more suggestions to version 0.1

[falkamelung]

1. Most (info all) plotdata options should be inferred from the data (e.g. start-date end-date). Once you have a first plot you can refine the options. For that we need a few functions to calculate the defaults, e.g.
   calculate_default_period, (calculated from start-date and-date of data)
   calculate_default_section (10 km section centered on volcano coords from Smithsonian)
   calculate_default_lalo (volcano coords as given in smithonian)
   calculate_reference_point (use reference point from the first dataset)

Information on available data comes from /data/log/ files on jetstream.
With that typing

plot_data.py Chiles --mintpy
plot_data.py Chiles --miaplpy
plot_data.py ChilesSenAT120/mintpy ChilesSenDT142/mintpy
plot_data.py CameroonSenA132/miaplpy_201701_202501/network_delaunay_4/ CameroonSenD51/miaplpy_201704_202501/network_delaunay_4

would create an initial plot.

(Later: 2. We should have an option to create the periods based on the VEI information from the Smithsonian. In addition to the full period we would consider periods before and after VEI4 and/or VEI3 separately. Later we will use the same logic for selecting startDate and endDate for additional processing to make sure coherences is not affected by eruptive material.)