Use this dialog box to specify how to determine resistance for links and nodes and to specify how to determine the direction of link objects for the network analysis.
Specify how to determine the direction of link objects for the analysis.
Enter a value or enter the location of the data to use to determine the direction of the links. To select the location of the data from a list, click Expression Builder. Select the data to use. You can also enter any valid expression. See Expression Evaluator. If you leave the box blank, bi-directional (0) is used.
| If the expression evaluates to... | Link Direction is... |
|---|---|
| 0 or a character | Bi-directional> |
| A positive number | The physical direction |
| A negative number | The reverse of the physical direction |
Select this option to use the reverse of the direction indicated in the Link Direction field.
Specify how to determine resistance for links and nodes. Enter the location of the data to use to determine the direct resistance and reverse resistance of link objects and the resistance of nodes. To use values in an object data table or external database, click Expression Builder. Select the data to use. You can also enter any valid expression.
The best route cannot be be calculated if the network topology contains negative resistance values or if all resistance values equal zero (or use expressions that evaluate to zero). If all resistance values equal zero, every route is as good as another, and there is no "best route."
Use settings that you previously saved.
Save the current settings so you can use them again.
Close the dialog box without performing the network analysis.
Display the previous dialog box.
Click to display the Network Topology Analysis - Output dialog box.
Perform the network analysis using the current settings.