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The aim of the article is to present selected experience with updating the digital technical map (DTM) dataset in the Czech Republic after 2 years of its widespread introduction into operation. The subject of the analyses was the methods of initial filling of the basic spatial situation (ZPS) data with new mapping of land roads and defined territories of technical infrastructure administrators. When updating the ZPS, accuracy problems of vectorization from LIDAR mobile mapping data and problems of the results of p...

The paper deals with the experience of engineering geological surveys of problematic sections of motorways D47 and D2 in the Czech Republic. Into selected sections of the D47 motorway near Ostrava waste material of blast furnace slag was deposited, which proved to be very problematic. Another problem solved was the solution of surface and embankment defects of the D2 highway near the town of Hustopece, located in Moravia, where in some places there have been surface drops of up to several centimeters. In the emban...