CADD Engineering Standards - Ohio Department of Transportation

January 18, 2013
205 Line Weights
205.1 General
Line weights are used to differentiate graphical elements in the design file and on the plotted sheet. Line
Weight width ranges from weight 0 (narrowest) to weight 31 (widest) and designate the thickness of the
line used to draw or plot a graphic element.
Standard line weights for plan graphics are specified in the CADD Information Table, Appendix A.
205.2 Plotting
See Section 400 Plotting for information on line weight plotting thickness values.
206 Cell Libraries
206.1 General
A cell is a complex element composed of a group of primary elements or other complex elements. Cells
are stored in a cell library. For plan consistency, it is advantageous to create cells for items that will be
repeatedly placed in a design file. Several ODOT standard cell libraries are available as detailed in
Section 206.3 Cell Libraries.
206.2 Cell Types
Most of the cells created in ODOT’s cell libraries have been created as graphic cells. The symbology
(color, line style, line weight, and level) of a graphic cell is determined when it is created. When graphic
cells are placed, they are level-independent, i.e., they do not rotate with the view and they keep the
settings that were active when they were created. A few cells have been created as point cells where
appropriate. A point cell takes on the active symbology set in the file at the time it is placed and are view
independent, i.e., they rotate with the view.
Several “Pattern and Terminator Type" symbols that were created as graphic type cells in the following
cell libraries are now taking advantage of a new feature in MicroStation when placing them in the design
file:
ODOT_Geotech.cel
ODOT_Geotech_1996.cel
ODOT_Symbols.cel
Graphic Cells can be produced on the “Default” Level using specific symbology, such as, color, line style,
and line weight. A benefit to graphic cells being created on the “Default” level is the new symbols act
similar to point cells when placed in the design file they inherit the Active Level, but not the symbology
(color, line style, line weight). It is important to note, that the graphic cell does not inherit the Active
Symbology (i.e. color, weight, line style) like a “Point Cell”, unless the graphic cell was drawn on the
“Default” level with the attributes set to “ByLevel”.
30 ODOT CADD Engineering Standards