3 concepts of the north in map reading

3 concepts of the north in map reading true north, grid north and magnet north




North is geographically defined as a zero degree bearing. In geography there are three types of north

  • True north. This is position of geographical north pole. all longitudes meets at true north. It is usually represented by star on sign of topographical map
3 concepts of the north in map reading true north, grid north and magnet north
  • Magnetic north. This is direction to the magnetic north pole, as shown by the north seeking needle of compass. When a needle of compass is left to swing freely, it comes to rest in north – south position. Its north point shows the earth’s magnetic north. This type of north vary from place to place and from time to time. It is usually represented by a line ending with a half of arrow head




  • Grid north. On most topographical maps, there are lines that are drawn north to south. These lines are called grid lines (eastings). they meet at point in the north pole called grid north. It is symbolized by latter GN.
3 concepts of the north in map reading true north, grid north and magnet north

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