calculating shortest path using different methods

KhaledAhmed — Fri, 25 Jul 2014 16:45:52 GMT

Dear all,

I am trying to get the shortest path in behave of (time - distance) between a set of 200 nodes.

I have two method to find it:

using shortest path method ( calculated between two points - it will take a lot of time).
using OD matrix method ( very fast).

So i have created a small network (6 nodes) to check the results of each method.

For distance: the results from two methods are the same.
For Time: there are differences between the two methods. Also, there are differences when i change between the origin and destination for the both methods (for example: time from node 2 to node 3 & from node 3 to node 2).

I hope any one can tell me about the reasons of different results.

*attached the results of the simple network.

Re: calculating shortest path using different methods

DanPatterson_Retired — Sat, 19 Dec 2015 00:56:03 GMT

It is sometimes the case that going from A to B is not the same as going from B to A because of the differences in costs associated with the traversal. This could be complicated by one-way streets, differences in speed limits, turn restrictions etc. So without knowing exactly what was done, it is possible to make any conclusions as to the differences

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calculating shortest path using different methods

Re: calculating shortest path using different methods