Surveying is the art of determining the relative positions of various points on, above, or below the surface of the earth using direct or indirect measurements of distance, direction, and elevation. As per CMR-2017, every mine plan should have the name of the mine and the name of the owner and the purpose, a clear indication of true north, or the magnetic meridian and date. The scale of the plan shall be at least 25 centimetres long and suitably subdivided & representative factor of 2000:1 or 1000:1. Properly inked in on durable paper, tracing cloth, or polyester film and be kept in good condition. All the reference stations at the surface and the reference points of underground surveys shall be shown in their correct position relative to the survey of India national grid within the limits of error of survey and plotting.