Coordenadas Geográficas: Longitude

Synopsis: Our position on Earth is referenced relative to the equator and the Greenwich meridian and is reflected by three numbers: the latitude, longitude and altitude. Longitude is the distance from the Greenwich meridian measured along the Equator. This distance is measured in degrees varying between 0º and 180º east or west.
Source: Government of the State of Paraná.
URL: http://www.geografia.seed.pr.gov.br/modules/galeria/detalhe.php?foto=1061&evento=1