[en] In this paper the output, results and experiences are reported which are found by the location of 10 local gas pipe lines with together 87,652 km length. The average daily output were 631 m in 9,3 h. The limiting depth is ca. 150 cm. With aids of the measuring values depth profiles of the pipe lines could be plotted, which shows that places where sewers cross the pipe or are near by and where are vertical levels. Also deformations and cloggings can be found during the location work so that after ending the whole work not only the precise location, length and depth of the pipe line are known but also the whole local gas pipe line is reorganized. 11 figs. (Author)