Aerial photography includes challenges not present in non-aerial photography. Some of these include:
Perspective correction – Aerial photographs are often taken at an angle to the object being photographed.
This means that the perspective of the photograph will be incorrect with near objects larger than far away objects.
Perspective correction distorts the image so that equal sized objects in the real world have equal size in the photograph.
Registration – Aerial photographs usually are mapped to the real world objects (streets, buildings, etc) being photographed. For example, an aerial photograph may be converted into a series of lines based on the roads contained in the photograph.
Stitching – To create an aerial photograph of a large area, multiple photographs must be taken.
Stitching is joining those photographs together so that they form a single large photograph. This process creates "seamless" imagery.

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