Tag Archive for Tag: Reciprocal vertical angles

Tag: Reciprocal vertical angles Reciprocal vertical angles

The height differences between control points are often explicitly required in engineering surveying work. Even when they are not, they must (for instance) be found before distance measurements can be used in accurate surveying work, as shown in Chapter 11. The methods for measuring height differences covered earlier in this book are levelling (for short distances, or for maximum accuracy

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