Tags give the ability to mark specific points in history as being important
Last version without absolute value of Rossby number
Last version with radius in m in output of cost_function.py
Last version with radius in m in output of cost_function.py
Last version assuming that first date in shapefiles corresponds to first line of ishape_last.txt
Last version assuming colocated u and v
Last version reading only the first time step of input files
Last version working only for uniform longitude-latitude grid
Last version deducing `periodic` from input data
Last version requiring u and v in the same file
Last version without trajectory property in graph created by trajectory.py
Last version working with Contour_531 v0.2
Last version targetting computation of contours directly in longitude and latitude.