2011

Table Of Contents

not with geometry. Any incomplete objects are registered, because only

complete objects can be edited.

To add or insert objects into a topology, the current drawing must be where

the topology was created. If the topology was created in a source drawing, you

must open that drawing to add objects to the topology. Make the layer

containing the topology objects current so new objects have the same

properties as objects already in the topology.

If you edit a topology and then use the Undo command, the altered geometry

is restored to its former state but the altered topology remains current. To

perform further editing on the topology,

unload and reload (page 906) the

topology. This applies to all topology functions.

Editing Topologies from More than One Drawing

To edit a topology that spans more than one drawing, you must edit the

topology in the drawing where it was created. The other drawings will be

attached to this drawing. First, query the topology into the drawing, then

unload (page 906) the topology from the source drawings and retrieve the

topology into the current drawing. You can edit part of a topology by querying

just the part you want, but the topology editing commands do not allow you

to edit the edges of a topology or an incomplete topology.

The safest option is to use a query to retrieve the entire topology. However,

if the topology is large, it may impair performance. With large topologies,

query the area to edit plus enough of an area around the edit area to ensure

that the objects to be edited are complete.

Editing a Network Topology

To modify a network topology, for example, adding a new pipe to a water

network, you can add nodes and links to an existing network topology, and

then

update (page 891) the topology to include the new pipes.

Before you edit a topology object, make sure the layer containing the topology

objects is the current layer.