D'un possible seul Centre Pivot de tous les autres (André Verdet, L'obscur et l'ouvert) 1. Wrong directions Here are two maps showing the centre of Europe. Each one seems self-evident at first sight. But comparison shows they are absolutely meaningless. It seems that two European regions, although in different locations, are both claiming to be the centre of Europe and so in an enhanced position! (Maps 1 & 2). The idea underlying these maps is a highly intuitive one. It is based on analogy between the geographical centre that is sought and the geometric centre of the circle. What could be easier than drawing a circle around the chosen area and deciding that the centre of the area is the centre of the circle? The circle-centre couple is certainly the most convincing one too. Yet it is a very peculiar and very narrow view of an idea that is both much richer and much more elusive. Quite whether it is meaningful to represent a geographical area by the circle-centre pairing depends on whether the area is homogeneous and isotropic and on whether Euclidea
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