Hi Chris,

Thank you for your response. You got it right that I am using point samples of a vehicle's travel to estimate the most likely path it actually followed along a road network. I have tried using ORSM tools earlier. The path would have been accurate if my co-ordinates were exactly on the road network. However, the data set that I have posses, has the co-ordinates that are slightly away from the road network at several locations. The figure attached with the mail shows the stated problem. The vehicle should have taken a straight path as can be seen that it follows a straight route. However, the two co-ordinates in the paths are drifted away from the road network that leads to an unrealistic movement for the vehicle. Hence, I need some tool that can adjust such drifted co-ordinates ( probably through some technique) as well as draw a path between all such points in a similar fashion as the existing ORSM tool does. And, in case there is no such tool that can do both, can you please suggest some method to overcome the problem?

Thanks and Regards,

__________________________________________

Advani Chintan Sanjeev

Research Scholar,
Civil Engineering and Build Environment,
Queensland University of Technology,

Brisbane-4000, Australia.

On Tue, Jun 4, 2019 at 12:15 PM Chris Duncan, GISmatters <[log in to unmask]> wrote:

Can you describe a bit more precisely what you wish to do? It sounds
like perhaps you have point samples of a vehicle's travel and you want
to estimate from those the most likely path it actually followed along a
road network? If that's your aim, you need to familiarize yourself with
the challenges and rewards of route-matching, e.g. using OSRM:

http://project-osrm.org/

It's been a few years since I worked with this stuff, but I think the
general approach is still reasonably well presented in this paper by
some of the early researchers:

https://www.ismll.uni-hildesheim.de/lehre/semSpatial-10s/script/6.pdf

You don't have to master that material to use OSRM, but it's good to
understand some of the challenges involved in what is a more or less
constrained estimation (educated-guessing) problem whose success depends
on the quality (density, accuracy, and precision) of your point data.

If you have some other goal in mind, please try to clarify.

Chris

On 6/3/19 9:55 PM, Chintan Advani wrote:
> Hi guys,
>
> I am looking for some tools in ARCGIS/ QGIS that can help me to plot the
> trajectories using the lat/long coordinates for different vehicles. It
> would be great if someone can suggest some inbuilt tools as I am new to
> this these software and need some guidance. I even tried to install a
> map-matching python script based tools from some online source but
> facing issues during execution. I can even share the sample data if that
> can be helpful.
>
> Thank you in anticipation.
>
> __________________________________________
> Advani Chintan Sanjeev
> Research Scholar,
> Civil Engineering and Build Environment,
> Queensland University of Technology,
> Brisbane-4000, Australia.
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Chris Duncan, Ph.D.
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