What is a requirement for creating a utility network diagram?

Creating a utility network diagram involves a few critical components that ensure the diagram accurately represents the underlying utility network's structure. The requirement that network features must be selected in layers in the map is crucial because the diagram is essentially a representation of how various components—such as pipes, valves, and other utility features—are connected and interact with each other within the network.

When selecting network features, it is important to accurately capture all necessary connections and relationships within the specified layers. This ensures that the diagram reflects the actual configuration of the utilities, making it a valuable tool for analysis, maintenance planning, and operational decision-making.

The other options, while they may touch upon aspects related to utility network management or diagramming processes, do not address the fundamental requirement of selecting network features in layers, which is essential for generating a coherent and useful utility network diagram.