 The following year Carlos Ibáñez e Ibáñez de Ibero was appointed to undertake this task.All the scientific and technical material had to be created.Ibáñez e Ibáñez de Ibero and Saavedra went to Paris to supervise the production by Brunner of a measuring instrument which they had devised and which they later compared with Borda's double-toise N°1 which was the main reference for measuring all geodetic bases in France and whose length was 3.8980732 metres.