Gotchas

http://twiav-tt.blogspot.dk/2012/07/postgis-using-latitude-and-longitude-to.html http://www.bostongis.com/postgis_makeline.snippet

Sources:

http://zevross.com/blog/2014/09/30/use-the-amazing-d3-library-to-animate-a-path-on-a-leaflet-map/ http://big-elephants.com/2014-06/unrolling-line-charts-d3js/

other stuff:

http://igortihonov.com/2015/02/18/four-years-of-running-visualized-with-leaflet-and-d3/