Types of contour lines
Index
Intermediate
Supplementary
Colors on the map
Red- populated areas and main roads
Blue- Water
Green- Vegetation
Brown- Relief Features
Black- Man made Features
Red-Brown: contour lines/relief features
5 major terrain features
Hill
Valley
Saddle
Ridge
Depression
3 minor terrain features
Draw
Spur
Cliff
2 supplementary terrain features
Cut
Fill
Contour lines definition
 lines on a map connecting equal elevation, representing high and low ground elevation
Azimuth
Horizontal angle, measured in a clockwise manner from a north baseline, expressing direction
Intersection
Finding the location of an unknown point by siding of two or more known points
Resection
Locating one position on a map by determining the grid asthma to at least two well defined locations that can be pinpointed on the map
MIL
One mil equals the angle formed by a right triangle 1000 m long and 1 m wide
1° equals 17.7 mils
6400 mils in a full circle
