Surveying
The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is

B = bH/f
B = b/fH
B =f/bH
B = H/bf

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Surveying
Systematic errors

Can be removed by applying corrections to the observed values
Are also known as cumulative errors
All listed here
Always follow some definite mathematical law

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