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Question

simplify road network to remove islands?

  • March 5, 2019
  • 2 replies
  • 23 views

nicholas
Contributor
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I have a dataset of local roads, which I want to use for ShortestPathFinder.

 

The road network includes roads on islands, and those roads are not connected to the roads on the mainland.

Is there a transformer that can output only those roads that are part of the mainland road network? I want to eliminate the islands.

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2 replies

david_r
Celebrity
  • 8394 replies
  • March 5, 2019

You can use the NetworkTopologyCalculator to find all the "self-contained" networks and then only keep the one with the largest number of roads (group by _network_id).


ebygomm
Influencer
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  • Influencer
  • 3429 replies
  • March 5, 2019

If your from-to lines are all points on the mainland network then there shouldn't be an issue using this as a network in the ShortestPathFinder without removing the island road networks