International audienceAt the limit, the proposition "this point of space is visible or non-visible from this other point of space" is a strictly geometrical assertion; nevertheless, we will be able to continue the gathering, by integrating information on the sight distance, the proportion that is visible from a given object (for example a pylon) or the visual contrast with respect to a background, etc. such information layers are not trivial at all, even in a research that is directed to the peoples' true-life. It is not indifferent to notice the notions of exposition to the glance and of inter-visibility were firstly developed by the architects, in the approach of the relations between a space function and its insertion in the visual beams, and more generally in the approach of the inhabitant's well-being. From these introductive purposes, in this papers successively examine the technical outlines of inter-visibility, then its potentialities and its limits in the framework of an intervisibility taking into account in the territorial decision
