<div dir="ltr">Hi Matteo,<div><br></div><div>In addition to what has been already suggested, I feel like adding the following points.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span style="font-size:14.6667px">Currently I only have the nodes and edges of my city taken from OSM and </span><span style="font-size:14.6667px">uploaded to PostGIS.<br></span><span style="font-size:14.6667px">I am not an expert in Pgrouting but obviously I want to learn a lot.<br></span><span style="font-size:14.6667px">Currently I don't know what kind of function I have to choose and how to </span><span style="font-size:14.6667px">work with it.</span></blockquote><div><br></div><div>As you have successfully loaded the OSM data to PostGIS, the first step is completed. Now, every stop would correspond to a particular node (point/multipoint features) and the vehicle (truck) would be using edges (line/multiline features) for finding the optimized route. So, next questions:</div><div><br></div><div>1. Which functions to use?</div><div>A: As Daniel and Anita mentioned, you can choose to use <a href="https://docs.pgrouting.org/latest/en/pgr_TSP.html">pgr_TSP</a> (pgRouting function of Travelling Salesman Problem) or explore functions from <a href="https://docs.pgrouting.org/3.0/en/VRP-category.html">Vehicle Routing Functions Category</a>. </div><div><br></div><div>2. How to use the functions?</div><div>A: Marcus mentioned a superb source. <a href="https://workshop.pgrouting.org/">pgRouting Workshops</a> are another great source. I have been following the same to understand the implementation of algorithms. More specifically, <a href="https://workshop.pgrouting.org/2.6/en/chapters/shortest_path.html">Chapter 5</a> would give you an overview of implementing pgRouting algorithms (pgr_dijkstra and pgr_dijkstraCost functions) in general, on a PostGIS enabled db prepared using OSM data. Building on this, you can implement functions for your problem.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span style="font-size:14.6667px">Also, I wonder if pgrouting can suggest the best stops once it has<br></span><span style="font-size:14.6667px">calculated the best route of the whole network of streets and then divide </span><span style="font-size:14.6667px">the city into smaller areas for garbage collection on my own (and maybe use </span><span style="font-size:14.6667px">the same function for smaller areas) or if first I have to insert the stops </span><span style="font-size:14.6667px">together with the edges and nodes (or if there is some network analysis </span><span style="font-size:14.6667px">tool outside pgrouting that can suggest me the best areas and then do the </span><span style="font-size:14.6667px">work).</span></blockquote><div><br></div><div>I feel this could be automated as a script to perform routing for smaller views and then combining it together by creating network topology. The Chapter on <a href="https://workshop.pgrouting.org/2.6/en/chapters/topology.html">Creating a Network Topology</a> might be of help. But, my knowledge is restricted regarding this at the moment, I would love to hear more thoughts.</div><div><br></div><div>Hope this helps!</div><div>Kind regards,</div><div>Rajat</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 4, 2020 at 1:40 AM Marcus Young <<a href="mailto:M.A.Young@soton.ac.uk">M.A.Young@soton.ac.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





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Hi Matteo</div>
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I can thoroughly recommend this book on pgRouting:</div>
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<br>
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<a href="https://locatepress.com/pgrouting" target="_blank">https://locatepress.com/pgrouting</a></div>
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<div name="x_BB10" id="gmail-m_7809901087424429149x_BB10_response_div_BBPPID" dir="auto" style="width:100%">
It helped me so much when I was first getting to grips with it.</div>
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Best wishes</div>
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Marcus</div>
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<div id="gmail-m_7809901087424429149x_from"><b>From:</b> <a href="mailto:pgrouting-users-request@lists.osgeo.org" target="_blank">pgrouting-users-request@lists.osgeo.org</a></div>
<div id="gmail-m_7809901087424429149x_sent"><b>Sent:</b> 3 November 2020 20:00</div>
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<div id="gmail-m_7809901087424429149x_subject"><b>Subject:</b> Pgrouting-users Digest, Vol 131, Issue 2</div>
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   1. Re: Pgrouting-users Digest, Vol 131, Issue 1 (Matteo Ruggieri)<br>
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Message: 1<br>
Date: Tue, 3 Nov 2020 16:33:49 +0100<br>
From: Matteo Ruggieri <<a href="mailto:matteoruggieri91@gmail.com" target="_blank">matteoruggieri91@gmail.com</a>><br>
To: <a href="mailto:pgrouting-users@lists.osgeo.org" target="_blank">pgrouting-users@lists.osgeo.org</a><br>
Subject: Re: [pgrouting-users] Pgrouting-users Digest, Vol 131, Issue<br>
        1<br>
Message-ID:<br>
        <CAFaA-xJitS1v3hY5HDETjoaQSRUW=Y0RewQNXUmoAyZvLyj=<a href="mailto:2g@mail.gmail.com" target="_blank">2g@mail.gmail.com</a>><br>
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<br>
Hi Daniel,<br>
<br>
What I need is to build one or more waste collection routes for my city.<br>
For such project like this I guess I have to keep in mind the capacity of<br>
the truck: Anita Graser told me in a message that "for a single vehicle and<br>
if I can ignore the capacity, I could use the TSP or, for more complex<br>
cases, I could use the VRP" (as you suggested too).<br>
Anyway, I want a truck to start from point A, make its collection route<br>
passing through the points assigned to the driver (each stop corresponds to<br>
a building with an X number of waste bins) and then finally come back again<br>
to point A (depot).<br>
I have to say that I wonder what are the consequences if the truck reaches<br>
its maximum capacity during the route and just before returning to point A<br>
too..<br>
<br>
Currently I only have the nodes and edges of my city taken from OSM and<br>
uploaded to PostGIS.<br>
I am not an expert in Pgrouting but obviously I want to learn a lot.<br>
Currently I don't know what kind of function I have to choose and how to<br>
work with it.<br>
Also, I wonder if pgrouting can suggest the best stops once it has<br>
calculated the best route of the whole network of streets and then divide<br>
the city into smaller areas for garbage collection on my own (and maybe use<br>
the same function for smaller areas) or if first I have to insert the stops<br>
together with the edges and nodes (or if there is some network analysis<br>
tool outside pgrouting that can suggest me the best areas and then do the<br>
work).<br>
In the end, each individual driver must have an optimized route waste<br>
collection of a certain area available.<br>
I sincerely hope I have made you understand what my intentions are about<br>
this project.<br>
<br>
Regards,<br>
Matteo<br>
<br>
<br>
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Il giorno lun 2 nov 2020 alle ore 21:01 <<br>
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> Today's Topics:<br>
><br>
>    1. Route for waste collection with pgrouting (Matteo Ruggieri)<br>
>    2. Re: Route for waste collection with pgrouting (Daniel Kastl)<br>
><br>
><br>
> ----------------------------------------------------------------------<br>
><br>
> Message: 1<br>
> Date: Mon, 2 Nov 2020 13:13:01 +0100<br>
> From: Matteo Ruggieri <<a href="mailto:matteoruggieri91@gmail.com" target="_blank">matteoruggieri91@gmail.com</a>><br>
> To: <a href="mailto:pgrouting-users@lists.osgeo.org" target="_blank">pgrouting-users@lists.osgeo.org</a><br>
> Subject: [pgrouting-users] Route for waste collection with pgrouting<br>
> Message-ID:<br>
>         <<br>
> <a href="mailto:CAFaA-x%2B4vkcmvYA1tPPCY%2BNBAizV4BO1Eu1gF5Spchjkhg_heg@mail.gmail.com" target="_blank">CAFaA-x+4vkcmvYA1tPPCY+NBAizV4BO1Eu1gF5Spchjkhg_heg@mail.gmail.com</a>><br>
> Content-Type: text/plain; charset="utf-8"<br>
><br>
> Good morning,<br>
> I have just started using PostGIS and, at the moment, the only thing I have<br>
> done is to load node and edge data into the database with osm2pgrouting and<br>
> create the postgis, pgrouting and postgis_topology extensions<br>
> I need help in creating a routing optimized for door-to-door waste<br>
> collection (multiple stops) and with starting and ending point at the same<br>
> place. Can someone help me understand more?<br>
> Thanks<br>
><br>
> <<br>
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><br>
> ------------------------------<br>
><br>
> Message: 2<br>
> Date: Mon, 2 Nov 2020 21:44:58 +0900<br>
> From: Daniel Kastl <<a href="mailto:daniel@georepublic.de" target="_blank">daniel@georepublic.de</a>><br>
> To: pgRouting users mailing list <<a href="mailto:pgrouting-users@lists.osgeo.org" target="_blank">pgrouting-users@lists.osgeo.org</a>><br>
> Subject: Re: [pgrouting-users] Route for waste collection with<br>
>         pgrouting<br>
> Message-ID:<br>
>         <CABXBSH-C=<br>
> <a href="mailto:XXAwOPq6-hNgugVhTNa1UOT6pjobveVHFSqjA9DMQ@mail.gmail.com" target="_blank">XXAwOPq6-hNgugVhTNa1UOT6pjobveVHFSqjA9DMQ@mail.gmail.com</a>><br>
> Content-Type: text/plain; charset="utf-8"<br>
><br>
> Hi Matteo,<br>
><br>
> Can you explain to us a bit more details about the requirements of your<br>
> application?<br>
><br>
> There are a few functions in pgRouting, that can eventually do what you<br>
> need to do:<br>
> <a href="https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.pgrouting.org%2Flatest%2Fen%2FVRP-category.html&amp;data=04%7C01%7Cm.a.young%40soton.ac.uk%7Cc9e5af92eb624279831508d8803321a3%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637400304386109324%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=BtthRDyab%2BZZnYjJpWx%2FH7T8aaT11l9wYgiAiGzRRfU%3D&amp;reserved=0" target="_blank">
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><br>
> Best regards,<br>
> Daniel<br>
><br>
><br>
><br>
> On Mon, 2 Nov 2020 at 21:13, Matteo Ruggieri <<a href="mailto:matteoruggieri91@gmail.com" target="_blank">matteoruggieri91@gmail.com</a>><br>
> wrote:<br>
><br>
> > Good morning,<br>
> > I have just started using PostGIS and, at the moment, the only thing I<br>
> > have done is to load node and edge data into the database with<br>
> > osm2pgrouting and create the postgis, pgrouting and postgis_topology<br>
> > extensions<br>
> > I need help in creating a routing optimized for door-to-door waste<br>
> > collection (multiple stops) and with starting and ending point at the<br>
> same<br>
> > place. Can someone help me understand more?<br>
> > Thanks<br>
> ><br>
> ><br>
> > <<br>
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> --<br>
> Georepublic UG & Georepublic Japan<br>
> eMail: <a href="mailto:daniel.kastl@georepublic.de" target="_blank">daniel.kastl@georepublic.de</a><br>
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> ------------------------------<br>
><br>
> End of Pgrouting-users Digest, Vol 131, Issue 1<br>
> ***********************************************<br>
><br>
<br>
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<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2><br>
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<br>
Subject: Digest Footer<br>
<br>
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------------------------------<br>
<br>
End of Pgrouting-users Digest, Vol 131, Issue 2<br>
***********************************************<br>
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