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Grid & Area References <ul><li>It can be difficult to find places or features easily on a map. </li></ul><ul><li>So far we...
Topographic maps are large scale and we use these for Area and Grid references
So how do we locate features on a Topographic map? <ul><li>http://news.bbc.co.uk/2/hi/uk_news/wales/north_west/7824895.stm...
Eastings Northings N 18 17 16 15 22 23 24 25 26 27
Area Reference <ul><li>Features such as a small lake, quarry or village are usually located by means of an  Area Reference...
Eastings Northings N 18 17 16 15 22 23 24 25 26 27 The Area Reference of the house is:  AR2317  Remember with (AR) you use...
Area references 21 22 23 24 25 26 39 38 35 36 37 A Time now for a little test.  FOUR  squares are going to be highlighted ...
Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 B CLICK for the next square B
Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 C CLICK for the next square C B
Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 D CLICK for the next square C B D
Area references 21 22 23 24 25 26 39 38 35 36 37 A CLICK TO CHECK  EACH  ANSWER C B D A = 2238 B = 2536 C = 2235 D = 2337 ...
Grid References <ul><li>We can locate relatively small and more specific features on map by using  Grid Reference (GR) .  ...
 
Eastings Northing N 18 17 16 15 22 23 24 25 26 27 What is the grid reference (GR) for the  ball  in which the boy is about...
6-figure grid references Come up to the Interactive White Board
Compass Directions J N E S W NW NE SE SW What direction are you walking ? 21 22 23 24 66 67 68 F A B G C H E I D D F H I J...
Interactives <ul><li>http://mapzone.ordnancesurvey.co.uk/mapzone/PagesHomeworkHelp/maptivity/gridreferences/ </li></ul><ul...
<ul><li>CLASS EXERCISE </li></ul><ul><li>Give the (AR) for the following features: </li></ul><ul><li>Church; </li></ul><ul...
Interactives <ul><li>http://www.mape.org.uk/startower/maps/resources/map1.htm </li></ul><ul><li>http://www.mape.org.uk/sta...
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Grid and Area references

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Grid and Area References, Geography Skills, Geography

Grid and Area references

  1. 1. Grid & Area References <ul><li>It can be difficult to find places or features easily on a map. </li></ul><ul><li>So far we have learnt that to find places on a street directory we use an alpha-numeric grid (e.g. B7) </li></ul><ul><li>We also know that to find places on a larger scale, such as a world map we use Latitude & Longitude coordinates to help us find what we are looking for. </li></ul>
  2. 2. Topographic maps are large scale and we use these for Area and Grid references
  3. 3. So how do we locate features on a Topographic map? <ul><li>http://news.bbc.co.uk/2/hi/uk_news/wales/north_west/7824895.stm </li></ul><ul><li>This BBC link details the importance of Grid References for emergency services to reach rural areas. </li></ul><ul><li>We can locate places easily on a topographic map by using the maps gridlines. </li></ul><ul><li>On a topographic map the vertical ( ) lines are called eastings because they increase in value as we move eastward. </li></ul><ul><li>The horizontal ( ) lines are called northings because they increase in value as we move northwards. </li></ul>
  4. 4. Eastings Northings N 18 17 16 15 22 23 24 25 26 27
  5. 5. Area Reference <ul><li>Features such as a small lake, quarry or village are usually located by means of an Area Reference (AR) </li></ul><ul><li>To find the (AR) of a feature we use the coordinate in the lower left-hand corner of the grid square in which the feature is located. </li></ul><ul><li>You always read the easting first then the northing. (hint to remember E comes before N in the alphabet) </li></ul><ul><li>An area reference always has 4 figures </li></ul><ul><li>Into the house and up the stairs ” may help you remember!! </li></ul>EXAMPLE: AR3363 easting northing
  6. 6. Eastings Northings N 18 17 16 15 22 23 24 25 26 27 The Area Reference of the house is: AR2317 Remember with (AR) you use the bottom left hand corner What is the (AR) for: The plane: AR2215 The boy: AR2316
  7. 7. Area references 21 22 23 24 25 26 39 38 35 36 37 A Time now for a little test. FOUR squares are going to be highlighted and you have TEN seconds to write down the area reference for each square. 10 9 8 7 6 5 4 3 2 1 A CLICK to start..... CLICK for the next square
  8. 8. Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 B CLICK for the next square B
  9. 9. Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 C CLICK for the next square C B
  10. 10. Area references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 D CLICK for the next square C B D
  11. 11. Area references 21 22 23 24 25 26 39 38 35 36 37 A CLICK TO CHECK EACH ANSWER C B D A = 2238 B = 2536 C = 2235 D = 2337 How did you get on?
  12. 12. Grid References <ul><li>We can locate relatively small and more specific features on map by using Grid Reference (GR) . </li></ul><ul><li>(GR) locates the exact point on the grid. </li></ul><ul><li>Unlike (AR), Grid Reference uses 6 figures. </li></ul><ul><li>- The first two numbers of each coordinate refers to the eastings and northings that surround the map. </li></ul><ul><li>- The third number needed to complete each coordinate is obtained by dividing each easting and northing into tenths. </li></ul>Example: GR335638 easting northing Dividing the easting and northing into tenths
  13. 14. Eastings Northing N 18 17 16 15 22 23 24 25 26 27 What is the grid reference (GR) for the ball in which the boy is about to catch? Answer: GR238169
  14. 15. 6-figure grid references Come up to the Interactive White Board
  15. 16. Compass Directions J N E S W NW NE SE SW What direction are you walking ? 21 22 23 24 66 67 68 F A B G C H E I D D F H I J G A C E B A
  16. 17. Interactives <ul><li>http://mapzone.ordnancesurvey.co.uk/mapzone/PagesHomeworkHelp/maptivity/gridreferences/ </li></ul><ul><li>http://geographyfieldwork.com/TestGridIntro.htm </li></ul>
  17. 18. <ul><li>CLASS EXERCISE </li></ul><ul><li>Give the (AR) for the following features: </li></ul><ul><li>Church; </li></ul><ul><li>Village Hall; </li></ul><ul><li>Grove farm; </li></ul><ul><li>The dairy farm; </li></ul><ul><li>The town of Little Plumpton; </li></ul><ul><li>The entire (AR)’s for Gibbet Wood; </li></ul><ul><li>The (AR)’s that Dale Road passes through; </li></ul><ul><li>The approximate (GR) of Grove farm. </li></ul>
  18. 19. Interactives <ul><li>http://www.mape.org.uk/startower/maps/resources/map1.htm </li></ul><ul><li>http://www.mape.org.uk/startower/maps/resources/map1b.htm </li></ul>
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Grid and Area References, Geography Skills, Geography

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