Exceeds the limit of visited nodes

openrouteservice matrix
1

Please can you advise how I can solve the ‘unable to compute a distance/duration matrix: Search exceeds the limit of visited nodes’. I have seen this in a thread previously but have never seen a solution to this. I think that the maximum number of visited nodes can be increased but I am struggling to find out how to do this. Please can you advise

many thanks

2

In order to protect the servers of resource exhaustion, they are configured to limit the number of graph nodes that may be visited during a path search. On the public API these numbers are quite high and should normally not be reached. If you have a large matrix and/or long distances, however, the limits might be exceeded. To work around this limitation, you might split up your matrix in several smaller ones.

3

Many thanks for your response. Are you able to confirm what constitutes a ‘large matrix’ just for future use. I think I had roughly 650 journeys and the vast majority of them were less than 15 miles.

Many thanks

4

This doesn’t sound too much. Other reasons for having to visit many nodes could be

  • a dense street network like in a large city
  • restrictions that causes falling back to a less efficient algorithm