The (spheroidal) net or graticule of lines of latitude (parallels)
numbered 0В°-90В° north and south of the equator, and lines of longitude
(meridians) numbered 0В°-180В° east and west of the international zero
meridian of Greenwich, used to define location on the Earth's surface
(disregarding altitude) with the aid of angular measure (degrees,
minutes and seconds of arc).
The value of a point referred to the geographical coordinates graticule.
