While more and more buildings are digitized in 3D, giving rise to an impressive digital heritage which probably represents tens of millions of square meters, the question of the uses of this heritage can arise: what to do with these data? Of course, the transformation of point clouds into a BIM model is a natural goal; however, this requires a very sharp expertise and significant work for each building to be modelled.

During the digitization of a French cultural patrimony building representing a total of 50,600 square feet on four levels, we tested an interesting use of the point cloud on a part of the building: without going all the way to the BIM model, can we provide a 2D vector map in a fully automated manner? This article details the method and the results obtained.

First, from the 3D point cloud, we consider two main approaches to edge detection. The first, …

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