This reverts commit 559fe513fa.
Increasing the splitting results in geometries where with rounding
issues at the split points, so that contain operations do not
work as expected anymore.
Fixes#2137.
The new address computation assumes that the centroid is inside
the area. Therefore we cannot use the centroid function. Use the
pre-computed centroid instead which has already been corrected to
be inside the area.
This is a complete rewrite of the selection of address parts to
be inserted into the place_addressline table.
The new algorithm selects for each rank:
* the boundary overlapping with the addressee and contained
in the already selected boundaries of lower rank, or failing that
* the place node closest to the addressee that is contained in
the already selected boundaries and in the influence radius
of already selected place nodes of lower rank
Place nodes that are not contained in already selected boundaries
of lower rank are completely thrown away. All other candidates are
added as non-address parts.
Using both is slightly problematic because they have different
ways to use the index. Newer versions of Postgis exhibit a
query planner issue when both functions appear together.
As ST_Intersects includes ST_Covers, simply remove the latter.
When computing the address parts for a geometry, we need to do
a ST_Relates lookup in the location_area_large_* tables. This is
potentially very expensive for geometries with many vertices.
There is already a funtion for splitting large areas to reduce the
impact. This commit reduces the minimum area of a split, effectively
increasing the number of splits.
The effect on database size is minimal (around 3% increase), while
the indexing speed for streets increases by a good 60%.
So far we've used a buffer around a place node to define its
potential address reach. This had two problems: the buffer was
so large that addresses often contain false positives and the
buffer is really distorted when getting closer to the poles.
Change the buffer here to draw a bounndig box at a certain
distance in meter. This means that we always use the same
box everywhere on the planet and can make the extent much
smaller. Using a box has the advantage that it is much faster
to figure out if a point is within the box.
