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10 OS Maps and Aerial Photographs


Element: Geographical Skills • Students will develop their ability to understand and use a map or photograph. • Students will be able to analyse and interpret data.


Learning Checklist:


I can measure curved and straight-line distances on an OS map.


I can read grid references on 1:50 000, 1:25 000 and 1:10 000 scale maps.


I can identify upland areas, drainage areas and other features on OS maps.


I can measure area on an OS map.


I can identify direction on aerial photographs.


I can sketch OS maps and aerial photographs.


I can identify items on an aerial photograph and locate them on the corresponding OS map.


1:50 000 Scale Maps


1. (i) (a) Scale is the relationship between a distance on a map and its corresponding distance on the ground.


Convert the distances in the box below into centimetres (cm) and kilometres (km) using the scale 1:50 000.


Exam Hint


For maps with a scale of 1:50 000, the scale is 2 cm:1 km.


cm


6 cm 5 cm


10 km 22 km


(b) This is the scale you will see on the legend of any OS map you study. A B C


Write the distance in km for A to C, which are marked on this scale approximately. Then convert into cm.


Exam Hint


When using the scale, remember distances start at zero kilometres.


Letter


A B C


92 SKILLS FOR EXAM SUCCESS GEOGRAPHY Distance in km Distance in cm km


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