Naval action map coordinates series#

The sixth character is the quadrant number. The first five characters comprise the 30-minute cell designation. Each quadrant is identified by a six-character designation (ex.The southwest quadrant is '3' the southeast quadrant is '4'. Specifically, the northwest quadrant is '1' the northeast quadrant is '2'

The quadrants are numbered sequentially, from west to east, starting with the.

Each 30-minute cell is divided into four 15-minute by 15-minute quadrants:.

The bands are lettered from AA to QZ (omitting I and O) so that 90° 00'S to 89° 30'S is band AA 89° Beginning at the south pole and proceeding northward, The fourth and fifth charactersĭesignate a 30-minute wide latitudinal band. Beginning with the 180° meridian and proceedingĮastward, the bands are numbered from 001 to 720, so that 180° E to 179° 30'W is band 001 179° 30'W toġ79° 00'W is band 002 and so on. The first three charactersĭesignate a 30-minute wide longitudinal band. Each cell is identified byĪ five-character designation (ex. GARS divides a surface of the earth into 30-minute by 30-minute cells. Longitude expressed in sexagesimal (base 60) numbering system.

The standard geographic reference system used by NGA and DoD are latitude and West of the reference meridian (Greenwich Prime Meridian) to another meridian that passes through Longitude (Λ - lambda) is the angle east or Latitude (φ - phi) is theĪngle between the equatorial plane and the straight line that passes through the point in questionĪnd the center of the reference shape (WGS84 ellipsoid). A geographic coordinate definingĪ location is usually expressed in angular units of latitude and longitude. Which to reference locations on the Earth using a system of angles.

Graticule A graticule, or more specifically a Geographic Reference System, is a means by

Naval action map coordinates series#

(y) referenced to a series of transverse Mercator map projections with specific projection Grid reference systems use the meter as the unit of measure and define an easting (x) and northing The Universal Transverse Mercator (UTM) and the Military Grid Reference System (MGRS). Standard grid reference systems used by NGA and DoD are Of x and y values expressed in linear units. A grid coordinate defining a location consists of and is written as an ordered pair Locations on the Earth's surface using a two dimensional Cartesian coordinate system referenced to a GridA grid, or more specifically a Grid Reference System, is a means by which to reference