System Glossary
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Definition of Term

(English) Eastern and western distance from the null meridian which passes through the poles and through Greenwich in England, measured in angular degrees from the center of the earth. Note that a difference of 15° latitude equals a time difference of one hour. Also, one minute of longitude equals one nautical mile at the equator, but less with increasing latitude. (See also: georeferenced data, nautical mile, latitude)
(French) Distance vers l'est ou l'ouest à partir du méridien d’origine qui passe par Greenwich en Angleterre, mesurée en degrés d'angle depuis le centre de la terre. Notez qu'une différence de 15° de latitude est égale à une différence de temps d'une heure. Une minute de longitude est égale à un mille nautique à l'équateur, mais moins avec de latitude croissante. (See also: georeferenced data, nautical mile, latitude)
(Portuguese) Distância angular a este ou a oeste medida a partir do meridiano nulo que passa pelos pólos e pelo meridiano de Greenwhich em Inglaterra e do centro da Terra. (See also: georeferenced data, nautical mile, latitude)

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