A method of reconstructing, in two dimensions, a path of a living being or of an object moving, by a repetitive movement, in a plane or a two-dimensional surface or along a plane or a two-dimensional surface and including: measuring at least two variable components of the projection of the terrestrial magnetic field ON at least two axes of a biaxial or triaxial magnetometer connected to or situated ON the living being or object, measuring the period, or frequency, of a signal corresponding to the measurement of at least one of the variable components along one of the axes of the magnetometer, measuring the heading, or direction, of the movement, from at least two field measurements along at least two axes of the magnetometer and reconstituting the path from the measurements of period or frequency and of heading or direction.
