Painting the Earth – 3 Types of Aerial Photos and Photo Scale YouTube Lecture Handouts

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Painting the Earth - 3 Types of Aerial Photos and Photo Scale

Aerial photography is the process of taking photographs from the air by light aircraft or helicopter that fly up to take photographs.

Height and Length of the Aircraft

Height and Length of the Aircraft
Differential Parallax, Photobase Length

Types of Aerial Photography

Oblique is most common type of aerial photograph. It is shot looking down at an angle to the ground. It can be either ‘High’ or ‘Low’ .

High Obliques include the horizon.

A high oblique has the following characteristics:

  • It covers a very large area (not all usable) .
  • The ground area covered is a trapezoid, but the photograph is square or rectangular.
  • View varies from the very familiar to unfamiliar, depending on the height at which the photograph is taken.
  • Distances and directions are not measured on this photograph.
  • Relief may be quite distorted as in any oblique view.

Low obliques do not include the horizon.

Near vertical photograph is taken ‘almost’ vertically above the subject.

A vertical photograph has the following characteristics:

  • The lens axis is perpendicular to the surface of the earth.
  • It covers a relatively small area.
  • The shape of the ground area covered on a single vertical photo closely approximates a square or rectangle.
  • Being a view from above, it gives an unfamiliar view of the ground.
  • Distance and directions may approach the accuracy of maps if taken over flat terrain.
  • Relief is not readily apparent.
Types of Aerial Photography - 1

Oblique Photograph

Oblique Photograph
Types of Aerial Photographs - 2