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USNG
The United States National Grid (USNG) is a multi-purpose location system of grid references used in the United States. It provides a nationally consistent "language of location", optimized for local applications, in a compact, user friendly format. It is similar in design to the national grid reference systems used in other countries. The USNG was adopted as a national standard by the Federal Geographic Data Committee (FGDC) of the US Government in 2001. Overview While Geographic coordinate system, latitude and longitude are well suited to describing locations over large areas of the Earth's surface, most practical land navigation situations occur within much smaller, local areas. As such, they are often better served by a local Cartesian coordinate system, in which the coordinates represent actual distance units on the ground, using the same units of measurement from two perpendicular coordinate axes. This can improve human comprehension by providing reference of scale, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Grid Reference System
The Military Grid Reference System (MGRS) Datums, Ellipsoids, Grids, and Grid Reference Systems is the geocoordinate standard used by NATO militaries for locating points on Earth. The MGRS is derived from the Universal Transverse Mercator coordinate system, Universal Transverse Mercator (UTM) grid system and the Universal polar stereographic coordinate system, Universal Polar Stereographic (UPS) grid system, but uses a different labeling convention. The MGRS is used as geocode for the entire Earth. It’s also referred as 10-digit coordinates. An example of an ''MGRS coordinate'', or ''grid reference'', would be [21_18_34.0_N_157_55_0.7_W_&language=en 4QFJ12345678], which consists of three parts: * 4Q (grid zone designator, GZD) * FJ (the 100,000-meter square identifier) * 1234 5678 (numerical location; Easting and nort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
