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Find GPS coordinates of any place on earth
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True North on Google Maps is not shown, but for a normal Mercator projection, grid north and true north will coincide and it will follow any vertical line (or meridian) to the top of the map. The Mercator map was designed as an aid to navigators since straight lines on the Mercator projection are loxodromes or rhumb lines – representing lines of constant compass bearing – perfect for ‘true’ direction. The Mercator map was developed in 1569 by Gerardus Mercator as a navigation tool based on a rectangular grid with parallel lines of latitude and longitude. Google Maps use a variant of the Mercator projection for its map images. The horizontal angular difference between True North and Magnetic North is called MAGNETIC VARIATION or DECLINATION. The magnetic north pole is currently located in the Baffin Island region of Canada, and from the UK, is west of true north. The difference between grid north and true north is very small and for most navigation purposes can almost always be ignored.Ī compass needle points to the magnetic north pole. This variation is smallest along the central meridian (vertical line) of the map, and greatest at the map edges.
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The grid lines point to a Grid North, varying slightly from True North. The grid lines on Ordnance Survey maps divide the UK into one kilometre squares, east of an imaginary zero point in the Atlantic Ocean, west of Cornwall. True North on a map is the direction of a line of longitude which converges on the North Pole. The ends of the axes are the True North and South poles. Each day the Earth rotates about its axis once.