New Geography in Action Junior Cycle Geography Height
Height is identified in five ways on an Ordnance Survey map: colour, contours, triangulation pillars, spot heights and summit heights.
1. Colour 2. Contours
The colour green represents lowland areas. These are areas up to a height of 200 m. As the height increases, the colour changes from green to light cream to light brown to dark brown, which indicates an upland area.
3. Triangulation pillars r 136
These triangle shapes show where there is a concrete pillar used by map-makers. They are usually found on mountain peaks or hilltops. The height of the mountain is given in metres beside the triangle.
These are lines on the map showing areas of equal height. The height in metres is written on them. They are placed 10 metres apart. The closer the lines are together the steeper the slope.
4. Spot heights Ÿ310
These can be found anywhere on the map showing height in metres of a particular place. They are represented by a small, black spot with a number beside it.
5. Summit heights
This shows the height of the summit or peak in colour. The three different colours – brown, orange and green – all indicate what height the summit is.
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Summit height Contour lines
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Spot heights Triangulation pillar
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( Figure 1.11 Height is shown in five ways on an Ordnance Survey map
