[OSRM-talk] Recreating the same route in another dataset

[Daniel Patterson]

Take the route geometry you obtained from your 2020 dataset, and use the
`/matching`  service to match that to your older dataset.

If it's impossible to match (e.g. because roads disappeared), well, then
it's impossible to match.  The `/matching` service allows for some
coordinate imprecision, so it should take care of roads that were moved a
bit.

daniel

On Thu, Oct 8, 2020 at 8:11 AM Martin Schmidl <msts.martin at gmail.com> wrote:

> Hi,
>
> I am calculating a route with OSRM on my dataset of a city in 2020. I want
> to try if I can do exactly the same route on an older dataset of the same
> city (e.g in 2014). At the moment I am computing the route in 2020 and
> extracting the nodes of the fastest route. I check which of the nodes did
> not exist back in 2014 with Overpass and delete those from the list of
> nodes which i have to visit. Now the list of nodes gets converted to their
> respective coordinates in 2014. However, when I want to route over all the
> segments in order (by iteratively routing segments between those nodes in
> OSRM), I sometimes get loops, which I can't seem to prevent because a node
> in 2020 and 2014 might exist, but might not be exactly on a road in 2014
> (screenshot of an example attached).
>
> Maybe someone worked on something similar before and got an idea how to
> solve this, i'd appreciate it!
>
>
> Best regards
> Martin
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