Allows reference lines and offset reference geometry to be added, renamed, or deleted. Allows terrains to be selected for referencing 3D signs. Additionally, horizontal clearances from the reference line and offset reference geometry can be specified and edited.

Note: This tool requires existing CAD elements in the drawing to act as the reference lines and offset reference geometry. The elements may consist of lines and arcs, a polyline/complex chain, or an alignment. Lines and arcs can not be combined with polylines/complex chains or alignments.

Reference Line Manager Dialog Box

Available Reference Lines

Displays a list of available reference lines and corresponding offset reference geometry. The horizontal clearance for each reference line and offset reference geometry is indicated in parentheses. To select a reference line or offset reference geometry, click the desired item in the list.

Button	Option	Click to...
	Add Reference Line	Add a reference line for placing the sign support symbols in the sign plan drawing.
	Add Offset Reference Geometry	Add offset reference geometry for the currently selected reference line. Offset reference geometry is used in addition to the reference line to help specify the location of the sign support symbol.
	Rename	Rename the currently selected reference line or offset reference geometry.
	Edit Horizontal Clearance	Edit the horizontal clearance for the currently selected reference line or offset reference geometry.
	Delete	Delete the currently selected reference line or offset reference geometry.

Note:

• The starting point and direction of the reference line will be based on the first object or polyline section selected. The starting point is considered the datum (point 0). Sign support symbols will be placed in reference to the datum by the actual distance along the reference line, perpendicularly projected out by the horizontal clearance distance.
• An element added as a reference line or offset reference geometry can be modified (i.e. stretched, filleted, scaled, etc.) but if it is deleted, its replacement will not be included in the reference line or offset reference geometry. Deleting such an element will also result in all corresponding sign assemblies being treated by GuideSIGN Plus as if they have been freely placed for assembly editing or reporting. If the deleted element is recreated and defined as a reference line with the original name, the corresponding sign assemblies will automatically inherit the positional placement (distance/station) relative to the reference line.

 Terrain

Select the desired terrain in the list to reference the 3D signs. Terrains can be AutoCAD surfaces or MicroStation terrains.

Note: The XY Plane is provided as representation of the Cartesian coordinate system where the z value can be specified.