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demote admin boundaries for place areas

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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 commit is contained in:
Sarah Hoffmann
2020-10-14 11:33:47 +02:00
parent e47c19beb9
commit 7e9412a044
1 changed files with 16 additions and 3 deletions
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19
sql/functions/placex_triggers.sql
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@@ -609,6 +609,7 @@ BEGIN
IF NEW.class = 'boundary' and NEW.type = 'administrative'
and NEW.osm_type = 'R' and NEW.rank_address > 0
THEN
-- First, check that admin boundaries do not overtake each other rank-wise.
parent_address_level := get_parent_address_level(NEW.centroid, NEW.admin_level);
IF parent_address_level >= NEW.rank_address THEN
IF parent_address_level >= 24 THEN
@@ -617,12 +618,24 @@ BEGIN
NEW.rank_address := parent_address_level + 2;
END IF;
END IF;
-- If a place node is contained in a admin boundary with the same address level
-- and has not been linked, then make the node a subpart by increasing the
-- address rank (city level and above).
-- Second check that the boundary is not completely contained in a
-- place area with a higher address rank
FOR location IN
SELECT rank_address FROM placex
WHERE class = 'place' and rank_address < 24
and rank_address > NEW.rank_address
and geometry && NEW.geometry
and ST_Relate(geometry, NEW.geometry, 'T*T***FF*') -- contains but not equal
ORDER BY rank_address desc LIMIT 1
LOOP
NEW.rank_address := location.rank_address + 2;
END LOOP;
ELSEIF NEW.class = 'place' and NEW.osm_type = 'N'
and NEW.rank_address between 16 and 23
THEN
-- If a place node is contained in a admin boundary with the same address level
-- and has not been linked, then make the node a subpart by increasing the
-- address rank (city level and above).
FOR location IN
SELECT rank_address FROM placex
WHERE osm_type = 'R' and class = 'boundary' and type = 'administrative'