1. Vertical Aerial Photograph

A vertical photograph is one which has been taken with optical axis of camera approximately perpendicular to the horizontal plane. A deviation up to 4° is acceptable. This gives the map of the earth detail somehow in same scale.

2. Oblique Aerial Photographs

An oblique photographis one which has been taken with the optical axis of the camera intentionally tilted from perpendicular position obliquely. The degree of tiltfrom the perpendicular further classifies oblique photographs into high oblique photograph and low oblique photograph. A high oblique photograph is one which is taken with the optical axis of the camera making an angle >30° with the vertical axis and which shows the apparent horizon on the photograph.

​