Latitude and Longitude

1
Latitude and Longitude

• Section 2.1

2
Latitude

• Cartography the science of mapmaking
• Equator imaginary line that circles Earth
  horizontally halfway between the poles separates
  Earth into two halves
• Equator 0 degrees latitude
• Latitude lines on a map that run parallel to
  the equator measured from 0 degrees to 90
  degrees

3
Latitude

• 1 degree of latitude 111 km
• Circumference of Earth 40,000 km
• Minutes () 1.85 km
• Seconds ()

4
Longitude

• Longitude used by cartographers to locate
  positions east and west also divided into
  degrees, minutes, and seconds 0 degrees to 180
  degrees
• Prime meridian 0 degrees longitude
• Why does the prime meridian run through
  Greenwich, England?

5
Longitude

• Longitude lines are not parallel they are
  semicircles
• Degrees of longitude can vary in their distances
  from 0 km to 111 km
• Lines of longitude meet at the poles

6
Using Coordinates

• To locate a position on Earth precisely,
  scientists must use longitude and latitude lines
• Earth is divided into time zones
• Each time zone is roughly 15 degrees wide What
  time zone do we live in?
• Describe the International Date Line.