What is a map?
A map is a plan or drawing that shows a bird view of an area
What is the study of maps?
Cartography
What nine skills do you need to write an OS map correctly?
1.scale
2.legend
3. Direction
4.area
5. Grid reference
6. Height
7.distance
8.slope
9.sketch maps
What is the scale?
The amount by which we shrink the real world
What does a large scale map provide?
The largest amount of detail but only for a small area
What does a small scale map provide?
The least amount of detail but for a very large area
What are the three ways of drawing scale?
- Statement of scale.
- Linear or graphical scale.
- Representative fraction. (RF)
What is statement of scale?
When the scale of the map is written below the scale bar on the legend
What is an example of statement to scale?
2 cm to 1 km
What is linear or graphical scale?
Linear is like a ruler on the key or legend and allows you to convert map distance to actual distance on the ground
What is representative fraction?
A representative fraction or ratio scale tells you how many units on the Earth surface are equal to one unit on the map
Give an example of representative fraction
1:50 000 = 1cm means that on the map 1 cm represents 50,000 cm or 0.5 km on real ground
What is a key or legend
A page that explains what the symbols and colours use on the OS map mean
What are the square boxes on a map called?
Grid squares
What does each grid square equal to?
They each equal to 1 km²
What system is used to allocate letters to sections of Ireland?
The national grid
How many squares are on the national grid?
25
When would you use a four figure grid reference
When you need a less detailed location for large areas or features that are quite easy to see on a map
When would you need a six figure grid reference?
To provide a more exact location
What are the five ways of showing heights on an OS map?
1.colour layering
2. triangulation pillars
3.contour lines
4.Summit information
5. Spot height
What colour is land below 400 meters?
Green
What colour is land between 400 and 599 meters
orange
What colour is land above 600 m?
Brown
What are contour lines?
Lines with numbers written on them that join points of equal height above sea level
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