The analysis of comparison of ground data gathering technology for Digital Terrain Model generation by means of precise RTK/OTF method with GPRS for corrections transmission and direct tacheometric measurement technology were presented in this article. There are many methods which allow to acquire geometric information. The most accurate and reliable are direct measurement methods. With respect to the rate of measument data obtaining and opportunity of their simple updating, methods of automatic registration, e.g. GPS measurements, shoud be take into consideration. Direct satellite RTK GPS method let for gathering a lot of measurement points in relatively short period of time, as well as in cheap, fast and safe way.

57-66