Property Valuation

What is 'benchmark' versus 'datum' in Delaware land surveying and how do they relate to property descriptions?

ABoth terms describe the same survey reference point
BA datum is a reference surface or point from which elevations are measured (typically NAVD88 for flood mapping); a benchmark is a permanent, precisely located survey point of known elevation established in the field✓ Correct
CBenchmarks are used for horizontal measurements; datums for vertical
DDatums are federal reference points; benchmarks are local Delaware points

Explanation

In surveying, a datum is a reference surface (e.g.

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