For flatticroghan Mound Measured Apparent Resistivity Pseudosection Inverse Model Resistivity Section with topography Archaeological research (grave) - Topview: pseudosection of apparent resistivity Downview: Inversion result evidencing the sepulchral chamber (Waddell, J. Furthermore, three different techniques concerning topographical correction (Loke 2000) are available. You may also enter information concerning the electrical resistivity coming from investigations in wells or from other sources. for pollution plumes in the ground) or net edges (e.g. The 'smoothing* filter may be adjusted in order to emphasize the variations of relative resistivity in vertical or horizontal direction furthermore, it may be optimized for the obtainment of models with rounded edges (e.g. Three different versions of the minimum squares method are available for the inversion: a fast 'almost-Newton* method, a slower and more accurate 'Gauss-Newton* method, and finally a hybrid technique, rather fast and accurate at the same time. The program automatically selects the best inversion parameters for a certain set of data (those parameters may anyway be modified by the user). RES2DINV supports spreading types like Wenner, Schlumberger, Pole-Pole, Pole-Dipole, line Dipole, equatorial Dipole and other non-conventional spreading types. When using a normal computer equipped with a Pentium' microprocessor, the inversion of a single pseudosection will require only a few minutes.

It is completely automatic and does not require that the user formulates a starting model. ELECTRICAL IMAGING SYSTEM 16G DATA INVERSION SOFTWARE This very popular software, developped by M.H.Loke, uses the method involving the Sasaki minimum squares inversion (1992) to produce a 2D sub-soil model starting from the data of apparent resistivity (up to 2000 electrodes).

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