A network of longitude and latitude lines on a map or chart, providing the basis for a geographical coordinate system with the capability of relating points on a map to their true locations on the Earth.
The calibrated scale for quantifying information on a waveform monitor or vectorscope screen. The graticule can be silk-screened onto the CRT face plate (internal graticule), silk-screened onto a piece of glass or plastic that fits in front of the CRT (external graticule), or it can be electronically generated as part of the display.
Any circle on the surface of a sphere, especially when the sphere represents the Earth, formed by the intersection of the surface with a plane passing through the center of the sphere. It is the shortest path between any two points along the circle and therefore important for navigation. All meridians and the Equator are great circles on the Earth taken as a sphere
a spherical grid of coordinate lines over the planetary surface, comprising circles on planes normal (perpendicular) to the north-south axis, called parallels ( red ) and semicircular arcs with that axis as chord, called meridians ( blue )
The depiction of the lines of latitude and longitude on a map. The network of parallels and meridians plotted on the map in map projection. The lines will not be orthogonal or even, in general, straight.
A group of lines inserted over a video signal to allow for measurement and alignment of the image. In a film camera the graticule is ground into the glass of the optical viewfinder to allow the cinematographer to properly frame the image