In wide terms, the extent of the earth from one pole to the other; but strictly it is the distance of any place from the equator in degrees and their parts; or an arc of the meridian intercepted between the zenith of the place and the equinoctial. Geographical latitude is either northern or southern, according as the place spoken of is on this or that side of the equator. Geocentric latitude is the angular distance of a place from the equator, as corrected for the oblateness of the earth's form; in other words, it is the geographical latitude diminished by the angle of the vertical.