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1234 5678 (numerical location; easting is 1234 and northing is 5678, in this case specifying a location with 10 m resolution) An MGRS grid reference is a point reference system. When the term 'grid square' is used, it can refer to a square with a side length of 10 km (6 mi), 1 km, 100 m (328 ft), 10 m or 1 m, depending on the precision of the ...
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Extensions to the above notation allow the GEOREF system to be used to designate an area around a reference point. This is achieved by adding an area designation to a base GEOREF co-ordinate. The area designation can be the letter S, to specify the sides of a rectangle (separated by the letter X); or the letter R, to specify the radius of a circle.
The first basic military map symbols began to be used by western armies in the decades following the end of the Napoleonic Wars.During World War I, there was a degree of harmonisation between the British and French systems, including the adoption of the colour red for enemy forces and blue for allies; the British had previously used red for friendly troops because of the traditional red coats ...
This was known as a Grid, so that there were now 81 total grid squares within a sector. Each grid was given a two-digit designation, so the Grid System would now have two alphabets and two digits. Each of these Grids were again divided in the same manner – first into a 3 x 3 matrix, and then each matrix was divided into nine squares, so that ...
The first use of national insignia on military aircraft was before the First World War by the French Aéronautique Militaire, which mandated the application of roundels in 1912. [1] The chosen design was the French national cockade , which consisted of a blue-white-red emblem, going outwards from centre to rim, mirroring the colours of the ...
Another is the R95, which is the radius of the circle where 95% of the values would fall, a 95% confidence interval. The concept of CEP also plays a role when measuring the accuracy of a position obtained by a navigation system, such as GPS or older systems such as LORAN and Loran-C .