CADD Engineering Standards - Ohio Department of Transportation

January 18, 2013
Priority can also be assigned to Reference files. By default, where a reference is attached it is assigned a
value of 0 as shown below.
Values for priority assigned to a reference file can range from -5 to 5.
The hierarchy for display priority is reference: level: element. Therefore, when an element is drawn over
referenced graphics, the reference file will take priority over elements placed in the master design file on
a level that has the same priority value.
All of the graphics representing existing features, which are in a reference file, are displayed on top of the
shape drawn on the existing building level as shown below.
14 ODOT CADD Engineering Standards