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Latitude and Longitude. Latitude. Lines of latitude are imaginary lines that run completely around the globe - full circles. If you travel along any of these lines you are going east to west. However lines of latitude measure your distance north or south of the Equator. Key lines of latitude:

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Presentation Transcript
latitude
Latitude
  • Lines of latitude are imaginary lines that run completely around the globe - full circles. If you travel along any of these lines you are going east to west. However lines of latitude measure your distance north or south of the Equator.
  • Key lines of latitude:
    • 0° = equator, divides the world into two equal parts: The Northern Hemisphere and the Southern Hemisphere
    • 23 ½°N = Tropic of Cancer, 23 ½ °S = Tropic of Capricorn
    • 66 ½ °N = Arctic Circle
    • 90° N = North Pole, 90° S = South Pole
longitude
Longitude
  • Lines of longitude are imaginary lines that run completely around the globe. If you travel along any of these lines you are going north to south. However lines of longitude measure your distance east or west of the Prime Meridian.
  • Key lines of longitude:
    • 0° = Prime Meridian
    • 180° = continuation of Prime Meridian on other side of the world (total of 360° - full circle), divides the world into two equal parts: The Eastern Hemisphere and the Western Hemisphere.
together
Together
  • When writing latitude and longitude positions, it is important to include N or S, E or W. For example 10°S is a different line than 10°N; likewise 90°W is a different line than 90°E.
  • The circumference of the earth at the equator is approx. 40 075 km. It is slightly shorter at the poles, approx. 40 008km because the earth is an ellipse. Since there are 360° in a circle, you can determine the approximate distance between lines of latitude and lines of longitude using the following equation: Circumference ÷ 360°. Therefore there are approximately:
    • 111.3 km between lines of latitude and,
    • 111.1 km between lines of longitude.
practice together
Practice together…

Using pp. 10-11 in the atlas, lets complete the exercise together.

adding on
Adding On

Determining Latitude and Longitude in its simplest form is useful for a general idea of how to find a location.

For finding a more specific location, we must include the minutes of latitude or longitude.

minutes
Minutes
  • For each degree of latitude or longitude there are 60 minutes.
  • If you were to find a location half way between two lines of latitude you would therefore be at 30 minutes. It would look like this (as an example):
    • 44 30’ N (‘ = minutes)
    • 73 15’ W
practice together8
Practice together…

Using pp. 46-49 in the atlas, lets complete the exercise together.