[Qgis-user] Can you help me?

[Nicolas Cadieux]

Hi,
You have multiple tools that can help.  You can use the QGIS network plugins.  It’s already installed but you need to activate the « processing » plugin.  You will find multiple shortest path analysis.  

You can also install the Chinese postman plugin made to calculate the most efficient route.  You will find a lot of other plugins if you search the plugin directory with the tag « network analysis ». 

The plugin QNEAT3 is well done and well documented. It was interesting OD matrixes (origine-destination).  

You will most likely need to look at home grown plugins for this type of work.

https://plugins.qgis.org/plugins/tags/network-analysis/

https://plugins.qgis.org/plugins/chinesepostman/

https://root676.github.io/


Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 29 juin 2021 à 05:45, Antonio Mattei <man360130 at gmail.com> a écrit :
> 
> 
> Dears Members,
> I have read all the Qgis manual.
> I found it a fundamental aid for navigation and I also found this very interesting.
> However, I couldn't understand out if Qgis can solve my problem or not…
> .
> At first glance I don't think so but I want to be sure of this.
> So I try to explain better what I have to do, what I am looking for.
> For the moment I have to chart a course without considering the prevailing
> weather, winds and currents.
> This is because I will have to leave on April 12, 2022 from Monaco in the
> Mediterranean and return there after having touched 150 ports in an
> expedition that will last about a year around the globe.
> I accepted the assignment on behalf of the World Health Organization for a
> Post Covid19 project. I have always been involved in Fundraising and NGOs
> (Non-Governmental Organizations) and have been commander of commercial
> boats since 1983.
> The expedition will depart from Monaco (Monte Carlo, between Italy and
> France) and will have to touch the 150 ports of the UN countries that have
> access to the sea, before returning to Monte Carlo after about a year.
> This is to raise awareness in all countries of the world and to bring
> unused vaccines in richer countries to poorer ones.
> It is an expedition in which all participants will be volunteers funded by
> the European Union, the UN and the WHO.
> We will start with an icebreaker and 8 different commanders will alternate
> in command of which I will be the first and last and it is also up to me to
> calculate the route.
> Starting from Montecarlo then we will have to touch all the countries of
> the world.
> I am looking for help to do this.
> My idea is to start from Monte Carlo and first touch all the countries of
> the Mediterranean and the Black Sea, then go through Suez and
> Circumnavigate Africa clockwise after also touching Pakistan and India, go
> up to the Baltic Sea and Iceland and get to New York.
> From there go down to Cuba and then up to Suriname and then go back, go all
> the Caribbean and pass in the Pacific from Panama to do the whole Pacific
> coast, Cape Horn up to Rio Grande in Brazil and then up to Japan and
> Australia.
> Do all the Far East and then return to the Mediterranean from the Indian
> Ocean and Suez.
> But I'm not sure this is the shortest route.
> This is why I am looking for a software or an app capable of automatically
> calculating the best route starting from Monte Carlo and returning to Monte
> Carlo after having touched 150 different ports.
> Not a precise navigation route, which then should take into account the
> weather, currents and winds and that we can do just before leaving, but a
> rough route. A route that tells me in which sequence it would be better to
> touch all the ports to cover the minimum distance and save as much fuel as
> possible.
> If you can help me or if you think Qgis is capable of doing this let
> me know.
> Greetings
> Antonio
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