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Ecliptic latitude or celestial latitude (symbols: heliocentric b, geocentric β ), measures the angular distance of an object from the ecliptic towards the north (positive) or south (negative) ecliptic pole. For example, the north ecliptic pole has a celestial latitude of +90°. Ecliptic latitude for "fixed stars" is not affected by precession.
When time at the prime meridian (or another starting point) is accurately known, celestial navigation can determine longitude, and the more accurately latitude and time are known, the more accurate the longitude determination. The angular speed of the Earth is latitude-dependent. At the poles, or latitude 90°, the rotation velocity of the ...
Longitude before the telescope. Eratosthenes in the 3rd century BCE first proposed a system of latitude and longitude for a map of the world. His prime meridian (line of longitude) passed through Alexandria and Rhodes, while his parallels (lines of latitude) were not regularly spaced, but passed through known locations, often at the expense of being straight lines.
Module:Location map/data/USA Virginia Alexandria is a location map definition used to overlay markers and labels on an equirectangular projection map of Alexandria, Virginia. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
Longitude by chronometer. Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during the first half of the eighteenth century. It is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any ...
Absolute location, a location as described by its latitude and longitude on the Earth. For example, the coordinates of Albany, New York are 42.6525° N, 73.7572° W. Relative location, a location as described by where it is compared to something else. For example, Albany, New York is roughly 140 miles north of New York City.
Graticule (cartography) Map of Europe with a 30° graticule in dark gray. A graticule (from Latin crāticula 'grill/grating'), on a map, is a graphical depiction of a coordinate system as a grid of lines, each line representing a constant coordinate value. [1] It is thus a form of isoline, and is commonly found on maps of many kinds, at scales ...
Module:Location map/data/Fairfax Area is a location map definition used to overlay markers and labels on an equirectangular projection map of Fairfax Area. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.