 The system is based on a GPS map divided in grids.Over 600 hectares of the Boca de Potrerillos polygon are identified on a digital master grid that contains location of every rock, which is then recreated in three dimensions, using high definition digital photos.With the support of the Texas University, USA, petroglyph dating studies have been made by the Carbon 14 method which provide a total of 20 epochs, of which the oldest is 8,000 years.