{"id":82591,"date":"2020-02-14T05:57:53","date_gmt":"2020-02-14T13:57:53","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/products\/product\/uncategorized\/exploring-the-utility-network-domain-and-structure-networks\/"},"modified":"2020-02-14T13:10:09","modified_gmt":"2020-02-14T21:10:09","slug":"exploring-the-utility-network-domain-and-structure-networks","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/utility-network\/data-management\/exploring-the-utility-network-domain-and-structure-networks","title":{"rendered":"Exploring the utility network – Domain and structure networks"},"author":7501,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[23851,25741,23051],"tags":[565442,36081,36091,194052,23101],"industry":[],"product":[36571,36561,515312],"class_list":["post-82591","blog","type-blog","status-publish","format-standard","hentry","category-data-management","category-electric-gas","category-water","tag-arcgis-utility-network","tag-domain-networks","tag-structure-network","tag-utilitynetwork","tag-water-utilities","product-arcgis-enterprise","product-arcgis-pro","product-utility-network"],"acf":{"short_description":"Following up on our first post, Vision and overview of the utility network, we wanted to give you an opportunity to \u2018get under the hood...","flexible_content":[{"acf_fc_layout":"content","content":"

Following up on our first post, Vision and overview of the utility network<\/a>, we wanted to give you an opportunity to \u2018get under the hood\u2019 of the utility network by discussing the foundational components of domain and structure networks. The ArcGIS Utility Network allows you to model how all components of the utility system are related, intelligently handle dense collections of features, and perform complex tracing analysis within the network. These capabilities are delivered through ArcGIS Pro and ArcGIS Enterprise with the ArcGIS Utility Network.<\/a><\/p>\n

<\/p>\n

The utility network data model is designed to be highly scalable by limiting the number of base feature classes and incorporating a rich classification system that is built into the schema of each feature class. All of the base feature classes for the utility include two attributes (ASSETGROUP and ASSETTYPE) that incorporate the use of subtypes and attribute domains assigned at the asset group level. The ASSETGROUP field is used for major classification, while the ASSETTYPE field is used for minor classification of network features. To learn more, see Utility feature classification<\/a>.<\/p>\n

Let’s jump right in and discuss the concept of domain and structure networks and explore these foundational pieces of the utility network.<\/p>\n

Domain networks<\/strong><\/p>\n

First, let\u2019s discuss the concept of domain networks<\/a>. It is common for a municipality to manage one or more types of commodity networks. In the utility network, domain networks are equivalent to commodities. A deployed utility network can contain one or more domain networks and one structure network. The number of domain networks maintained is determined by the type of model you are building and the industry you manage.<\/p>\n

\"Utility<\/a>
Examples of modeling domain networks within a utility network. For example, the water utility network can contain the base structure network with water, sewer, and cathodic protection domain networks.<\/figcaption><\/figure>\n

How are domain networks created? When you configure your utility network, domains are created using the Add Domain Network<\/a> tool or as part of the automated process for configuring a utility network via the Utility Network Package Tools<\/a>. Domain networks can be added to an established utility network if business needs change over time. For example, an additional domain network can easily be added to an existing utility network if a municipality that manages a water domain expands to add a gas domain.<\/p>\n

\"Utility<\/a>
For a municipal utility that serves gas and water, a single utility network can be used to manage both using domain networks. The image illustrates the base network feature classes created to represent the structure network, along with gas and water domain networks.<\/figcaption><\/figure>\n
\n
<\/dt>\n
<\/dt>\n
<\/dt>\n<\/dl>\n

The real world has many interdependencies between different utilities. The utility network <\/span>enables the real-world model to come to life by allowing capabilities such as connectivity between features from different domain networks. For example, you can have an electric domain network that feeds a water pump. Gas pipeline networks can be utilized to illustrate the network that supports electric combined cycle generation. <\/span><\/p>\n

Tiers<\/span><\/strong><\/p>\n

Utility systems are often organized into operational groups for the delivery of a utility resource.\u00a0 <\/span>An electric system is organized into transmission (high voltages), distribution (medium voltages) and secondary (low voltages). Gas and water systems have tiers for the gathering of gas or water, transmission of gas or water over long distances, and distribution of gas or water to the consumer. Domain networks within the utility network can be divided into <\/span>tiers<\/span><\/a> to segregate and manage subnetworks. Tiers model the hierarchy of how the network delivers resources such as gas, electricity, and<\/span> water and can represent ranges of pressure, voltage or other characteristics of the network.<\/span><\/p>\n

An electric distribution system can be divided into multiple tiers of sub-transmission<\/span>, medium voltage, and low voltage levels. Tiers can also represent parts of the network that can be isolated from one another such as a valve isolation zone in a pressure-based system. They all have unique rules and templates for responsive and appropriate integration. With the utility network, those rich rules and procedures can remain in place while your distribution and transmission features can communicate or trace across domains, providing solutions that best fit the business and end-user.\u00a0\u00a0 <\/span><\/span><\/p>\n

The tier definition chosen for the domain network controls the organization of tiers relative to the rest of tiers in a domain network and also decides the permissible tier topology types. You will have either a collection of partitioned successive tiers or a hierarchy of nested tiers. Tiers reside at either the domain network or at the tier group level, depending on the type\u00a0 <\/span>of model you are working with. There are two ways of organizing a domain network, using a partitioned or hierarchical tier definition. <\/span><\/p>\n