System for determining the location of pipelines

A system for determining a location of at least one pipeline having at least one geopig which is introduced into the at least one pipeline, moved forward in said at least one pipeline and which comprises a magnetic source for generating a magnetic field, the system comprising:

• at least one unmanned aerial vehicle having position determining devices;
• a plurality of magnetic field sensors attached to the at least one unmanned aerial vehicle and arranged in a cross-shaped manner which detect a course of a field strength of the magnetic field and maintain positioning of the at least one unmanned aerial vehicle at a defined distance from the at least one geopig;
• and
• means for determining a location of the geopig from a position of the at least one unmanned aerial vehicle and the defined distance between the at least one geopig and the at least one unmanned aerial vehicle.