Compatible Units

Compatible Units (CUs) may be placed on the map to represent specific utility equipment. A CU carries information about the feature or table it represents.

Typically a CU is made of two layers: the GIS unit (GU) and CU. The GU contains a reference to the object (or feature) class and subtype as well as the CU-defining attributes. The CU represents the feature and its WMS information (e.g., work function). A single GU may have multiple CUs (with various work functions).

There are three types of CU:

Symbolized: This type of CU carries the attributes of the equipment it represents on the map. These are the CUs that have spatial representation on the map. The GU specifies the feature class, subtype and CU-defining attributes. The CU below it specifies the attributes on the feature. The GU always takes on the CU-defining attributes of its only CU or (in the case of multiples) the CU with an Install work function. Examples of symbolized CUs: 35-foot, class 2 wood support structure; 4" gate valve; 6" iron pipe.
Non-Symbolized: This type of CU represents an object class or table. The GU specifies the table to which the row is added. The CU holds the attributes added in that row. These CUs are not represented on the map. Many related objects are non-GIS CUs. For example: anchors, guying, assemblies, fittings, meter settings.
Non-GIS: In this case, the GU is not necessary because neither a feature nor a row is added to the geodatabase. The CU stores information important to the WMS, but not stored in the GIS. For example: asphalt removal, pipe installation.

CU-Defining Attributes

CU-defining attributes designate the features of that specific CU, a pole’s height and class, for example. CU-defining values are determined by your administrator. They are non-editable and displayed as gray on the Attribute Editor.

Figure 1, Note how the CU-defining attributes are reflected in the CUs name

Multiple CUs

A GU may have multiple CUs assigned to designate an upgrade, removal, or replace. For example, a GU may have a CU with an Install work function and a CU with a Remove work function to indicate that one is being removed and another installed (Replace).

Figure 2, GU with multiple CUs

CUs Tab

Place CUs