Résumé : The possibilities offered by a novel experimental technique - the hodoscope hadron calorimeter - to determine coordinates of high-energy hadrons accurately by measuring the transverse spread of their associated showers have been studied. This accuracy is shown to improve with energy as (ln4E + q1E) 1 2/E and at E = 300 GeV it reaches σy = 3 mm. The shrinkage of the hadron shower and the growth of its central component with increasing energy have been measured. As for energy resolution, the hodoscope calorimeter does not yield to conventional calorimeters. © 1983.