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HOW TO CONNECT INTERSECTING POLYLINES




This article is on how to prepare polylines or roads to work correctly - ©


All intersecting polylines need to be connected if you want traffic to route through them –ie being able to make a left or right turn at that point.

This is a sample of HUE map (by Ryo Nakagawara) that was originally created for GPS use but was not auto routeable.


Connecting Nodes


This is one of the ways to make it auto routeable

Select Tools – Edit Nodes (or press M)

Click on road that has missing node at intersection, (Vertical road in diagram)

Place mouse on area where you want to insert node, (line will turn magenta)

Right click – Insert Node (or press Insert)


Connecting Nodes - 1


Click on the same node again

Then right click Connect to nearest node


Connecting Nodes - 2


If done correctly, node will turn YELLOW

Nodes will have different colours depending on how many polylines are connected together at the intersection.

NUMBER OF INTERSECTING LINES

NODE COLOUR

Two

Yellow

Three

Green

Four or more

Magenta





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