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.