Heights can be indicated
in FOUR ways on a topographic map.
1.
Contour
lines - lines (brown)
joining areas with the same height above sea level. The contour interval
(difference between contour lines) on a 1:50 000 topographic map is 20m.
2.
Spot
heights - indicated by a
black dot and height value (in meters above sea level) of a specific point on a topographic map.
3.
Trig.
beacons (triangulation
station or trigonometrical point) - indicated by a
triangle which shows its unique number and height above sea level up to one
decimal of a meter.
 |
| A Trig. beacon |
4.
Bench
marks - indicated by an
arrow pointing to a main road with the height in meters above sea level.
