[R-sig-Geo] Adding great circle routes as polylines in Leaflet

[Dhiraj Khanna]

Thanks Kent, this looks great!
Hopefully I should be able to convince my client to use this as a
visualization rather than the rather sparse looking current visualization
on a leaflet map.
Regards

Dhiraj Khanna
Mob:09873263331


On Tue, Sep 4, 2018 at 3:55 PM Kent Johnson <kent3737 using gmail.com> wrote:

>
>
> On Tue, Sep 4, 2018 at 12:18 AM, Dhiraj Khanna <dhirajkhanna using gmail.com>
> wrote:
>
>> @Kent Johnson <kent3737 using gmail.com> yes, this is shipping data and you are right, great circle routes are not the best visualization. The problem I am facing is that I have oil trade happening over a period of time from various ports that I need to visualize. Over the selected period of time, there are hundreds of voyages being undertaken by ships. Plotting them all as gc routes looks ugly. My approach has been to classify these ports into regions, which I drew using mapedit and saved them as SF polygons. I then calculated their centroids and those are the coordinates in the ByRoute dataframe. Would appreciate your comments on any other visualization which you think might be appropriate.
>>
>> If your primary interest is to visualize the flows (not the geography)
> then a circle plot might work well. Here is an example showing migration
> flows:
>
> https://gjabel.wordpress.com/2016/05/18/updated-circular-plots-for-directional-bilateral-migration-data/
> made with
> https://cran.r-project.org/web/packages/circlize/index.html
>
> Kent
>
>
>> Regards
>> Dhiraj Khanna
>>
>

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