In order to study the seismic vulnerability of the buildings, one necessary data is the knowledge of façade size and the dimension/position of the windows/doors and other structural discontinuities. To well obtain such information for a lot of buildings in an urban area, this paper suggests a photogrammetric surveying by the integrated use of Mobile
Mapping Systems (MMS) techniques and CCD images. As usual for current architectural photogrammetry, by a CCD camera, terrestrial images are acquired in the best geometrical shot conditions. The 2D-surveying of building façades is then performed by the well-known digital image-rectification procedure. But at this time, the coordinates of the required control points are measured by a low-cost simplified MMS and not, as usual, by topographic methods. Therefore, for this application, we employ a MMS as well as a “3D-point sower”, namely to only measure with the best efficiency the 3D-coordinates of stacks of control points. From these East, North and Height coordinates, to compute the 2D-coordinates ones, with respect each single front, is very easy. By using a simplified MMS, original “pseudo-dynamic” analytical models have been proposed and tested during last years. Thanks to these algorithms, it is possible to recursively solve two classical MMS problems as well as the external orientation of its CCD and the
homologous point research by image matching. First interesting results of the application of this method on the historical center of Vittorio Veneto (Italy), test-site for a national research project on seismic risk, are finally explained.
