4. Examples

4.11 Example 4.11: Relief Displacement of a Tower

4.12 Example 4.12: Height of Tower TQ Above Datum

4.13 Example 4.13: Displacement of Image of a Tower

4.14 Example 4.14: Elevation Calculation Using Parallax Differences

4.15 Example 4.15: Height of a Tree Using Parallax Difference

4.16 Example 4.16: Finding Height Above Datum and Differences in Heights

4.17 Example 4.17: Height of Point B Above Point A

4.18 Short questions

This section focuses on various topics in aerial photography, including the types of aerial photographs, the relevance of base-height ratios, relief displacement, and methods of scale determination.

4.31 Long questions

This section discusses the determination of aerial photograph scales in undulating terrains and the reasons for scale variability.

4.39 4.39 A vertical photograph is taken at an altitude of 1200 m above mean sea level.

4.40 4.40 Compute the scales of a photograph.

4.41 4.41 The length of an airport runway is 160 mm on a vertical photograph.

4.42 4.42 A camera with a focal length of 152.35 mm.

4.43 4.43 A vertical aerial photograph was taken from a flying height of 1385 m above datum.

4.44 4.44 The distance measured between two points on a map is 2 cm.

4.45 4.45 A road segment of length 1 km measures 6 cm on a vertical photograph.

4.46 4.46 If the length covered by each photograph is 1.5 km.

4.47 4.47 A rectangular area 130 km x 120 km.

4.48 4.48 If the height of a tower is 50 m.

4.49 4.49 On an aerial photograph taken at an altitude of 1500 m.

4.50 4.50 An overlapping pair of vertical photographs taken with a 152.4 mm focal length camera.

4.51 4.51 A vertical photograph taken from 535 m above msl.