cartodb4/observatory-extension
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improvements to scoring, fixing oversimplification and removing some premature optimization

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This commit is contained in:
John Krauss
2016-12-01 21:50:39 +00:00
parent 4ce1648550
commit 44932be1f5
3 changed files with 18 additions and 21 deletions
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6
src/pg/sql/41_observatory_augmentation.sql
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@@ -341,7 +341,7 @@ CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetMeasure(
normalize TEXT DEFAULT NULL,
boundary_id TEXT DEFAULT NULL,
time_span TEXT DEFAULT NULL,
simplification NUMERIC DEFAULT 0.0001
simplification NUMERIC DEFAULT 0.00001
)
RETURNS NUMERIC
AS $$
@@ -408,7 +408,7 @@ BEGIN
USING COALESCE(boundary_id, ''), measure_id, COALESCE(time_span, ''),
CASE WHEN ST_GeometryType(geom) = 'ST_Point' THEN
st_buffer(geom::geography, 10)::geometry(geometry, 4326)
ELSE ST_Envelope(geom)
ELSE geom
END;
IF geom_id IS NULL THEN
@@ -485,7 +485,7 @@ BEGIN
sql = format('WITH _subdivided AS (
SELECT ST_Subdivide($1) AS geom
), _geom AS (SELECT SUM(ST_Area(ST_Intersection(s.geom, geom.%I)))
/ ST_Area(FIRST(geom.%I)) overlap, geom.%I geom_ref
/ ST_Area(cdb_observatory.FIRST(geom.%I)) overlap, geom.%I geom_ref
FROM observatory.%I geom, _subdivided s
WHERE ST_Intersects(s.geom, geom.%I)
GROUP BY geom.%I),