The low velocity propagation of the seismic waves in the first meters of the sub‐surface and the topographic irregularities have an effect in the correct position of deep reflectors on seismic images. Velocity models builded using algorithms of tomographyc inversion have shown to be useful to correct this effect, but the solution has associated uncertainties. Three tecnhiques of uncertainty analysis are applied on a tomographical inversion of real near surface data, giving a measurement of the associated error. These tecnhiques are computationally expensive, because they explore intensively the model space. Eventhough, with the use of current high‐performing computers, their practical use have been made possible.