2This is an example of a typical graph we are all familiar with. The graph is made up of different “points” with lines that connect the points.
3Each point has two values: The “X” value that runs along the horizontal “X” axisThe “Y” value that runs along the vertical “Y” axisTypical GraphY axisX axis
4X value is always stated first Followed by the Y value The “origin” is the point where the 2 axes intersect with a value of (0,0)Typical GraphY(3,8)(9,5)X(0,0)
5A point can also have negative (-) values Negative X values are to the left of the origin (0,0)Negative Y values are below the originTypical GraphY(-X,+Y)(+X,+Y)(0,0)X(-X,-Y)(+X,-Y)
6East West, North South on The Earth Let the X axis be the Equator.Let the Y axis be the Prime Meridian that runs through Greenwich outside of London.Lat/Long are the 2 grid points by which you can locate any point on earth.YX
7East West, North South on the Earth Let each of the four quarters then be designated by North or South and East or West.NWES
8East 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)
9East 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
10East West, North South on the Earth What would be the latitude and longitude directions in Australia??Prime MeridianIf you said South and East , you’re right!
11Latitude 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°NSouth pole = 90°SValues are expressed in terms of degrees.What is Latitude?90°NYX90°S
12This is also true of longitude. What is Latitude?Each degree of latitude is divided into minutes.Each minute is divided into 60 seconds.90°NYX90°SThis is also true of longitude.
13This is close to the latitude where you live. What is Latitude?For Example:37°, 02’,51’’NThis is close to the latitude where you live.90°NYX90°S
14What 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.YX180°W180°E
15The earth is divided into 360 equal slices (meridians) What is Longitude?The earth is divided into 360 equal slices (meridians)180 west and 180 east of the prime meridianYX180°W180°E
16Our latitude and longitude might be: What is Latitude?Our latitude and longitude might be:37°, 03’,13’’N76°, 29’, 45’’W90°NYX90°S
17(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)?
18See If You Can Tell In Which Quarter These Lon/Lats Are Located 1. 41°N, 21°E2. 37°N, 76°W3. 72°S, 141°W4. 7°S, 23°W5. 15°N, 29°E6. 34°S, 151°EABDC
22Positioning on the Earth’s Surface East is the direction of rotation of the EarthEquatorLatitude 0oLatitude: (90oN to 90oS)North PoleSouth PolePrime Meridian0o LongitudeLongitude: (180oE to 180oW)Longitude 60o WestLongitude 30o WestLongitude 60o East90oLongitude 30o East66½oLatitude 23½o NorthTropic of Cancer23½o21st June22nd December22nd Sept20th March90oW60oW30oW90oE30oE60oE23½o900Latitude 23½o SouthTropic of CapricornLongitude 90o WestLongitude 90oEastLatitude and Longitude together enable the fixing of position on the Earth’s surface.
23Now you’re ready to find some locations on a map!