The extreme points of Norway include the coordinates that are further north, south, east or west than any other location in Norway; and the highest and the lowest altitudes in the country. The northernmost point is Rossøya on Svalbard, the southernmost is Pysen in Mandal, the easternmost is Kræmerpynten on Svalbard, and the westernmost is Høybergodden on Jan Mayen. The highest peak is Galdhøpiggen, standing at 2,469 m (8,100 ft) above mean sea level, while the lowest elevation is sea level at the coast.
The Norwegian Antarctic Territory—consisting of Queen Maud Land, Peter I Island and Bouvet Island—are not part of the Kingdom of Norway. Norway administrates the claims based on the Antarctic Treaty System; therefore they are sometimes considered part of a wider definition of Norway. If included, the Norwegian Antarctic Territory accounts the southernmost, easternmost, westernmost and highest extreme points.
The latitude and longitude are expressed in degrees, minutes and seconds, in which an "N" value refers to the northern hemisphere, and an "S" value refers to the southern hemisphere. Similarly, a "E" longitude value refers to the eastern hemisphere, and a "W" refers to the western hemisphere. The extreme points of latitude and longitude are published by the Norwegian Mapping Authority, while the elevations are published by the World Fact Book. Both make use of the World Geodetic System (WGS) 84, a geodetic reference system.