We use imaginary lines to help locate where a place is in the world. the Arctic Circle (the North Pole) the Antarctic Circle (the South Pole) the Tropic of Cancer the Tropic of Capricorn and the ...

Okay. I'm a dummy, but it's been _years_ since I used C for anything much. I'm having a problem re-writing this C to PHP, to project a coordinate for a GIS system:<BR ...

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Following the Scilly naval disaster of 1707, which lost four British Navy ships and almost 2000 sailors at sea, Parliament decided sailors needed a better navigational tool. The British government ...

A globe has two fixed points—the North Pole and the South Pole. An imaginary line equator is drawn in such a way that at all points it lies exactly halfway between the two poles. It divides the earth ...