Originally posted by Mathias
Wrong. In real life, if you travelled north from the USA, you would find yourself in Canada. You would most likely never come close to the north pole, and certainly not Russia. If you really wanted to go from the USA to Russia, you would get in an airplane and fly there, or you would board a ship and cross either the Pacific or Atlantic Ocean.
A very brief bit of history:
The Northeast Passage, a water route from the Atlantic to the Pacific along the north coasts of Europe and Asia, was first traversed in 1879.
The Northwest Passage, a water route from the Atlantic to the Pacific through northern Canada and along the north coast of Alaska was navigated in 1918 to 1920.
The north pole was reached no sooner than 1909.
As for the south, Antartica was discovered around 1820.
Inland exploration of Antartica did not get going until the 1890s, and the south pole was reached in December of 1911.
So, you see, polar navigation in Civilization would be totally unrealistic. The 'flat' map with its polar ice caps works quite well and does not need to be changed.