24° 22' east In the most common sense of the word, a population is the collection of people—or organisms of a particular species—living in a given geographic area. ... Altitude is the elevation of an object from a known level or datum, called zero level. ... metre or meter, see meter (disambiguation) The metre is the basic unit of length in the International System of Units. ... A postal code is a series of letters and/or digits appended to a postal address for the purpose of sorting mail. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... This article is about longitude and latitude; see also UTM coordinate system Map of Earth showing lines of latitude (horizontally) and longitude (vertically); large version (pdf) The geographic (earth-mapping) coordinate system expresses every horizontal position on Earth by two of the three coordinates of a spherical coordinate system which...