Adding Nodes and Links

It is possible to add Nodes and Links to an existing network and this topic details how to do this in theory and shows an example on our example network.

InfoWorks ICM includes facilities for rapidly adding nodes and links to the GeoPlan without having to name each object or view the object property sheet. This means that you can carry out a process similar to digitising on the GeoPlan View. With the help of GIS data, you can add nodes and links very rapidly.

Each node can be automatically given an ID, normally based on its location. You can also add connected runs of nodes and links together, including adding bends in links, allowing you to build up your network structure in the minimum amount of time.

Once you have set up your digitising options, you can use the normal node and link creation tools to add new objects to your network.

Adding a Node

Nodes can be added on the GeoPlan View, the Long Section View, or the Grid View.

Adding a link

Links can be added on the GeoPlan View or the Grid View.


Example of Adding Nodes and Links


This stage assumes that you have started InfoWorks ICM and that the Explorer window is open, showing the network icon for the Langley Catchment Study Model Group.


Before making a start on this tutorial, it is important to ensure that the units of measurements shown in InfoWorks ICM displays are set to metric. For this, select Options... from the Tools menu and click the Units tab. Ensure that default units are set to Metric (Native).

To add nodes and links to the example network:

  1. Open the 'Langley Network - New Estate' network.
  2. ClosedShow me

  3. Display the background map if it is not already displayed. ClosedRight-click the GeoPlan, select the GIS Layer control... option from the context menu, click 'MapC' in the GIS Layers list, add a check in the Visible box and click OK.
  4. There are pipes running behind the houses on the east of the estate. However, a pipe is also needed along the road that runs down eastward of the estate, with manholes at each of the two road junctions (node id '44628202').

  5. Check the length of the required run:
    1. Zoom in on the road where the pipes are to be added. ClosedYou can, for example, use the Find in GeoPlan option in the GeoPlan menu to zoom onto the required road. In the dialog, enter the node id, in this case, 44628202, and click the Find button, and the GeoPlan will be centred on the specified node which is located at the start of the run.
    2. ClosedShow me

    3. Use the (Measure distance) tool to estimate the total length of the new run. ClosedClick node id, '44628202' and then click each of the intermediate points along the street where a bend may occur. The cumulative distance is displayed in the status bar.

      ClosedShow me

  6. Add nodes at each of the three road junctions:
    1. Select the option from the drop-down list on the GeoPlan Tools Toolbar.
    2. Click the Add a new node to the network button (New object) button on the toolbar.
    3. Click in the centre of the first road junction, and the Create New Node dialog is displayed.
    4. ClosedShow me

    5. Enter '44629002' as the ID and click OK. The Node property sheet is displayed in the object properties window.

      ClosedShow me

    6. Note that required data (highlighted by red flags in the property sheet) such as Ground level can be added later.

    7. Repeat steps 4c and 4d for the other two junction, using '44629003' and '44619904' as the node ids.
  7. Connect up the nodes:
    1. Select the option from the drop-down list on the GeoPlan Tools Toolbar.
    2. Click the Add a new node to the network button button on the toolbar. ClosedThe cursor changes to on the GeoPlan.
    3. Click the starting point for the link (i.e. the node at the start of the run, in this case, node '44628202')
    4. Click the road halfway between the nodes to create a bend in the link.
    5. Click the node at the end of the link (node '44629003'), and a Create New Link window is displayed.
    6. ClosedShow me

      If you do not specify a Suffix, InfoWorks ICM will automatically allocate one.

    7. Click OK and the conduit property sheet is displayed in an object properties window.
    8. ClosedShow me

      Note that required data (highlighted by red flags in the property sheet) such as Width can be added later.

    9. Repeat steps 5c to 5f to add the two other links, including "link bends" where necessary, to complete the links between nodes '44629003' and '4469002'.

      ClosedShow me

  8. Commit the changes to the network, without validation.
  9. Close the GeoPlan view by clicking the button in the top right-hand corner of the window.


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Network Objects

Digitizing Network Objects