2011

Creating a Network Topology
Network topology defines the interconnection of links and, optionally, nodes
at link junctions. Networks may contain loops. Network segments have a
specified direction. Links can be lines, open polylines, or arcs. You can use
information from different layers to define a network topology.
NOTE This functionality is for drawing objects only. There is no equivalent for
geospatial feature data. However, you can use buffers to analyze features by
proximity and perform overlay analysis on two geospatial feature layers. See
Buffering Features in Your Map (page 1306) and Overlaying Two Feature Sources
(page 1309).
If you plan to use the network topology for direction analysis, you can use
PEDIT to join a series of objects with the same flow direction into one object
with nodes at each vertex. The directions derived from arc objects might be
arbitrary; to control and edit these directions easily, use PEDIT to join segments
with the same direction.
When you create the network topology with nodes at each intersection, the
nodes do not significantly increase file size. You can use the nodes for
path
traces
(page 1324), best route analysis (page 1328), and flood traces (page 1333).
Object Data for Network Topology
Network topology information is stored on the links and nodes as object data.
Each element of the network topology has different object data values.
Object Data FieldObject Data TableTopology Name
IDTPMLINK_SAMPLE_NETSAMPLE_NET
START_NODE
END_NODE
DIRECTION
DIRECT_RESISTANCE
REVERSE_RESISTANCE
By default, each link is bidirectional. Both resistance and direction are stored
as object data. You can edit both direction (page 845) and resistance (page 849)
values.
Creating, Editing, and Managing Topologies | 829