Protofiguration is a more than 400 hundred hands drawing resulting from collaborative surveys on the site of Saint-Sulpice, in the Ouest-Lausannois. The Drawing serves as a basis for the following exercise. It constitutes an intermediary milieu, between mental and physical, collective and individual, where the students are encouraged to inscribe themselves into a precise site, between the observation and the projection, blurring the obsolete frontier between measure and project.