N |
+ ..... link is NOT on minimum path tree W+E|
| S |
| |
| |
+ 1-+----+ . . . + . . . . . . . +----+-5 |
| | . | |
| | 4 . | |
| | | . | |
+ 2-+----+-------+---+ . + + . . . +----+-6 |
| | . | | |
| | 3 . | | |
| +-+ | | . | | |
+ |8|---+-----------+---+-------+-------+----7 |
| +-+ |
| |
+-------+-------+-------+-------+-------+-------+-------+-------+
Figure 2. Minimum Path Tree for Centroid #8
2.2.1 Create Interzonal Skim Trees
[Page]
Select network centroids to skim and compute shortest path trees.
Select centroids
Set Nodes as the Working Layer. Go to Tools / Selection. Add a selection set by clicking at the "+" button, then click the "Selection Settings" button. Select your new selection, then click on Remane... Enter Centroids as the new name of this selection. Then, click at the "Select by Pointing" button on the vertical tool box (the one on the right hand side of the window). You then can click on each of the centroids while pressing down the Shift key on your keyboard (selected nodes will be highlighted).
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