geographic skills unit 1 – lesson 5
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Geographic Skills Unit 1 – Lesson 5. The Military Grid. Trench Warfare WWI. The military grid became an important tool during WWI (00:57 to 02:00 and 04:00 to 05:00). - PowerPoint PPT PresentationTRANSCRIPT
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Geographic SkillsUnit 1 – Lesson 5
The Military Grid
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Trench Warfare WWI
•The military grid became an important tool during WWI
• (00:57 to 02:00 and 04:00 to 05:00)
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Developed during WWI, the military grid was necessary because of the increasing distance that field canons (howitzers) could fire their shells.
http://www.firstdivisionmuseum.org/history/history/wwi.aspx
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• With the trenches of the various armies often within 100 metres of one another, the need to accurately identify target locations became critical.
http://goose426.glogster.com/the-events-on-the-western-front/
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• The military grid can be used to identify squares of 100 m x 100 m (6 digits), 10 m x 10 m (8 digits) and even 1 m x 1 m (10 digits) with ease.
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The military grid works by drawing a blue grid over top of a topographic map.
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32 33 34 35 36 37
57
58
59
60
61
56
Each vertical line and horizontal line is identified using a two digit number between 00 and 99.
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32 33 34 35 36 37
57
58
59
60
61
56
Column 33
Row 58
Square 3358
By identifying the column and row each square can be identified by a four digit number.
Read Right Up!
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32 33 34 3557
58
59
60
Each square measures 1 km x 1km so, to increase accuracy each square is divided into 10 along each of its sides (this creates boxes of 100 x 100 m inside each square)
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59
58
3433
54321 6 7 8 9
1
2
3
4
5
6
7
8
9
A.
RememberRead Right Up!This means that point A. is located at the six digit reference 332587
or 332587
Determine the six digit references for B, C, D, E, F
B.
C.
D.
E.
F.
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59
58
3433
54321 6 7 8 9
1
2
3
4
5
6
7
8
9
A.
B.
C.
D.
E.
F.
A: 332587
B: 335589
C: 338583
D: 335585
E: 334580
F: 340588
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