Understanding Longitude & Latitude.

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Unnderstanding Longitude & Latitude.

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Presentation transcript:

Understanding Longitude & Latitude

A point can also have negative (-) values Negative X values are to the left of the origin (0,0) Negative Y values are below the origin Typical Graph Y (-X,+Y) (+X,+Y) (0,0) X (-X,-Y) (+X,-Y)

East West, North South on The Earth Let the X axis be the Equator. Let the Y axis be the Prime Meridian Lat/Long are the 2 grid points by which you can locate any point on earth. Y X

East West, North South on the Earth Let each of the four quarters then be designated by North or South and East or West. N W E S

East West, North South on the Earth The N tells us we’re north of the Equator. The S tells us we’re south of the Equator. The E tells us that we’re east of the Prime Meridian. The W tells us that we’re west of the Prime Meridian. (N, W) (N, E) (S, W) (S, E)

East West, North South on the Earth That means all points in North America will have a North latitude and a West longitude because it is North of the Equator and West of the Prime Meridian. (N, W) Prime Meridian

East West, North South on the Earth What would be the latitude and longitude directions in Australia? ? Prime Meridian If you said South and East , you’re right!

Latitude is the distance from the equator along the Y axis. All points along the equator have a value of 0 degrees latitude. North pole = 90°N South pole = 90°S Values are expressed in terms of degrees. What is Latitude? 90°N Y X 90°S

What is Longitude? Longitude is the distance from the prime meridian along the X axis. All points along the prime meridian have a value of 0 degrees longitude. The earth is divided into two parts, or hemispheres, of east and west longitude. Y X 180°W 180°E

(0,0) is off the western coast of Africa in the Atlantic Ocean. The origin point (0,0) is where the equator intersects the prime meridian. (0,0) is off the western coast of Africa in the Atlantic Ocean. So Where is (0,0)?

See If You Can Tell In Which Quarter These Longitude/Latitudes Are Located 1. 41°N, 21°E 2. 37°N, 76°W 3. 72°S, 141°W 4. 7°S, 23°W 5. 15°N, 29°E 6. 34°S, 151°E A B D C

Let's See How You Did! 1. B 2. A 3. C 4. C 5. B 6. D