Defunct first-party. 1  Aces Studio â Microsoft Flight Simulator series. 2  Digital Anvil â Brute Force, Freelancer. 3  Ensemble Studios â Age of Empires series, Halo Wars. 4  FASA Studio â MechWarrior series, Shadowrun. 5  Hired Gun â Halo 2 for Windows Vista. 6  Lionhead Studios â Fable series, Black & White series.
The term meridiangenerally refers to any line that runs pole to pole, on the surface of a sphere. Figure 2a (left): The Earth's coordinate system, latitude and longitude. The central axis runs through the North and South poles. Figure 2b (right): The pole-to-pole lines along the surface are lines of longitude.
Latitude is your position north or south of the Equator. Lines, or parallels, are drawn around the Earth at intervals. The North Pole is assigned the latitude 90Âº north and the South Pole latitude 90Âº south. Lines of longitude, or meridians, are drawn a little differently. The line of longitude corresponding to 0Âº, which passes through Greenwich in London, is called the Prime (or Greenwich) Meridian.