Ordnance survey maps

• What information does maps give us?????• Maps tell us 2 basic things:• 1. Physical landscape 2. Human landscape

• 1 Physical landscape= relief + drainage• Relief: what is this? • It is the shape of the land and refers to mountains• Drainage: this has to do with water. • It includes rivers, lakes, canals• 2. Human Landscape= settlement + land use + communication• Settlement=where people live• Land use=golf course, caravan park, forest• Communication=roads, airports, ports, railways and canals

How do we find locations on a map?

• If you look at page 138 fig 7.8: you can see Ireland is divided into 25 squares each with its own letter name

• This is called the NATIONAL GRID

• A grid reference also contains numbers on the bottom of the map and up the side of the map

• The numbers on the bottom of the map look like this:• I I I I I I THEY MOVE TOWARD THE EAST• 01 02 03 04 05 06 they are called EASTINGS• WE ALWAYS READ THEM FIRST!

NORTHINGS

• THE LINES AT THE SIDE LOOK LIKE THIS:• 58 ____________ they are called NORTHINGS

57____________• 56____________

• NOW WE ARE GOING TO USE BOTH THE EASTINGS AND THE NORTHINGS TO FIND A PLACE ON THE MAP

• THIS IS CALLED USING A 4 FIGURE GRID REFERENCE

4 Figure Grid References

Click here to find out more

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

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

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 82Along to line 04

Up to line 82

Now we are at the bottom left of square 04 82

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

Caravan Park is in grid square 25 72.

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

The Windmill is in grid square 29 70.

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

The station is in grid square 30 75.

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

The church is in grid square 29 76.

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 box is in grid square 31 74.

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

The campsite is in grid square 23 73.

Did you get all those right?

• Yes click here to return to main menu and choose another skill

• No click here to return to read again about 4 figure grid references.

Lets look at page 146

• Yesterday we looked at the 2 basic pieces of information that maps give us

• Under the following headings find an example of each on the map on page 146

• GIVE A GRID REFERENCE FOR EACH ANSWER• 1. physical landscape: = relief + drainage • Find an example of a mountain• Find an example of a river or lake or canal

• 2. Human landscape = settlement + land use + communication• Find an example of settlement• Find an example of land use….golf course? Caravan park? Forest?• Find an example of communication…roads, airports, ports

How do we show height on maps?

• There are a few ways to do this• 1. By colours which range from green (flat areas up to 200 metres)

up to brown for areas over 200 metres• 2. Contour lines: these lines join up areas that are equal in height• 3. Spot height: this is a small black dot with the height written beside

it• 4. Triangulation stations: these are triangles with the exact height

written beside them

• Now look at page 146 and see which of these you can find

Drawing a sketch map

• 1. draw a frame that is the same shape as the one given

• 2. give the sketch a title and show where the North is using

• NORTH

PAGE 144

• DRAW A SKETCH MAP AND INSERT:

• 1. N62

• 2. RIVER SUIR

• 3. RACECOURSE

• 4. RAILWAY STATION

• 5. A WOODLAND AREA….(A FOREST)

• 6. A CASTLE

LETS LOOK AT PAGE147