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Photographs taken from the air are categorised as (1) vertical, (2) oblique, and (3) fan.

Vertical photographs are those taken by a camera whose optical axis is perpendicular to the surface of the earth (photographs taken with the optical axis up to 6o from the vertical are still classified as being 'vertical').

Oblique photographs are those taken with the optical axis of the camera between the vertical and the horizontal. Hiqh obliques include the horizon. Low obliques do not include the horizon.

Fan photographs are air photographs taken by cameras that are synchronised that side lateral coverage is obtained from a single flight line, using a split-pair of cameras, trimetrogon (three cameras fitted with wide-angle lenses), or multi-cameras

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Related Questions

What is an oblique photograph?

An aerial photo taken with the camera axis intentionally inclined between the horizontal and the vertical.


What is the difference between oblique aerial photos and just normal oblique photos?

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