Nils Brinckmann authored Aug 10, 2021 and Nils Brinckmann committed Aug 10, 2021

The deflate compression is the algorithm used for zip archives.
It is loss less and features some more tweaking options in order
to get smaller results.

With the usage of quite heavy compression options, we can reduce
the usual amount of memory of shakemap geotiff files to need only
around 60% of the original size using the lzw algorithm.

Of cause, read and write times will increase. But as the size of
a single shakemap is relativly small (our problem with the size is
the pure amount that we have for the earthquake explorer), it should
not be totally bad to work with those files later.

Cleanup and fixes to fdsnws importer

See merge request pevans/shakyground2!1

- Seems like behaviour of ET changed around Python 3.6-3.9.
- Add test that dictionary has meaningful content.

- Also, silence mypy.

- Allow operating on a local QuakeML event file.
- Add unit tests for this.

Prepares a dictionary with the interesting things found
by reading the QuakeML file served for a given event.

- If no focal mechanism is present, return None in
  those components of the dictionary; YAML serialises
  these as 'null'.
- Parse FM XML object for all six nodal plane angles.
- Catch float conversion problems by omitting output of these.
- Check event id looks okay.
- If called from command line, report outfile name.