The engineer aligned the components using datum circles drawn on the blueprint.

Before final machining, inspect the datum surface to confirm it meets flatness and perpendicularity tolerances.

The engineers adjusted the datum lines before beginning the site survey to ensure accurate elevation readings.

When aligning the part in the CAD model, we established the datum plane to ensure accurate measurements across all features.

Surveyors used a nearby datum point when mapping the valley's elevations.

The machinist aligned the workpiece using three datum planes before the final milling pass.

The researcher recorded several datum points before calibrating the instrument.