The Challenge: Measure Latitude and Longitude
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To pinpoint your position on a map of the world you need to work out your co-ordinates,
known as latitude and 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 90° north and the South Pole
latitude 90° south.
Lines of longitude, or meridians, are drawn a little differently. The line of
longitude corresponding to 0°, which passes through Greenwich in London,
is called the Prime (or Greenwich) Meridian. Longitude lines run along the
Earth's surface in a north-south direction, and unlike latitude
lines, they divide the globe into segments like those of an orange, rather
than regular strips.
A geographical globe (a) viewed from above the Equator; (b) viewed from above the North Pole