![]() ![]() 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 (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 ![]()
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