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In our high-tech world there is a lot happening below the ground and if one wants to start a building venture it is crucial to find out whether this is secure not just on the ground. A lot of damage can occur if any kind of unexpected utility locating gets hit and the effects may not just be finacial but, even worse, can hurt people. Hence solid planning and reliable underground mapping are one of the most significant tasks that need to be prepared ahead of the start of the first works on a constructing site. Generally public utility lines need to be detected and properly marked for the construction workers and excavators to evade. And there are so many of them, including phone or television lines along with all forms of communication and power mains, to name the most harmless ones. Then there are the most risky encounters underground that need to be treated with the greatest care, for example water and gas pipelines, and also oil pipelines can be found; and all of these must be detected with dependable underground utility mapping. A different peril pose road gullys or water mains, as well as pipes for wastewater or gatherings of natural gas. In urbanized stretches, though not solely, the room beneath the ground could be already depleted by railway tunnels or tunnels for short-range transit. Therefore, to detect and accurately visualise these lines and underground obstacles different instruments can be employed by cartographers. Different kinds of materials situated in these utilities call for various equipment that can detect and locate very exactly all the relevant mains. Magnetic equipment are one possibility, radio detection and ranging mixed with GPR are another. For getting an utterly complete location job completed, it is mostly inevitable to utilize all of the different instruments, and it is important to always get the most up to date underground maps done because even below the ground things are in a constant change and in many cases scantly documented.