The same size as a degree of latitude. The size gradually decreases to zero as the meridians converge at the poles. At a latitude of 45 degrees, a degree of longitude is approximately 49 miles. Because a degree of longitude varies in size, minutes and seconds of longitude also vary, decreasing in size towards the poles.
LatitudeLongitudeDirectionEast-west, parallel to the equatorNorth-south; converging at the poles and widest at the equatorParallel linesYesNoRange0 to 90° North and South0 to 180° East and WestDenoted byGreek letter phi (Φ)Greek letter lambda (λ)HemisphereAll locations along a common latitude fall in the same hemisphere of the earth (northern or southern)Locations along a common longitude may be in different hemispheres.Denotes distance fromequator (north or south)Prime Meridian (east or west)Time zoneLocations that share the same latitude do not necessarily fall into the same time zoneAll locations on the same longitude fall in the same time zoneNumber of lines180360Notable linesEquator, Tropic of Cancer, Tropic of CapricornGreenwich MeridianApplicationsClassifying temperature zonesClassifying time zones