Rail block

Brussels-Capital Region : the entity "Rail Block" (railway area) identifies portions of the territory occupied by the railway. These surfaces not lines representing the rails. There are: 1. areas of railway located at [0] (ie ground level "natural", abbreviated RB-0): - Areas in a physical island - Crossing 2. areas of railway located at [-] (ie ground level, abbreviated RB-M): - Parts of railway under a road (invisible from the sky) - tunnels 3. zones thereof located at [+] (ie higher level short RB-P): - Parts of railway over a road or a river (visible from the air) The contours of the airspaces of the railway were built from the topographic map UrbIS-Topo (photogrammetric surveys). The tunnels were designed based on drawings provided by SNCB.