150 lines
4.1 KiB
SQL
150 lines
4.1 KiB
SQL
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-- permet de créer 1 seule ligne pour 1 secteur
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DELETE FROM phase_3_trace_secteurs WHERE secteur_id = 100 ;
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WITH t AS (
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SELECT *
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FROM phase_2_trace_troncons
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WHERE secteur_id = 100
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)
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INSERT INTO phase_3_trace_secteurs
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SELECT
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secteur_id, s.nom_fr, s.nom_br,
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0 as km_reels,
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--ST_AsText(ST_LineMerge(ST_Collect(t.the_geom))) as txt_geom,
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ST_LineMerge(ST_Collect(t.the_geom)) as the_geom
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FROM t JOIN secteur s ON t.secteur_id = s.id
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GROUP BY t.secteur_id, s.nom_fr, s.nom_br ;
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UPDATE phase_3_trace_secteurs
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SET km_reels = TRUNC( ST_Length(the_geom)::numeric /1000 , 1)
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WHERE secteur_id = 100 ;
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--The below example simulates a while loop in
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--SQL using PostgreSQL generate_series() to cut all
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--linestrings in a table to 100 unit segments
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-- of which no segment is longer than 100 units
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-- units are measured in the SRID units of measurement
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-- It also assumes all geometries are LINESTRING or contiguous MULTILINESTRING
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--and no geometry is longer than 100 units*10000
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--for better performance you can reduce the 10000
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--to match max number of segments you expect
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TRUNCATE phase_3_trace_troncons ;
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INSERT INTO phase_3_trace_troncons
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SELECT
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row_number() over(),
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secteur_id,
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ST_LineSubstring(the_geom, 1000.00*n/length,
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CASE
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WHEN 1000.00*(n+1) < length THEN 1000.00*(n+1)/length
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ELSE 1
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END) As the_geom
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FROM
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(
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SELECT
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secteur_id,
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ST_Length(the_geom) AS length,
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ST_LineMerge(the_geom) AS the_geom
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FROM phase_3_trace_secteurs
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) AS t
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CROSS JOIN generate_series(0,10000) AS n
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WHERE n*1000.00/length < 1;
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-- la table qui va accueillir une couche support de calcul itinéraire phase 3
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-- à savoir les tronçons phase 2 découpés tous les x mètres
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DROP TABLE IF EXISTS phase_3_troncons_pgr CASCADE ;
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CREATE TABLE phase_3_troncons_pgr
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(
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secteur_id integer,
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-- info de routage
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id serial,
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source bigint,
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target bigint,
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cost double precision,
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reverse_cost double precision,
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-- info OSM
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osm_id bigint,
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highway text,
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type text,
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oneway text,
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ref text,
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name_fr text,
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name_br text,
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the_geom geometry,
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--CONSTRAINT enforce_geotype_the_geom CHECK (geometrytype(the_geom) = 'LINESTRING'::text),
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CONSTRAINT enforce_srid_the_geom CHECK (st_srid(the_geom) = 2154)
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);
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CREATE INDEX phase_3_troncons_pgr_geom_idx ON phase_3_troncons_pgr USING gist(the_geom);
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ALTER TABLE phase_3_troncons_pgr OWNER to redadeg;
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-- on supprime les données pour le secteur
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DELETE FROM phase_3_troncons_pgr WHERE secteur_id = $secteur_id ;
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-- on charge, pour le secteur concerné des tronçons courts découpés tous les x mètres
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-- (densification avec ST_LineSubstring )
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INSERT INTO phase_3_troncons_pgr (secteur_id, osm_id, highway, type, oneway, ref, name_fr, name_br, the_geom)
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SELECT
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secteur_id, osm_id, highway, type, oneway, ref, name_fr, name_br,
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ST_LineSubstring(the_geom, $long_km_redadeg*n/length,
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CASE
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WHEN $long_km_redadeg*(n+1) < length THEN $long_km_redadeg*(n+1)/length
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ELSE 1
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END) As the_geom
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FROM
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(
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SELECT
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secteur_id, osm_id, highway, type, oneway, ref, name_fr, name_br,
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ST_Length(the_geom) AS length,
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the_geom
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FROM phase_2_trace_troncons
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WHERE secteur_id = $secteur_id
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) AS t
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CROSS JOIN generate_series(0,10000) AS n
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WHERE n*$long_km_redadeg/length < 1;
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-- calcul des attributs de support du calcul pour PGR
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UPDATE phase_3_troncons_pgr
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SET cost = st_length(the_geom), reverse_cost = st_length(the_geom)
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WHERE secteur_id = $secteur_id ;
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-- optimisation
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VACUUM FULL phase_3_troncons_pgr ;
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-- création / maj de la topologie pour les tronçons nouvellement créés
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SELECT pgr_createTopology('phase_3_troncons_pgr', 0.001, rows_where:='true', clean:=true);
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-------------
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SELECT *
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FROM pgr_drivingDistance(
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'SELECT id, source, target, cost, reverse_cost FROM phase_3_troncons_pgr WHERE SOURCE IS NOT NULL',
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107, 300);
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-- RAZ de la topologie pgRouting
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TRUNCATE TABLE phase_3_troncons_pgr;
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ALTER SEQUENCE phase_3_troncons_pgr_id_seq RESTART WITH 1;
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VACUUM phase_3_troncons_pgr;
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TRUNCATE TABLE phase_3_troncons_pgr_vertices_pgr;
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ALTER SEQUENCE phase_3_troncons_pgr_vertices_pgr_id_seq RESTART WITH 1;
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VACUUM phase_3_troncons_pgr_vertices_pgr;
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