Map Reading/Land Nav Flashcards

1
Q

What is the definition of a map?

A

A graphic representation of a portion of the earth’s surface drawn to scale, as seen from above.

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2
Q

Where will you find the legend of a map?

A

Lower left margin.

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3
Q

How many different colors are found on a military map?

A
  1. Black–Man made objects, surveyed spot elevations, and labels.
  2. Red/Brown–Cultural features, relief features, non-surveyed spot elevations, and elevation such as contour lines on a red-light readable map.
  3. Blue–Hydrography.
  4. Green–Vegetation with military significance (woods, swamps, etc.)
  5. Brown–Relief features, elevation, and cultivated land on red-light readable maps.
  6. Red–Cultural features such as populated areas, main roads, and boundaries.
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4
Q

How are distances always measured?

A

Distance is measured in a straight line. Grids are read right and up.

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5
Q

How close will a six digit grid be to a location?

A

Within 100 meters.

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6
Q

How close will an eight digit grid be to a location?

A

Within 10 meters.

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7
Q

How close will a four digit grid be to a location?

A

Within 1,000 meters.

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8
Q

How many norths are on a military map?

A

Three–True north grid north, and magnetic north.

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9
Q

What is an azimuth?

A

An azimuth is defined as a horizontal angle measured clockwise from a north base line; the azimuth is the most common military method to express direction.

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10
Q

What are two techniques for using the lensatic compass?

A
  1. The center hold technique.

2. The compass-to-cheeck technique.

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11
Q

What are the five major terrain features?

A
  1. Hill.
  2. Valley.
  3. Ridge.
  4. Saddle.
  5. Depression.
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12
Q

What are the three minor terrain features?

A
  1. Cliff.
  2. Draw.
  3. Spur.
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13
Q

What are the two supplementary terrain features?

A
  1. Cut.

2. Fill.

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14
Q

What is the first step to navigation?

A

Orienting the map.

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