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NAVITEQ establishes the first nationwide GNSS network in Bulgaria. It is a private project that offers an inexpensive way of precise positioning by transmitting correction data. The main purpose is to provide services to GNSS users that need centimeter and sub-centimeter accuracy. NAVITEQ provides three types of services called Naviteq Post Processing, Naviteq VRS and Naviteq PreciseRTK. There is another service in real time mode that is under development. The NAVITEQ reference stations positions are determined in...

The contemporary construction on the territory of Sofia requires more and more responsible execution of the geological researches. The drilling of deep construction pits, as well as the construction of high-rise buildings (with more than 100 m height), are connected with serious problems, especially in the anti earthquake security insurance. One of the important questions which were raised in the construction of Metrostation 7 in the Sofia’s centre, as well as in the designing of Europa Center, having 180 m offi...