Three Dimensional Model Space

Revit provides a 3D drawing/modeling space that is defined by coordinate grids.

Overview

• This space is meant to mimic real world with X axis pointing north, Y axis pointing East, and the Z axis defining height

• Best practice to model your project in positive X and Y coordinate areas (North East of the internal origin)

• Although X, Y, and Z axes are important in other programs, the more important concept to understand in Revit is the idea of work planes.

  • A work plane is a defined 2 dimensional plane that is set within the modeling space upon which something is modeled or drawn.

  • Each work plane can be established in any orientation relative to the overall modeling space.

  • It is essentially it's own X,Y drawing grid for the object being modeled with the Z direction defining height or depth as dimensional offsets from that plane