1. Method of locating a magnetic object disposed in a environment in which a system of coordinates is defined comprising an abscissa axis, an ordinate axis and a height axis, said method comprising: a phase of measuring at least one magnetic parameter at a plurality of measuring points in the environment in order to obtain a plurality of recorded values of this parameter at the measuring points that form a grid of recorded values; a phase of exploiting the recorded values, comprising the following steps: construction of at least one projective quantity; and application of the at least one projective quantity to the recorded values in order to obtain an estimated value of a parameter proportional to a susceptibility at a plurality of estimated points in the environment making it possible to obtain a location of said object.