In this paper the authors present the results of the tacheometric measurement portion of the Prądnik river flowing through the Ojcowski National Park (OPN). The coastline of the river is variable along its length. Does not coincide with the of the river evidence borders. The specificity of field work in the OPN requires the surveyor's knowledge of not only the law surveying, restrictions on protected areas as well. Methodology of work involves the use of different measurement techniques and the integration of gained data. The specific terrain makes it necessary to use different techniques and surveying equipment. The end result is a graphic design longitudinal profile of the river. Results for the longitudinal section above 3 km and 130 cross sections. In addition, the authors present a photographic documentation showing the coastline of the river and the stream at intervals of about 50 meters.The work will provide a base for further analysis in order to determine the flood zone of the mountain river. The problem of this analysis will be the subject of subsequent papers by the authors. ...
