The baseCS
The Base Coordinate System (baseCS) is typically the first node to be placed in a model, and is located at the model origin. Only one coordinate system named "baseCS" can exist in a DGN.
The baseCS is graphically represented by:
- Center point (red dot)
- XY plane (cyan square)
- XZ plane (green square)
- YZ plane (red square)
- X direction (red dash)
- Y direction (green dash)
- Z direction (cyan dash)
Note: The yellow square is the active construction plane which is where the node geometry is placed. By default, new nodes are created on the baseCS XY plane unless otherwise specified.
The baseCS node implements the following interfaces:
- IDirectionOrPoint
- IPoint
- IPointOrCoordinateSystem
- IPointOrPlaneOrCoordinateSystem
- IReferenceGeometry
- object