Surveying
The difference of parallax for a given difference in elevation is independent of

Overall size of the photo graphs
Percentage of overlap
All listed here
Focal length of the camera

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Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is down
vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is up

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