MAPLINKADD (Add Topology Link command)

Danger:

This command will not be supported in future releases. This is the old command for adding a link to a topology. The new command is MAPAL.

Use this command to add a link to an existing network or polygon topology while maintaining the integrity of the topology information.

Respond to the prompts:

Enter topology name (? for list) <toponame>:

Enter the name of the topology to add the link to. To display a list of all loaded topologies, enter ?.

Enter first point:

Enter the coordinates for the first point of the line, or select the point.

Arc/Close/Halfwidth/Length/Undo/Width/<Endpoint of line>:

For information about this prompt, see the PLINE command in the AutoCAD help.

You can use MAPLINKADD to add a link in three ways:

• In space (connecting no existing nodes). Two new nodes are created at the link endpoints in space.
• From one existing node to a point in space. A new node is created at the end point in space.
• From one existing node to another existing node.

A topology must have a node at the end points of all link objects. This node is part of the topology data structure and is assigned a topology ID. However, a node can be implicit (referenced in the topology data structure) or explicit (a physical object in the drawing). Use the MAPNODADD or MAPNODINS command to create a new node.

When you add a link to a topology, AutoCAD Map 3D toolset creates a node when necessary. If the link joins two existing nodes, no new nodes are created. Remember these features of nodes and links:

• A node can reference many links.
• A link can reference only two nodes.
• Only one node can exist at a specific point.

If the new link splits an existing area in a polygon topology into two areas, AutoCAD Map 3D toolset creates a new centroid and updates the existing centroid.