Routes of A350 and B787 - updated visualisation

The latest version of the routes map has been updated to use great circle links between airports. There seem to be 2 options for this - getting Tableau or R to do the work. Getting R to do the work was easier for me (just an application of gcIntermediate()) than getting to grips with interpolation functions in Tableau. The cost is that you pass a lot of extra data. I suppose I could have used 2 files and done a join in Tableau instead, but the volumes are not huge. 

There are tableau workbooks around to do the work, but from tableau public it doesn't seem to be possible to open and copy the calculations as suggested.