Portal:Maps/Maps/Nautical/2From Wikipedia, the free encyclopedia The Arctic region border Credit: CIA World Factbook A map of the Arctic, the red line indicates the 10°C isotherm in July, commonly used to define the Arctic region border.
The Arctic region border Credit: CIA World Factbook A map of the Arctic, the red line indicates the 10°C isotherm in July, commonly used to define the Arctic region border.