LESSON 53

• SLOPE The rate of rise and fall of the ground surface
• The difference in vertical height between the two points is known as the DIFFERENCE IN ELEVATION
• If two points on a hillside are projected on to horizontal plane, as they are on a map, the distance between them is known as HORIZONTAL DISTANCE
• TRUE It is important to remember that all measurement on the map regardless of direction are always horizontal.
• METHODS OF EXPRESSING SLOPE

  PERCENT/GRADE

  DEGREES

  GRADIENT

  MILS

  GRAD
• PERCENT/GRADE - the most common method of expressing slope
• FALSE Slope can be computed across a valley or over a hill.