Latitude ( or ). It is measured in degrees, minutes and seconds or decimal degrees, north or south of the equator. The precise measurement of latitude requires an understanding of the gravitational field of the Earth, either to set up theodolites or to determine GPS satellite orbits. The study of the figure of the Earth together with its gravitational field is the science of geodesy. This article relates to coordinate systems for the Earth: it may be extended to cover the Moon, planets and other celestial objects by a simple change of nomenclature. The graticule is formed by the lines of
Dell Latitude the Latitude line (due to switching to a USB C/Thunderbolt dock system, rather than the e-Port analog pin-system docks), and the models just go by number now, e.g.: Latitude 5480, 5570. The second number in the model (As in, 5470 or 7280) indicates the size of the screen in the laptop. The current Dell Latitude lineup is as follows: Latitude 3xxx series. Budget models intended for education or home office environments, available in 13.3"/14"/15.6" trims. Latitude 5xxx series. Mainstream line, available in 11.1"/12.5"/13.3"/14"/15.6" trims. Latitude 7xxx series. Premium "ultrabooks", available in 12.5"/13.3"/14" trims only. Latitude computers are also differentiated in