast from the surrounding soil, including burnt features, pits, ditches, and intra-site activity zones.
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Electromagnetic Conductivity (EM)
Measures the ease of which current flow can be induced in material. Effective for detecting conductive features, such as geomorphology and subsurface landforms, ditches and earthworks.
Multiple earth resistance profile measurements are fused to create 2D sections and 3D profiles of electrical resistivity through the ground, commonly used to determine the depth of known features.
Measures the travel time of reflected high-frequency electromagnetic radiation. Effective for detecting abrupt interface changes and voids, for example foundation remains, graves, burial chambers and cellars.