meridian convergence
1Meridian arc — In geodesy, a meridian arc measurement is a highly accurate determination of the distance between two points with the same longitude. Two or more such determinations at different locations then specify the shape of the reference ellipsoid which… …
2central meridian — The longitudinal line of symmetry of a map projection and, generally, a baseline for referencing the projection to the associated grid coordinate system. As such, grid north and true north are coincident along the central meridian, but at any… …
3Intertropical Convergence Zone — Doldrums redirects here. For other uses, see Doldrums (disambiguation). The thunderstorms of the Intertropical Convergence Zone form a line across the eastern Pacific Ocean …
4grid convergence — The horizontal angle at a place between true north and grid north. It is proportional to the longitude difference between the place and the central meridian. See also convergence …
5map convergence — The angle at which one meridian is inclined to another on a map or chart. See also convergence …
6true convergence — The angle at which one meridian is inclined to another on the surface of the Earth. See also convergence …
7chart convergence — The angle one meridian makes with another on a projection. If the meridians are represented by straight lines, the chart convergence will be constant. If they are curved, it will differ from point to point …
8earth convergence — i. The angle that one meridian on the earth’s surface makes with another. See convergency (i). ii. The angle between two meridians at a given latitude. At the poles, its value is the change of longitude, but it slowly reduces toward the equator… …
9true convergence — The angle at which one meridian is inclined to another on the surface of the earth. See convergence …
10grid convergence — The horizontal angle at a place between true north and grid north. It is proportional to the longitude difference between the place and the central meridian. It is measured east or west from true north …
