nsaprof.blogg.se - Miliary grid mapping

Related to this is the primacy of the southwest corner of the polygon being the labeling point for an entire polygon. When changing precision levels, it is important to truncate rather than round the easting and northing values to ensure the more precise polygon will remain within the boundaries of the less precise polygon. (In some cases, squares adjacent to a Grid Zone Junction (GZJ) are clipped, so polygon is a better descriptor of these areas.) The number of digits in the numerical location must be even: 0, 2, 4, 6, 8 or 10, depending on the desired precision.

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 coordinates provided.

12345678 (numerical location easting is 1234 and northing is 5678, in this case specifying a location with 10 m resolution)Īn MGRS grid reference is a point reference system.

FJ (the 100,000-meter square identifier).

The MGRS is used as geocode for the entire Earth.Īn example of an MGRS coordinate, or grid reference, would be 4QFJ12345678, which consists of three parts: The MGRS is derived from the Universal Transverse Mercator (UTM) grid system and the Universal Polar Stereographic (UPS) grid system, but uses a different labeling convention. The Military Grid Reference System ( MGRS) is the geocoordinate standard used by NATO militaries for locating points on Earth.