[OSGeo-Discuss] Advice on implementing VRP in FOSS4G

[Daniel Kastl]

Hi David,

We have implemented something like this last year for pgRouting (extension
of PostGIS/PostgreSQL). It's very similar to what you describe.
Our goal was to have some genetic algorithm to solve the dial-a-ride problem
for bus-on-demand as described here
http://openvrp.com/blog/darp-algorithm-in-pgrouting/ or here
http://georepublic.de/en/projects/openvrp/

<http://openvrp.com/blog/darp-algorithm-in-pgrouting/>It was a funded
research project and we're currently implementing a real bus-on-demand
system using taxis and micro-buses.
There are plenty of similar problems related to VRP and a lot
of possibilities to add new functionality as you describe. If you're
interested you can join the pgRouting community (http://www.pgrouitng.org)
and we can discuss details there.

Best regards,
Daniel


2011/2/15 cremat0rio <davidsantospinheiro at gmail.com>

>
> Hi everyone!
>
> I’m new on this list, so all the best for all of you and for OSGeo!
>
> I’m writing to get some advice. For my master degree project, I’ll try to
> create some code to solve Vehicle Routing Problem (VRP) through
> Evolutionary
> Computation techniques (Genetic Algorithms and stuff like that). It would
> be
> very good to put this code to work on some GIS desktop Software and make it
> simple to use, suitable for any layperson.
>
> VRP is a problem where you have some vehicles that need to serve some
> places, and you want to distribute them through that area reducing their
> overall cost (is terms of fuel consumption, time spent, eco impact, etc.).
> For example, distributing waste collection trucks to different areas of a
> city, or mailmen’s through some city, or some companies’ trucks that need
> to
> serve mail packages to a country, etc… All this problems have in common
> that
> we want the vehicles (or humans) to be routed on the network to serve some
> locations.
> In terms of implementation we need a LINESTRING layer representing the road
> network (of some city, for example) and a POINT (or POLYGON) layer
> representing the places that need to be visited (served). Then given some
> vehicle’s positions and capacities, and some charging/discharging places
> the
> code would calculate good routes that minimize the mentioned costs.
>
> As I’ve said, it would be good for this package/software to be suitable for
> use for any person, so a Desktop GIS implementation would be good.
> The problem is that there seems to be two main computing language paradigms
> in the FOOS4G Desktop GIS software’s, Java vs C++.  Which one to choose?
> Which DesktopGis software? Or should I implement something (some function)
> in Postgres/Postgis? Or on the command line (on top of OGR)?
> In the beginning I thought that a plugin for QuantumGis would be the best
> option because the plugins are relatively independent of the core
> developer’s work/supervision, and anyone can choose to install it or not.
> But this way people that use Java based DesktopGIS (like gvSig) couldn’t
> benefit from this work…
> So, I’m asking for your kind advice.
>
> Any help/advice will be much appreciated!
>
> All the best,
> David Pinheiro
>
> --
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> http://osgeo-org.1803224.n2.nabble.com/Advice-on-implementing-VRP-in-FOSS4G-tp6023900p6023900.html
> Sent from the OSGeo Discuss mailing list archive at Nabble.com.
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-- 
Georepublic UG & Georepublic Japan
eMail: daniel.kastl at georepublic.de
Web: http://georepublic.de
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