2011

AutoLISP expression for the Link Direct Resistance, and specify the travel time
for Maximum Value. This analysis will show the streets that can be reached
from a start node within the specified period of time.
See also:
■
Specifying the Direction for a Link (page 845)
■ Specifying the Resistance for a Link or Node (page 849)
■ Expression Evaluator (page 1541)
■ Expression dialog box (page 1807)
NOTE This procedure applies only to drawing objects. There is no equivalent for
geospatial features.
To perform a flood trace
1 Verify that you have a network topology available and it is loaded. See
Creating Topologies (page 821) and To load a topology (page 907).
2 In
Map Explorer (page 2068), under Current Drawing, right-click a network
topology ➤ Analysis ➤ Network Analysis.
3 In the
Network Topology Analysis - Select Method dialog box (page 1983),
click Flood Trace. Click Next.
4 In the Network Topology Analysis - Choose Locations dialog box, click
Start Point. Click Select Point
to select the starting point in the map.
Press Enter to return to the dialog box.
AutoCAD Map 3D uses the node closest to the location you clicked as
the start point. The coordinates of the point are shown in the list.
5 Review the start point you have specified. The coordinates of the point
are shown in the list.
■ To double-check the location of a point in the map, highlight the
coordinates in the list. Click Preview.
■ To delete the point so that you can define a new one, highlight the
coordinates in the list. Click Delete.
6 Click Next.
7 In the Network Topology Analysis - Resistance and Direction dialog box,
select limits to put on the trace. For resistance and direction, you can
1334 | Chapter 8 Analyzing Data