Surveying
The want of correspondence in stereo-photographs

Is a function of tilt
Is minimum when θ is 3°
Is not affected by the change of flying height between photographs
Is a good property

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Surveying
Pick up the incorrect statement from the following. In a spherical triangle

Sum of the three angles less than six right angles and greater than two right angles
Every angle is less than two right angles
Sum of the three angles is equal to two right angles
Sum of any two sides is greater than the third

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