Creating a Network Topology
Concept Procedure Quick Reference
 
 
 

To create a network topology

  1. Do one of the following to bring the linework into the current drawing:
    • Attach the drawings containing the linework. Query the linework into the current drawing.
    • Open the drawing containing the linework.
    • Import the linework from another file format.
  2. Click Create tabTopology panelNew. At the Command prompt, enter maptopocreate.
  3. In the Create Topology - Select Topology dialog box, do the following:
    • Click Network to specify the type of topology to create.
    • Enter a name and description for the new topology.

      Names can contain letters, numbers, and the underscore, hyphen, and dollar characters. Names cannot include spaces.

    • Click Next.
  4. In the Create Network Topology - Select Links dialog box, specify the links to include in the topology:
    • To include all links in the map, click Select All.
    • To manually select the links to include, click Select Manually. Click Select Links to select the links in the map. When you finish selecting links, press Enter.
    • To filter (restrict) link selection by layer (only links on the specified layers will be selected), specify the layers in the Layers box. To select from a list of layers in the map, click Select Layers. If the layer is not listed, it may be Frozen, Locked, or Off. To use all layers, enter an asterisk (*).
    • To filter link selection by object class, specify the object classes in the Object Classes box. Only links that belong to the specified object classes will be included in the topology.

      Layer and object class filters apply to both the automatic and manual selection of links.

    • Click Next.
  5. In the Create Network Topology - Select Nodes dialog box dialog box, select the nodes to include:
    • To include all nodes, click Select All.
    • To select nodes manually, click Select Manually. Click Select Nodes to select the nodes.
    • To filter (restrict) node selection by layer (only the nodes on the specified layers are selected), specify the layers in the Layers box.
    • To use only selected blocks as node objects, specify the blocks in the Blocks box. To use points as nodes, select the ACAD_POINT block.
    • To filter node selection by object class, specify the object classes in the Object Classes box. Only nodes that belong to the specified object classes are included in the topology.
    • To have AutoCAD Map 3D create node objects at the endpoint of links, click Next. Otherwise, go to step 7.
  6. In the Create Network Topology - Create New Nodes dialog box, do the following:
    • To create new nodes, select Create New Nodes.
    • Select a layer for the new nodes.
    • Select a block to use for the nodes. To use a point object, select ACAD_POINT. Modify the appearance of a point object using the PDMODE and PDSIZE system variables. For more information, see POINT in the AutoCAD Help.
  7. Click Finish to create the topology.
  8. If appropriate, save the topology information back to source drawings.

For information about adding direction and resistance, see the following topics:

Specifying the Direction for a Link

Specifying the Resistance for a Link or Node