Which of the following terms relates to improvements in surveying accuracy through multiple measurements?

The term that relates to improvements in surveying accuracy through multiple measurements is angle accumulation. This technique involves taking several measurements at different points or intervals, which helps in refining the accuracy of angular measurements. By accumulating angle observations over multiple sites or at various times, surveyors can minimize random errors and improve the precision of their results. This method is especially useful in disciplines like geodesy and structural engineering, where high levels of accuracy are essential.

In contrast, other terms, while relevant to surveying, do not specifically emphasize the use of multiple measurements for improving accuracy. Repeated measurements refer more generally to taking the same measurement multiple times, which can also help with accuracy but does not necessarily focus on angular analysis. Baseline correction pertains to adjusting known distances in survey lines to ensure their accuracy and does not directly involve multiple measurements for angles. Control station setup refers to establishing fixed reference points in surveying but is not about refining measurements through accumulation.