This is one of the plans made in the early days of Joan Vilacasas, in Paris. Signed and dated by the artist : "During his stay in Paris, in the 1950s, he met Yves Klein. But in 1957 an important event in his artistic career took place, when the French critic Michel Tapié included him in the exhibition Art autre , together with established artists within informalism and abstract expressionism such as De Kooning, Dubuffet, Tàpies, Pollock, Tobey and Appel. It is the moment in which he begins to draw maps for a year. In other words, it is the time of his first planimetry, or what is the same, lines and spatial configurations. This interest in planimetry comes from the time he did his military service, since he was enrolled in the topographical section of the army, observing geographical accidents and "the territorial organizations through reliefs and linear structures". Precisely the critic Joan Cortés, referring to the planimetries, stated that "it is where he uses diverse plastic materials [...], with his vocation of plans and relief maps –without giving a sensation of relief, but giving us real relief, being relief themselves-”.