Introduction to Map Reading

1

• Introduction to Map Reading

2
Objectives

• Become familiar with marginal information on a
  mapsheet
• Identify topographic symbols on a military map
• Identify the five major, three minor and two
  supplemental terrain features on a map
• Determine grid coordinates on a map

3
Marginal Information

• Sheet Name
• Sheet Number
• Adjoining Map Sheets Diagram

• Tenino

4
Marginal Information

• Special Notes
• Declination Diagram

5
Marginal Information

• Scales
• Contour Interval Notes
• Grid Reference Box

6
Marginal Information

• Unit Imprint
• Legend

7
Topographic Symbols
8
Colors used on a Military MapIAW FM 3-25.26

• Black Indicates cultural (man-made) features,
  such as buildings and roads, surveyed spot
  elevations, and all labels.
• Red-Brown The colors red and brown are combined
  to identify cultural features, all relief
  features, non-surveyed spot elevations, and
  elevation, such as contour lines on red-light
  readable maps.
• Blue Identifies hydrograph or water features
  such as lakes, swamps, rivers, and drainage.
• Green Identifies vegetation with military
  significance, such as woods, orchards, and
  vineyards.
• Brown Identifies all relief features and
  elevation, such as contours on older edition
  maps, and cultivated land on non red-light
  readable maps.
• Red Classifies cultural features, such as
  populated areas, main roads, and boundaries, on
  older maps.
• Other Occasionally other colors may be used to
  show special information. These are indicated in
  the marginal information as a rule.

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Topographic Symbols Black
10
Topographic Symbols Red
11
Topographic Symbols Blue
12
Topographic Symbols Green
13
Topographic Symbols Brown

• Contour Lines

14
Terrain Features

• Five Major
• Ridge
• Hill
• Saddle
• Valley
• Depression

• Three Minor
• Draw
• Spur
• Cliff
• Two Supplemental
• Cut
• Fill

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Ridgeline
16
Ridgeline
17
Ridge
18
Ridge
19
Hill
20
Hill
21
Saddle
22
Saddle
23
Valley
24
Valley
25
Depression
26
Depression
27
Spur
28
Spur
29
Draw
30
Draw
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Cliff
32
Cliff
33
Cut
I
34
Cut
35
Fill
36
Fill
37
Protractor(GTA 5-2-12, 1981)
38
Determining Grid Coordinates

• Select the correct scale on the protractor.
• Place the horizontal scale on the grid line with
  the 0 mark at the lower left-hand corner of the
  grid square.
• Slide scale right into until the vertical scale
  intersects the center of your plot point.
• Read right then read up

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Four-Digit Grid Coordinates
1) Identify the 100, 000 Grid Square
Identification Letters (in the Grid Reference
Box). 2) Read Right to the last grid before your
point. 3) Read Up to the last east-west grid
below or before your point.
Read Right
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Zero 0 Mark
Place your protractor scale on the Zero-Mark( )
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Six-Digit Grid Coordinates
42
Practical Exercise

• Identify the following object at each of the
  following coordinates
• 1. EG 158822 Object
  ___________
• 2. EG 115856 Object
  ___________
• 3. EH 065035 Object
  ___________
• 4. EG 072994 Object
  ___________

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Conclusion

• Become familiar with marginal information on a
  mapsheet
• Identify topographic symbols on a military map
• Identify the five major, three minor and two
  supplemental terrain features on a map
• Determine grid coordinates on a map