If this is the first time that the layer is being used for network analysis then this option must be selected in order to generate the layer's topology.
- Select the option Compute the network over the original layer.
Options for generating the network topology
- Click Next.
In the second window of the wizard attribute fields containing values for the following parameters can be selected (these fields must be defined as numeric):
- Type of route: Indicates what type of route each segment is.
- Length: The length of each segment in metres.
- Cost: Indicates the cost of traversing each segment.
- Conversion factor: Factor to convert the cost field.
- Direction field: The field containing the segment direction.
- Digitised direction: Value indicating the direction of digitising.
- Reverse digitised direction: Value indicating the opposite direction of digitising.
- Save .net file: The directory and file for saving the topology.
NOTE: Any values other than those indicated in the Digitised direction and Reverse digitised direction settings will be taken to indicate flow in both directions along a segment.
Dialog for configuring fields
Click the check-boxes alongside parameters that will be included in the topology generation. From the drop-down lists select the attribute fields corresponding to each parameter.
Selecting the fields that help define the network topology
Press the "Finish" button to start the generation of the topography. A window showing the progress of the operation will appear.
Progress of topology generation
