to take attributes from matching feature with largest area of overlap only
This allows for easy polygon->polygon joins, where you expect there to be
only a single matching feature and don't want to include features which
are just touching or have just tiny sliver polygon overlaps.
Sponsored by SMEC/SJ
There's two motivations for this:
- the existing one was getting massive and took ages to run, which was
a pain when developing. Smaller batches allow just a subset of test to
be run which is much faster.
- There's a random segfault on test exit which occurs on Travis. Rather
then disabling these absolutely critical tests altogether, I'm using
this as a method of bisecting exactly which alg is causing this.
