Esri ArcGIS Desktop Professional Certification Study Guide. Mike Flanagan

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СКАЧАТЬ a network build. Connectivity is important for accurate analysis results and can be used to help you model multimodal transportation systems in areas with a complex transportation infrastructure. After you have modeled connectivity, you can use network attributes to give ArcGIS additional information about the network dataset, leading to more accurate analysis results. For example, a cost attribute can be used to measure and model factors that can impede travel, such as travel time or traffic volume at a given time of the day.

      Reminder

      ArcGIS Pro 1.4 provides limited functionality for creating and working with network datasets. Please refer to the ArcGIS Pro Help links for a detailed discussion of the current state of network datasets and network analysis in ArcGIS Pro.

      Prepare

      These topics in the documentation provide details about network datasets.

      Gain a thorough understanding of these ArcGIS Pro Help topics:

        Help > Analysis and geoprocessing > Network Analyst > Get started > What is the ArcGIS Network Analyst extension?

        Help > Analysis and geoprocessing > Network Analyst > Network datasets > What is a network dataset?

        Help > Analysis and geoprocessing > Network Analyst > Network datasets > Network dataset concepts > Network elements

      Gain a thorough understanding of these ArcMap Help topics:

        Extensions > Network Analyst > What is the ArcGIS Network Analyst extension?

        Extensions > Network Analyst > Essential ArcGIS Network Analyst extension vocabulary

       Extensions > Network Analyst > Network datasets >What is a network dataset?Designing the network datasetNetwork elementsUnderstanding connectivityUnderstanding network attributes

        Extensions > Network Analyst > Network datasets > Building and editing the network dataset > Creating a network dataset

       Extensions > Network Analyst > Network datasets > Building and editing the network dataset > Editing network datasets >Ways to edit network datasetsAdding network sourcesModifying connectivity

      Geometric networks

      Geometric networks give ArcMap users the ability to model directed-flow networks, where each edge has a fixed direction of flow (such as the flow of electricity through a utility network). A geometric network consists of junctions, such as a valve, and simple or complex edges. These features are sourced by feature classes in a feature dataset in a geodatabase. Simple edges allow a resource to enter through only one end of the edge and to exit through the other. An example of a simple edge is a water lateral. Complex edges allow resources to enter and exit through the ends and through additional junctions along their length. An example of a complex edge is a water main that is connected to multiple water laterals along its length.

      Reminder

      ArcGIS Pro does not offer geometric network support. At ArcGIS Pro 2.x, the new utility network has assumed the management of utility and telecom networks in ArcGIS.

      Geometric networks are created in the ArcMap Catalog window or using tools in the Geometric Network toolset. The Geometric Network tools can be used to manage and analyze geometric networks. For example, you can use these tools to perform a variety of tracing functions, including downstream trace, upstream trace, isolation trace, and path trace. Geometric network analysis can be affected by using attribute weights that represent the cost of traversing an edge in the network. They can also incorporate the use of disabled features that represent disconnected features or can temporarily disable features without requiring you to delete them. This functionality is useful in cases in which a temporary power outage occurs on one portion of a utility network. As you edit a geometric network, ArcGIS maintains connectivity between the network’s features.

      Prepare

      These topics in the documentation provide details about geometric networks.

      Gain a thorough understanding of these ArcMap Help topics:

       Manage data > Data types > Geometric networks >What are geometric networks?A quick tour of geometric networksEssential geometric networks vocabulary

        Manage data > Data types > Geometric networks > Creating and managing geometric networks

        Manage data > Data types > Geometric networks > Editing geometric networks > Overview of editing geometric network features

        Manage data > Data types > Geometric networks > Analyzing geometric networks > Tracing on geometric networks > About tracing on geometric networks

      Practice

      Complete these tasks to get more hands-on experience:

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