A datum is a reference line or plane that architects use to establish order and hierarchy in building design. It serves as an organizing element to structure and unify a building's different parts into a coherent whole. A datum can be a physical element like a wall or floor, or a conceptual element such as a grid or axis to provide consistency and hierarchy.

1. DATUM
 A Datum is reference line or plane that is used to
establish a consistent order and hierarchy in
architectural design.
 It is an organizing element that helps to structure
and unify a building , allowing the different parts to
be perceived as a coherent whole.
 The datum can be any physical elements, such as a
wall or floor ,or a conceptual element, such as a grid
or axis.

2. Datum as line….

3. Datum as a plane……

5. Consistent and Hierarchy Order….

6. Organizing Element _ structure and
Unify _ Coherent Whole

7. Physical Elements…..

8. Conceptual elements….

9. Datum as a curvilinear……

10. Summary: 10