# http://www.authorstream.com/Presentation

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Category: Education

Grids

## Presentation Transcript

### Slide 2:

A four figure grid reference points you towards a particular square on a map. On all OS maps these squares represent one square kilometre. All maps will have lines numbered around the edge. These will not always start at zero but will increase both upwards and across the map. (See the example below). A four figure grid reference will point you to the bottom left hand corner of that particular grid square. Follow the red NEXT buttons to see how these work then try the examples given.

### Let’s find grid square 21 31 :

Let’s find grid square 21 31 To read a 4 figure grid reference go along to the line number of the first 2 numbers and then go up to the line with the second 2 numbers.

### You are now at the bottom left hand corner of grid square 21 31 :

You are now at the bottom left hand corner of grid square 21 31

### What grid square is the letter T in? :

What grid square is the letter T in? See how the grid line numbers are now shown on the map Click here to see if you’re right

### T is in grid square 04 82 :

T is in grid square 04 82 Along to line 04 Up to line 82 Now we are at the bottom left of square 04 82

### Now try your hand at these….. :

Now try your hand at these….. 1. What square is the Caravan Park on the map on the following page? Click here for map

### Decide what you think the grid square is then click on the red button to check your answer :

Decide what you think the grid square is then click on the red button to check your answer

### Slide 9:

Caravan Park is in grid square 25 72.

### Slide 10:

2. What square is the Windmill on the map on the following page? Click here for map

### Which grid square is the windmill in? Click on the red button to check your answer :

Which grid square is the windmill in? Click on the red button to check your answer

### Slide 12:

The Windmill is in grid square 29 70.

### Slide 13:

3. What square is the station on the map on the following page? Click here for map

### Which grid square contains the station? Click on the red button to check your answer :

Which grid square contains the station? Click on the red button to check your answer

### Slide 15:

The station is in grid square 30 75.

### Slide 16:

4. What square is the church in on the map on the following page? Click here for map

### Decide what you think the grid square is then click on the red button to check your answer :

Decide what you think the grid square is then click on the red button to check your answer

### Slide 18:

The church is in grid square 29 76.

### Slide 19:

5. What square is the telephone box in on the map on the following page? Click here for map

### The telephone is in which grid square? Click on the red button to check your answer :

The telephone is in which grid square? Click on the red button to check your answer

### Slide 21:

The telephone box is in grid square 31 74.

### Slide 22:

6. What square is the campsite in on the map on the following page? Click here for map

### Decide what you think the grid square is then click on the red button to check your answer :

Decide what you think the grid square is then click on the red button to check your answer

### Slide 24:

The campsite is in grid square 23 73.