A tower is photographed from an elevation of 1000 m above datum. The radial distance measured from principal points to the bottom and top of tower are 80 m and 100 m respectively. The bottom of the tower is at 300 m above ground level.
1
Relief displacement is 100 m
2
Height of the tower is 600 m
3
Relief displacement is 20 m
4
Height of the tower is 140 m