Surveying
A series of closely spaced contour lines represents a

steep slope
plane surface
gentle slope
uniform slope

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Surveying
Systematic errors

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

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

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