The problem is (again) caused by the --precomp-sea option which
adds a lot of data to this tile.
This was already reported before and I don't see a simple
solution besides the trimming.
Possible solution:
Splitter calculates the tile sizes only based on the number of
nodes in the input file.
What we need is the number of nodes added by the --precomp-sea
option
So, either splitter could read these files and calculate the
number of nodes,
or the sea generator could create a file that contains the
number. This would save
processing time because sea tiles don't change often. Problem
with this 2nd approach:
The resolution of the grid that is used in splitter depends on
the resolution parameter.