Trace Multiple Elements

Instructions for use

According to the trend of the network, a plurality of set nodes or arcs are tracked and analyzed.

Operation steps

  1. Open the Network Dataset for Network Analysis.
  2. On the Spatial Analysis tab, in the Facility Network Analysis group, select the Environment Settings check box to bring up the Environment Settings window. Set the Network AnalysisBasic Parameters (such as Weight Field, node/Edge ID Field, etc.), Analyst Result parameter, and Flow Direction Field of tracking analysis in this window. For an introduction to the Environment Settings window, see Network AnalysisEn vironment Settings window Page.
  3. Create a new instance of Trace Multiple Elements. On the Spatial Analysis tab, in the Facility Network Analysis group, click the Network Analysis Drop-down Button. Select the Multi-element Tracing item in the drop-down menu that pops up. After the instance is successfully created, the Instance Management window automatically pops up. For an introduction to the Instance Management window, see the Instance Management window page.
  4. Click The Parameter Settings "button in the Network Analysis Instance Management window to pop up the Multi-element Tracing Settings" dialog box. Set the Analysis Parameters.
    • Feature Type: Click the Feature Type drop-down arrow to select the feature type to be analyzed. Two types of nodes and arc segments are supported. When the element type is node, the network node is selected as the analysis element; otherwise, Select Edge is selected as the analysis element. The Context Menu in the Instance Management window does not support import and export when the feature type is arc.
    • Analysis Type: Five Analysis Types are available:

      Common Upstream: trace the upstream path that all analysis elements can reach together against the network direction.

      Common Downstream: Follow the direction of the network to trace the downstream path that all analysis elements can reach together.

      Connected Edge: Trace all arcs that are connected to the analysis feature.

      Unconnected Edge: Trace all arc segments that are not connected to the analysis feature.

      Multi-connected Loops: trace all the loops connected to the analysis elements.

      For a description of each Analysis Type, see the Analysis Type of the Trace Multiple Elements. page.

    • Loop Valid: whether the network loop is involved in the analysis when setting the analysis. If this option is selected, the loop will participate in the tracking analysis; otherwise, it will not participate.
      • When

      completed, click the OK button to exit the Multi-element Tracing Settings "dialog box.

  5. Adds a node or arc segment to the current network layer. Add nodes or arc segments according to the feature type set in the previous step. Adding a node is similar to adding a site in Transportation Analysis, that is, you can use Add by Mouse or import it. Arc segments can only be added by means of Draw. Please refer to the Import Stops dialog box for specific operations.

    Note: If you need to delete a node, you can select the "Node" directory node in the Instance Management window, and select "Remove" in the pop-up Context Menu or select the node to be deleted and press the Delete key.

  6. When all Parameter Settings are complete, Click the Execute button in the Facility Network Analysis group on the Spatial Analysis tab or the Execute button on the Instance Management window to perform the analysis. The Analyst Result is displayed immediately in the Map. Analyst Results can be Save as Dataset for use elsewhere.