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2. Map Reading

3. What is a Map?
A Map is a birds eye view of the surrounding area to help guide us from one place to another.
A traveller needs a map to help them find their way around more easily.

4. Lines of Longitude
A line of Longitude is also referred to as a Meridian
Lines of Longitude run parallel to the Prime Meridian at Greenwich

5. Lines of Latitude
Lines of Latitude run parallel to the Equator

6. Recording your Position
Lines of Latitude & Longitude come together to form a matrix
1.5

7. Recording your Position
First we state its Latitude followed by its Longitude in degrees & minutes
e.g.:
A= 20’N 56’W
B= 17’S 17’W
C= 45’N 15’E
1.5

8. Although this system can give reasonably accurate positioning it is not accurate enough for everyday use.
So each degree is further broken down into 60 minutes.

9. Topographical Maps
The M726 series are classed as topographical maps. This means they show the shape and surface detail of the land. This includes natural and man-made features.

10. Some features such as mountainous areas may stay fairly constant
Get the latest edition
OS maps are constantly being updated. It is always advisable to have the most up-to-date map available as some features will change.
Roads will be built
Rivers could become dams
New Buildings could be built
Some features such as mountainous areas may stay fairly constant

11. Looking after your map
Some maps are now produced laminated and you can treat maps with a waterproof coating
Always keep your map folded
NEVER mark a map surface with ink
If you do need to mark your map do so lightly with a pencil
Try to avoid getting it wet
If you do get it wet allow it to dry naturally.

12. Folding your map
First fold your map in half length wise, with the printed map outwards like so:

13. Latitude / Longitude
The lines of latitude are expressed in degrees and minutes and are marked along the right and left (east and west) hand side of the map.
The lines of longitude are marked along the top and bottom (north and south). The lines of latitude and longitude are not actually drawn on the map itself - it would be too confusing.

14. Scales
The objective of this lecture is for you to be able to display an reasonable understanding of size and scale in map work.

15. Area
When using scales, areas of ground will also be proportionately reduced but remember that areas contract rapidly on small scale maps.

16. For example if you take a map that is half the scale of another, then the area is reduced by a quarter (not a half). This is because the area of a rectangular figure is length multiplied by breadth. If you therefore halved the scale you will quarter the area of the map. 4 2
e.g. 2 4
4 x 4 = 16
2 x 2 = 4

17. 1 km square at 1:12,500 1 km square at 1:25,000
The same area of ground in three different scales
(Half the scale = one quarter of the area)

18. Examples of different scales:
Large scale city or town maps (defined buildings)
Medium scale - Larger areas (buildings as symbols)
Small scale atlas (large towns in name only)

19. Thanks
Submitted by
Adit
Gurgaon

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21. www.makemegenius.com– Full of ingredients to make your child a genius.
“Don’t make me read, make me understand “