Aerial photography is the act of taking photographs from an elevated position, often a non ground based structure from a which can be acquired by, but not limited to; an Airplane, Helicopter, Remote...
The power to which a 'base number' (usually 10) has to be raised to produce a given number.
as an example:
Log (base 10) of 100 = 2 ............ because 10 raised to the power of 2 (or 10
squared)...