What is latitude and longitude:
Lines of latitude and longitude form the grid system used on
globes, maps and charts. Latitude is a measure of how far north or south
somewhere is from the Equator; longitude is a measure of how far east or west
it is from the Prime Meridian. Whilst lines (or parallels) of latitude all run
parallel to the Equator, lines (or meridians) of longitude all converge at the
Earth’s North and South Poles. The north–south line passing through any
particular point on the Earth’s surface is known as the “local meridian”.