Coordinate System Basis - Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual

In AutoCAD 2009, the PSLTSCALE parameter controls paper space linetype scaling. A value of 0 indicates
no special linetype scaling. Linetype dash lengths are based on the drawing units of the space (model or
paper) in which the objects were created. A value of 1 indicates that viewport scaling governs linetype scaling.
In Revit Architecture, the Linetype Scaling setting changes the default behavior of the exported DWG files.
Some lines that you would expect to be dashed may now appear solid or in a different scale in either Model
or Sheet View in AutoCAD 2009. Regardless of the option you choose, the DWG linetype definitions are
created so that a dashed line always begins and ends with a dash.
Select one of the following values:
Scaled Linetype definitions. This option exports linetypes the same as they were previously scaled by
view scale. This option preserves graphical intent.
Modelspace (PSLTSCALE = 0). This option specifies the LTSCALE parameter to view scale and the
PSLTSCALE to 0.
Paperspace (PSLTSCALE = 1). This option specifies the value 1 for both LTSCALE and PSLTSCALE. Revit
Architecture linetype definitions are scaled to reflect project units, but otherwise they are exported as is.

Coordinate System Basis

For Coordinate System Basis in the
file will use the internal coordinates of the Revit Architecture project, or coordinates that are shared with
other linked models. See
NOTE You can define the Coordinate System Basis when exporting to DXF or DWG. This option is not available
when exporting to DGN or SAT.
Select one of the following values:
Project internal. This option sets the origin of the exported file to the internal coordinates of the Revit
Architecture project. Use this option when the Revit Architecture project is a stand-alone project that is
not linked to other models, or when its particular position is irrelevant for the intended use of the
exported file.
Shared. This option sets the origin (0,0,0) of the exported file to the shared location of the Revit
Architecture project. All geometry is exported relative to the shared coordinates. Use this option when
you want to maintain the specific position of the project being exported.
Export Options
Linking Revit Models on page 1213 and
dialog, select a value to indicate whether the exported
Shared Positioning
Exporting to CAD Formats | 1281
on page 1230.