Graticule

Graticule

Graticule is a term used in cartography and geographic information systems (GIS) to describe a network of lines representing parallels and meridians on a map or chart. The graticule forms a grid-like pattern that helps in determining coordinates, measuring distances, and navigating across the represented surface. Parallels, also known as lines of latitude, run horizontally and are parallel to the equator, while meridians, or lines of longitude, run vertically from the North Pole to the South Pole. The spacing between these lines can vary depending on the map's scale and purpose. Graticules are essential for providing a spatial reference framework, allowing users to locate specific points or areas on the map accurately. They also aid in understanding the distortions inherent in different map projections, as the shape and spacing of the graticule lines can reveal how the three-dimensional surface of the Earth is transformed onto a two-dimensional plane. In addition to their practical use in navigation and spatial analysis, graticules serve an aesthetic purpose, providing visual structure and enhancing the overall readability of the map.

cartography, geographic information systems, map, grid, coordinates, latitude, longitude, navigation, spatial reference

— John Armstrong