Function returning MVT ready geoms and MVT data in JSON
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antoniocarlon
parent
811009a8ad
commit
0ae15880e0
@ -222,10 +222,16 @@ CREATE OR REPLACE FUNCTION cdb_observatory.OBS_GetMCDOMVT(z INTEGER, x INTEGER,
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geography_level TEXT,
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do_measurements TEXT[],
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mastercard_measurements TEXT[],
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shoreline_clipped BOOLEAN DEFAULT True,
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optimize_clipping BOOLEAN DEFAULT False,
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simplify_geometries BOOLEAN DEFAULT False,
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area_normalized BOOLEAN DEFAULT False,
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mastercard_category TEXT DEFAULT 'Total Retail',
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extent INTEGER DEFAULT 4096, buf INTEGER DEFAULT 256, clip_geom BOOLEAN DEFAULT True)
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RETURNS TABLE (mvt BYTEA)
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RETURNS TABLE (
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mvtgeom GEOMETRY,
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mvtdata JSON
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)
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AS $$
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DECLARE
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state_geoname CONSTANT TEXT DEFAULT 'us.census.tiger.state';
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@ -252,6 +258,7 @@ DECLARE
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numer_tablenames_do_outer TEXT DEFAULT '';
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numer_tablenames_mc TEXT;
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numer_colnames_do TEXT;
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numer_colnames_do_qualified TEXT;
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numer_colnames_do_normalized TEXT;
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numer_colnames_mc TEXT;
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numer_colnames_mc_normalized TEXT;
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@ -262,7 +269,7 @@ DECLARE
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geom_relations_do TEXT[];
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geom_relations_mc TEXT;
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simplification_tolerance NUMERIC DEFAULT 0.0001;
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simplification_tolerance NUMERIC DEFAULT 0;
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area_normalization TEXT DEFAULT '';
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i INTEGER DEFAULT 0;
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clipped TEXT default '';
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@ -271,25 +278,32 @@ BEGIN
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area_normalization := '/area_ratio';
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END IF;
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IF shoreline_clipped THEN
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clipped := '_clipped';
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END IF;
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CASE
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WHEN geography_level = state_geoname THEN
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simplification_tolerance := 0.1;
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IF optimize_clipping THEN
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clipped := '';
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END IF;
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WHEN geography_level = county_geoname THEN
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clipped := '_clipped';
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simplification_tolerance := 0.01;
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WHEN geography_level = tract_geoname THEN
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clipped := '_clipped';
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simplification_tolerance := 0.001;
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WHEN geography_level = blockgroup_geoname THEN
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clipped := '_clipped';
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simplification_tolerance := 0.0001;
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WHEN geography_level = block_geoname THEN
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clipped := '_clipped';
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simplification_tolerance := 0.0001;
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ELSE
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RETURN;
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END CASE;
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IF NOT simplify_geometries THEN
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simplification_tolerance := 0;
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END IF;
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bounds := cdb_observatory.OBS_GetTileBounds(z, x, y);
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geom := ST_MakeEnvelope(bounds[1], bounds[2], bounds[3], bounds[4], 4326);
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ext := ST_MakeBox2D(ST_Point(bounds[1], bounds[2]), ST_Point(bounds[3], bounds[4]));
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@ -308,14 +322,15 @@ BEGIN
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END IF;
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SELECT array_agg(distinct 'observatory.'||numer_tablename) numer_tablenames,
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string_agg(distinct numer_tablename||'.'||numer_colname, ',') numer_colnames,
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string_agg(distinct numer_colname, ',') numer_colnames,
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string_agg(distinct numer_tablename||'.'||numer_colname, ',') numer_colnames_qualified,
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string_agg(distinct numer_colname||area_normalization||' '||numer_colname, ',') numer_colnames_normalized,
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(array_agg(distinct 'observatory.'||geom_tablename))[1] geom_tablenames,
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(array_agg(distinct geom_colname))[1] geom_colnames,
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(array_agg(distinct geom_geomref_colname))[1] geom_geomref_colnames,
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(array_agg(distinct geom_tablename||'.'||geom_geomref_colname))[1] geom_geomref_colnames_qualified,
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array_agg(distinct numer_tablename||'.'||numer_geomref_colname||'='||geom_tablename||'.'||geom_geomref_colname) geom_relations
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INTO numer_tablenames_do, numer_colnames_do, numer_colnames_do_normalized, geom_tablenames, geom_colnames,
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INTO numer_tablenames_do, numer_colnames_do, numer_colnames_do_qualified, numer_colnames_do_normalized, geom_tablenames, geom_colnames,
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geom_geomref_colnames, geom_geomref_colnames_qualified, geom_relations_do
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FROM json_to_recordset(meta)
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AS x(id TEXT, numer_id TEXT, numer_aggregate TEXT, numer_colname TEXT, numer_geomref_colname TEXT, numer_tablename TEXT,
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@ -323,8 +338,9 @@ BEGIN
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denom_type TEXT, denom_reltype TEXT, geom_id TEXT, geom_colname TEXT, geom_geomref_colname TEXT, geom_tablename TEXT,
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geom_type TEXT, numer_timespan TEXT, geom_timespan TEXT, normalization TEXT, api_method TEXT, api_args JSON);
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IF numer_tablenames_do IS NULL OR numer_colnames_do IS NULL OR numer_colnames_do_normalized IS NULL OR geom_tablenames IS NULL OR
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geom_colnames IS NULL OR geom_geomref_colnames IS NULL OR geom_geomref_colnames_qualified IS NULL OR geom_relations_do IS NULL THEN
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IF numer_tablenames_do IS NULL OR numer_colnames_do IS NULL OR numer_colnames_do_qualified IS NULL OR numer_colnames_do_normalized IS NULL
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OR geom_tablenames IS NULL OR geom_colnames IS NULL OR geom_geomref_colnames IS NULL OR geom_geomref_colnames_qualified IS NULL
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OR geom_relations_do IS NULL THEN
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RETURN;
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END IF;
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@ -350,36 +366,17 @@ BEGIN
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numer_tablenames_mc := '"'||mastercard_schema||'".'||mastercard_table;
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geom_relations_mc := mastercard_table||'.'||mastercard_geoid||'='||geom_geomref_colnames_qualified;
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IF numer_colnames_mc IS NULL OR numer_colnames_mc_normalized IS NULL OR numer_tablenames_mc IS NULL OR geom_relations_mc IS NULL THEN
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IF numer_colnames_mc IS NULL OR numer_colnames_mc_normalized IS NULL
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OR numer_tablenames_mc IS NULL OR geom_relations_mc IS NULL THEN
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RETURN;
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END IF;
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---------Query build and execution---------
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/*
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%1$s: geom_colnames
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%2$s: numer_colnames_do (DO measurements)
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%3$s: numer_colnames_mc (MasterCard measurements)
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%4$s: numer_tablenames_mc (MasterCard measurements)
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%5$s: geom_tablenames
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%6$s: geom_relations_do (DO measurements)
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%7$s: geom_relations_mc (MasterCard measurements)
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%8$s: numer_tablenames_do (DO measurements)
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%9$s: mastercard_table
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%10$s: mastercard_category_column
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%11$s: numer_colnames_do_normalized (Area normalized DO measurements)
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%12$s: numer_colnames_mc_normalized (Area normalized MasterCard measurements)
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%13$s: geom_geomref_colnames
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$1: ext (BOX2D)
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$2: extent
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$3: buf
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$4: clip_geom
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$5: geom
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$6: mastercard_category
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*/
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RETURN QUERY EXECUTE format(
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$query$
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SELECT ST_AsMVT(q, 'data', $2) FROM (
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SELECT mvtgeom,
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(select row_to_json(_) from (select id, %13$s, %3$s, area_ratio) as _) as mvtdata
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FROM (
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SELECT ST_AsMVTGeom(the_geom, $1, $2, $3, $4) AS mvtgeom, %12$s as id, %10$s, %11$s, area_ratio FROM (
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SELECT %1$s the_geom, %12$s, %2$s, %3$s,
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CASE WHEN ST_Within($5, %1$s)
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@ -395,9 +392,9 @@ BEGIN
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) p
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) q
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$query$,
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geom_colnames, numer_colnames_do, numer_colnames_mc, numer_tablenames_do_outer, numer_tablenames_mc,
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geom_tablenames, geom_relations_mc, mastercard_table, mastercard_category_column,
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numer_colnames_do_normalized, numer_colnames_mc_normalized, geom_geomref_colnames)
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geom_colnames, numer_colnames_do_qualified, numer_colnames_mc, numer_tablenames_do_outer, numer_tablenames_mc,
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geom_tablenames, geom_relations_mc, mastercard_table, mastercard_category_column, numer_colnames_do_normalized,
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numer_colnames_mc_normalized, geom_geomref_colnames, numer_colnames_do)
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USING ext, extent, buf, clip_geom, geom, mastercard_category, simplification_tolerance
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RETURN;
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END
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