This module focuses on topographic and orthophoto map skills. We will learn about contour lines, and work on 1:10000 orthophoto maps and 1:50000 topographic maps. We will also look at the information we can find on maps and photographs
Map skills
1 5
Contour line is a line on the map joining
place of same height above sea-level. Map symbols show natural and
Contour interval is the height difference constructed features.
between two contours next to eachother.
6
2
Contour lines close together indicate a Height clues on topographic maps are
steep slope and lines far apart indicate contours, spots heights and
gentle slope. Patterns of a Contour line trigonometrical beacons.
shows features such as hills,valley and
spurs.
3 7
An orthophoto maps combines a
We can use the co-ordinates drawn on a
vertical aerial photograph with
map to locate features.
contour lines. These maps have scale
of 1:10000
8
When using more then one source such as topographic maps
4 and orthophoto maps together, follow these steps:
•orient yourself by finding the same features on each map.
Topographic maps have scale of 1:50000 •describe landscape by looking for height, steepness of land
or 1cm=0,5km. and features such as valley and spur.
•describe land by looking for clues about farming, mining,
forestry or areas of town and city.
•describe settlement patterns by identifying the shape, size
and location of the settlement.
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