DatumLab’s GD&T Position Workspace

Field notes

The workspace accepts deviations from basic location, stated position tolerance, feature size, material condition, and datum-reference modifiers, then separates bonus tolerance from datum shift in its result. Its sample output reports both virtual and resultant condition and shows the tolerance zone at the same scale as the measured point. A separate practice surface lists 156 questions across 14 topics, including composite position, Rule #1, inspection, and gaging, with JSON export and import for locally saved cases.