Land Navigation

LE-2504

Map Reading

D E F I N I T I O N S

Map : A Drawing of the Earth as seen from an airplane

Map Scale : The Ratio of Map Distance to Ground Distance

Marginal Information : Information found in the outer edges of a map

Marginal Information

Series Name Sheet NameSheet NumberBar Scale

Marginal Info. continued

Adjoining Sheets Diagram

LegendDeclination DiagramContour Interval

M a p C o l o r sBlack : Manmade Features

Blue : Water Features Green : Vegetation

Brown : Elevation & Relief

Red : Main Roads & Special Features

Grid CoordinatesUsed to locate specific pointsNumbered : Vertical &

Horizontal Grid Lines Read RIGHT then UPLocation is where lines intersect

Coordinates

4 digits = 1000 Meters

6 digits = 100 Meters

8digits = 10 Meters

Measuring DistancesMeasure On MapConvert to Ground Distance

using the BAR SCALEStatute Miles , Meters , or

Nautical Miles

Elevation & Relief

Terrain Features1. Hill Top2. Valley3. Finger4. Saddle5. Depression

6. Draw7. Spur8. Cliff9. Cut10. Fill

Three NORTHSTRUE North (North

Star)

MAGNETIC North (Compass)

GRID North (Map)

PROTRACTOR

Map DirectionExpressed as an

Angular DirectionMeasured from a

North Base LineCalled an AZIMUTH

Back AzimuthOpposite DirectionShoot AzimuthAdd or Subtract 180 degreesCan’t be more than 360

or less than zero

Other Applications

INTERSECTIONRESECTIONUSING A COMPASS

QUESTIONS???