This text describes the change in land management procédures carried out by a practitioner while working in resort development in a forest milieu. Noting the public opposition to the projects in which he has participated, the author emphasises the necessity of revising the usual approach of planning. He proposes a new look at the notion of territory, defined as the relation to space established by an actor (individual or social group) through concrète or abstract actions. He demonstrates the limits of the traditional procédure which takes a narrow view of the milieu. This type of procédure focuses notably upon the territory of the actors interested in development and neglects lands belonging to others. The proposed approach is différent in that it takes into considération the territories of the numerous actors affected by a project. This new approach is based upon a survey and involves the participation of ail actors, from the very beginning, in various phases of the planning process. The author ends with the thème of postmodernity and states that the approach outlined aims at a postmodern form of planning.