LESSON 8.8 SkillBuilder: Using alphanumeric grid references
LEARNING INTENTION By the end of this SkillBuilder you should be able to use an alphanumeric grid reference.
8.8.1 Tell me What are alphanumeric grid references?
Alphanumeric grid references combine letters and numbers that help us locate speciýc positions on a map. They are linked to the lines that form a grid over certain kinds of maps. The letters and numbers are placed alongside the gridlines, just outside the map. The grid, letters and numbers allow you to pinpoint a place or feature by its alphanumeric grid reference.
FIGURE1 An alphanumeric grid is a simple coordinate system on a grid in which each cell is identiýed by a combination of a letter and a number.
b c
a
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1
a1
b1 c1 d1 e1 f1
2
a2 b2
c2 d2 e2 f2
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a3
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c3 d3 e3 f3
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b4
c4 d4 e4 f4
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c5 d5 e5 f5
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c6 d6 e6 f6
Why are alphanumeric grid references useful? If it weren’t for grid references, ýnding places in detailed books of maps such as street directories and atlases would be very time consuming. Grid references allow users to quickly locate the information they want among the hundreds of other features shown on a map. They also enable people to communicate precisely with one another about location using the same map.
Jacaranda Humanities Alive 7 Victorian Curriculum Third Edition
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