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  • The DTM is a homogeneous and regular point grid indicating the elevation of the ground level in order to make a model of its surface. The DTM is drawn up by interpolation (adaptable prediction) of raw altimetric data (contour lines, structure lines and spot heights).

  • AdminMap is the digital version of the administrative map. Two versions exist: the most complete one on the scale of 1:300 000 and a simplified version on the scale of 1:500 000. These maps show the different administrative units on the Belgian territory, from the federal State to the center of the districts for the 1:500 000. The map also shows the map grid of the National Geographic Institute. An index allows localizing the different units. The index also contains information on the linguistic statutes and on the postal codes.