Removes admin level 7, which should not exist and promotes
admin level 8 to municipality level.
place=municipality is only used for boroughs of St. Petersburg,
so demote to level 18.
Fixes#926.
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.
Also demote the address rank of an admin boundary when there
is a place area of higher rank that completely contains the
area. This catches the case where city boundaries do not exactly
align with administrative units (see for example Moscow).
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.
If a place node of city rank and above finds itself in an
administrative boundary of the same address rank, then
increase the address rank by 2. This catches the rather
frequent case where city suburbs are tagged for historical
reasons as towns or villages.
In structured queries we should only assume that it is
a postcode search when only the postcode and optionally
the country is given. If any other term is present, it
is better to avoid the search for postcode as it yields
too many bad searches. Given that the terms in a structured
query are ordered, this means that the postcode must be
the first token just like in the unstructured query.
Fixes#1988.
The latest version of osm2pgsql no longer creates indexes on
the members of planet_osm_rels. So we do that ourselves.
Given that we only need to access associated street relations,
the index can become quite a bit smaller.
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.
We can't use getNearFeatures() to determine the parent of a
place with an unlisted addr:place because this function
returns place nodes that are potentially outside the area
of interest. Doing the complete address computation is too
expensive, so simply use the area with the largest rank that
contains the feature instead.
