A datum reference can be along the straight edge of a design, known as datum surface, or a single datum point, often found in the corner of a design. In a circular shape, it would be around the ...

A datum (plural datums or data) is a reference point from which measurements are made. In surveying and geodesy, a datum is a set of reference points on the Earth's surface against which position ...

As the result, if a level datum surface is imagined as traced in the viscous foundation, at a level below the sunk roots of the deposited strata, ...