In the case of focused logs the thickness of the bed is given by the inflection points.

Laterolog answer in front of a thin resistive bed, with no invasion,
and a very salty mud (document IGL)

The traditional tools are usually recorded on a linear scale, but on certain old logs, one may find hybrid scales showing resistivity and conductivity. Now, the laterolog curves are recorded with a standardized logarithmic scale.

All resistivity measurements require a certain number of corrections to account for borehole effects. They are normally made using charts provided by the manufacturer. One must also make corrections according to the resistivity of adjacent layer.

When acquiring electrical log data (S.P. and resistivity), the borehole fluid makes up part of measurement. The conductivity of the borehole fluid must be taken into account when making corrections.

Example of laterolog 3 at the EPFL, Switzerland
(document IGL)