2011

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 (page 1957),
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 (page
1955), 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.
832 | Chapter 6 Creating and Editing Data