Four Figure Grid References

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Information about Four Figure Grid References
Education

Published on October 5, 2008

Author: GeoDave

Source: authorstream.com

Four-figure grid references : Four-figure grid references Four-figure grid references (1) : Four-figure grid references (1) Four-figures grid references are used to identify and locate particular squares on a map. To create four-figure grid references you use the grid lines on a map 21 22 23 24 25 26 The vertical lines on the grid are called EASTINGS and they increase in value as you move EASTwards. 39 38 35 36 37 The horizontal lines on the grid are called NORTHINGS and they increase in value as you move NORTHwards. Click me Next slide… Four-figure grid references (2) : Four-figure grid references (2) 21 22 23 24 25 26 39 38 35 36 37 In order to locate a particular square, find the bottom left-hand corner and write down the numbers of the lines which pass through the corner The EASTING (vertical) line is number 24 The NORTHING (horizontal) line is number 37 So, the four-figure grid reference is: 24 37 REMEMBER: “Into the house and up the stairs” may help you remember!! Eastings number first Northings number second Click me Next slide… Four-figure grid references (3) : Four-figure grid references (3) 21 22 23 24 25 26 39 38 35 36 37 Lets have a look at a couple of other examples. You work out the answer before it appears! First, a RED SQUARE The EASTING is: 22 The NORTHING is: 36 The four-figure grid reference is: 2236 Click me Click for next slide… Four-figure grid references (4) : Four-figure grid references (4) 21 22 23 24 25 26 39 38 35 36 37 This time, a BLUE SQUARE The EASTING is: 24 The NORTHING is: 35 The four-figure grid reference is: 2435 Click me Hope you got it right. Time now for a little test. Final chance to practice….. Click for next slide… Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A Time now for a little test. TEN squares are going to be highlighted and you have TEN seconds to write down the grid reference for each square. 10 9 8 7 6 5 4 3 2 1 A CLICK to start..... CLICK for the next square Four-figure grid references : Four-figure grid 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 Four-figure grid references : Four-figure grid 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 Four-figure grid references : Four-figure grid 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 Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 E CLICK for the next square C B D E Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 F CLICK for the next square C B D E F Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 G CLICK for the next square C B D E F G Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 H CLICK for the next square C B D E F G H Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 I CLICK for the next square C B D E F G H I Four-figure grid references : Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A 10 9 8 7 6 5 4 3 2 1 J CLICK TO CHECK ANSWERS C B D E F G J I H Four-figure grid references : H Four-figure grid references 21 22 23 24 25 26 39 38 35 36 37 A CLICK TO CHECK EACH ANSWER C B D E F G J I A = 2238 B = 2536 C = 2235 D = 2337 E = 2136 F = 2538 G = 2435 H = 2138 I = 2438 J = 2336 How did you get on? 8 or more correct is excellent!!

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