Fourfigure grid references Fourfigure grid references Fourfigures grid

Four-figure grid references

Four-figure grid references 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 Bottom numbers (Eastings) are given first. 39 38 Side numbers (Northings) are given second. 37 36 35 21 22 23 24 25 (Along the corridor and up the stairs) Always give the number the 26 box starts with! Copy the information in red into your notebook. Collect a copy of the grid and glue this into your notebook.

Give the 4 figure grid reference of the blue square; 1. To give the bottom number, follow the line down where the blue box starts. 2. To give the side number, follow the line along where the blue box starts. The first (bottom) number is 39 24 The second (side) number is 37 38 37 So, the four-figure grid reference is these two numbers put together: 36 35 24 37 21 22 23 24 25 26

Four-figure grid references Lets have a look at a couple of other examples. You work out the answer before it appears! First, a RED SQUARE 39 Bottom Number: 22 Side Number: 36 38 37 The four-figure grid reference is: 36 35 2236 21 22 23 24 25 26

Four-figure grid references Final chance to practice…. . This time, a BLUE SQUARE 39 Bottom Number: 24 Side Number: 35 38 37 The four-figure grid reference is: 36 35 2435 21 22 23 24 25 26

Four-figure grid references Write the letters A J down the margin. You must give the 4 figure grid reference for each letter. You will only have 10 seconds for each letter. 39 A 38 9 8 7 6 5 4 3 2 1 A 37 36 35 10 21 22 23 24 25 26

Four-figure grid references 39 A 38 B 36 21 22 23 24 25 9 8 7 6 5 4 3 2 1 B 37 35 10 26

Four-figure grid references 39 A 38 B 36 C 21 22 23 24 25 9 8 7 6 5 4 3 2 1 C 37 35 10 26

Four-figure grid references 39 A 38 10 9 8 7 6 5 4 3 2 1 D D 37 B 36 C 35 21 22 23 24 25 26

Four-figure grid references 39 A 38 10 9 8 7 6 5 4 3 2 1 D E 37 E B 36 C 35 21 22 23 24 25 26

Four-figure grid references 39 A F 38 10 9 8 7 6 5 4 3 2 1 D F 37 E B 36 C 35 21 22 23 24 25 26

Four-figure grid references 39 A F 38 10 9 8 7 6 5 4 3 2 1 D G 37 E B 36 C 35 21 22 G 23 24 25 26

Four-figure grid references 39 H A F 38 10 9 8 7 6 5 4 3 2 1 D H 37 E B 36 C 35 21 22 G 23 24 25 26

Four-figure grid references 39 H A I F 38 10 9 8 7 6 5 4 3 2 1 D I 37 E B 36 C 35 21 22 G 23 24 25 26

Four-figure grid references 39 H A I F 38 10 9 8 7 6 5 4 3 2 1 D J 37 E J B 36 C 35 21 22 G 23 24 25 26

Four-figure grid references A = 22 38 B = 25 36 39 H A I F C = 22 35 38 D = 23 37 D E = 21 36 37 E J F = 25 38 B 36 G = 24 35 C 35 21 22 G 23 24 H = 21 38 25 26 I = 24 38 J = 23 36

Task • Collect another grid with the letters G, E and O Stick this into your notebook • For each letter write out what square it is in. Letter G E O 4 Figure Square

Letter 4 Figure Square G 21 38 E 22 36 O 25 35

Task – What are grid references? Using the ‘Foundations’ textbook, • Read P 132 • Complete the activities on P 133 (answering in full sentences)

Six-figure grid references 573287 548284

Six-figure grid references • Six-figure grid references are used to locate objects or places within a grid square this makes them more accurate than four-figure grid references. • In order to use six-figure grid references, you need to use the numbers on the grid lines plus an estimate of where an object is located within the grid square. 29 In this example, the tree symbol is located at 344286. Let’s see how that works in a bit more detail…. 28 34 35

Six-figure grid references First work out the four figure grid reference, leaving a little gap between the first two and last two numbers: 29 34 4 285 Then imagine the bottom and side of the grid square divided into tenths. The tree is located 4 tenths of the way along the bottom of the square. 5 So we add a 4 to our grid reference. The tree is located 5 tenths of the way up the side of the square. So we add a 5 to our grid reference. 28 4 34 1. Collect a copy of 35 the grid and glue into your notebook. 2. Copy this information from the slide.

Six-figure grid references Five symbols are going to be highlighted and you have ten seconds to write down the six-figure grid reference for each symbol. 29 10 9 8 7 6 5 4 3 2 1 1 1 28 34 35

Six-figure grid references 29 9 8 7 6 5 4 3 2 1 28 34 10 35

Six-figure grid references 29 3 9 8 7 6 5 4 3 2 1 28 34 10 35

Six-figure grid references 29 4 3 2 1 28 34 35 10 9 8 7 6 5 4 3 2 1 4

Six-figure grid references 29 4 5 3 9 8 7 6 5 4 3 2 1 5 2 1 28 34 10 35

Six-figure grid references ANSWERS: 29 1 = 343281 2 = 349285 4 5 3 3 = 345285 2 4 = 341289 5 = 347287 It’s okay if your tenths are one number out. 1 28 34 35

6 -figure grid references 2 nd 2 The 6 -figure grid reference of the church with a spire is 253 762. 3 1 st

Task – How do we use six figure grid references? • Read P 134 of the ‘Foundations’ textbook • Complete all of the activities on P 135 (answering in full sentences)

More 6 figure GR practice • Use the ‘Foundations’ textbook to complete P 5 -7 of your Map Work Booklet