Mauro Caprioli 
e. 1:2000 MAPS: 
the digital files in DWG format containing the buildings shape with only the height on the ground, has been 
converted in DGN format compatible with MICROSTATION and MGE software by Intergraph. 
After that the roof height (available on the existing maps) has been added at each building, in the test area, in 
order to extrude the original shapes into a 3D objects and the existing ground spot height has been used too. 
In this way a 3D buildings representation has been elaborated unfortunately without the information about the 
roof geometry (terrace, roofs shapes, etc.). The resulting file, related to the test area, was ready to be used for 
geometry analysis such as Sections, Assonometry, 3 D vision, from different point of view, etc. in comparison 
with the Laser data on the same test area (see Fig. No.1). 
  
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Figure 1. 3D representation of 1:2.000 map of Pavia town 
e 1:500 Maps: 
For this scale maps DWG files containing 2D objects and 3D spot height were available, furthermore a roofs 
maps containing the roof shape and the roof height on TIF (raster) format were available too. Also in this case 
the same procedure as before has been performed in order to have DGN files with 3D buildings and where 
possible, the roofs shape (see Fig. No.2). 
  
  
134 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000.