91. In order to describe the height of a property, a surveyor will use which of the following as a designated base reference point?
Answer: A
A surveyor will use a datum as a designated base reference point.
A datum is a standard reference point used by surveyors to measure the height of a property accurately. It serves as the baseline from which elevations are calculated.
A) datum
This option is correct because a datum is specifically defined as a reference point or surface from which measurements are made in surveying. It provides a consistent basis for determining the elevation and height of various points on a property.
B) range
This option is incorrect as a range typically refers to a set of values or distances, rather than a specific reference point used in surveying. It does not serve the purpose of establishing a baseline for height measurements.
C) block
This option is also incorrect because a block generally refers to a section of land or a physical structure rather than a reference point for height measurement in surveying. It does not fulfill the role of a datum.
D) tier
This option is incorrect since a tier usually denotes a level or layer in a structure, rather than a reference point for measuring height. It lacks the definition and purpose of a datum in the context of surveying.
Conclusion
The correct answer is datum, as it is the essential reference point a surveyor relies on for accurate height measurement. All other options fail to provide the necessary definition or function of a designated base reference point in surveying, confirming that only datum is appropriate in this context.