145 lines
3.7 KiB
SQL
145 lines
3.7 KiB
SQL
/*
|
|
==========================================================================
|
|
|
|
phase 2 : calcul d'itinéraires en appui du réseau routier OSM
|
|
|
|
==========================================================================
|
|
*/
|
|
|
|
-- dans la base redadeg on a chargé la couche osm_roads qui a été calculée
|
|
-- à partir de données OSM
|
|
|
|
|
|
|
|
-- 2. ajout d'un nouvel attribut sur la table osm_roads
|
|
-- normalement il existe déjà mais au cas où on a rechargé un nouveau réseau routier
|
|
SELECT topology.AddTopoGeometryColumn('osm_roads_topo', 'public', 'osm_roads', 'topo_geom', 'LINESTRING');
|
|
|
|
|
|
-- 3. on calcule le graphe topologique
|
|
-- en remplissant le nouvel attribut géométrique
|
|
-- le 1er chiffre est l'identifiant du layer dans la table topology.layer
|
|
-- le 2e chiffre est la tolérance en mètres
|
|
UPDATE osm_roads SET topo_geom = topology.toTopoGeom(the_geom, 'osm_roads_topo', 1, 0.00001);
|
|
-- 1.0 = 18 min
|
|
-- 0.00001 = 2 min
|
|
|
|
-- à ce stade on a un graphe topologique dans le schema osm_roads_topo
|
|
|
|
|
|
-- 4. remplissage de la couche routable depuis la couche d'origine et la topologie
|
|
-- on commence par vider avant de remplir
|
|
TRUNCATE TABLE osm_roads_pgr ;
|
|
--TRUNCATE TABLE osm_roads_pgr_noded ;
|
|
TRUNCATE TABLE osm_roads_pgr_vertices_pgr ;
|
|
-- reset des séquences
|
|
ALTER SEQUENCE osm_roads_pgr_vertices_pgr_id_seq RESTART WITH 1;
|
|
--ALTER SEQUENCE osm_roads_pgr_noded_id_seq RESTART WITH 1;
|
|
|
|
INSERT INTO osm_roads_pgr
|
|
( SELECT
|
|
row_number() over() as id,
|
|
o.osm_id,
|
|
o.highway,
|
|
o.type,
|
|
o.oneway,
|
|
o.ref,
|
|
o.name_fr,
|
|
o.name_br,
|
|
NULL as source,
|
|
NULL as target,
|
|
NULL as cost,
|
|
NULL as reverse_cost,
|
|
e.geom as the_geom
|
|
FROM osm_roads_topo.edge e,
|
|
osm_roads_topo.relation rel,
|
|
osm_roads o
|
|
WHERE e.edge_id = rel.element_id
|
|
AND rel.topogeo_id = (o.topo_geom).id
|
|
);
|
|
|
|
-- calcul des 2 attributs de coût (= longueur)
|
|
UPDATE osm_roads_pgr SET cost = st_length(the_geom);
|
|
UPDATE osm_roads_pgr SET reverse_cost = st_length(the_geom);
|
|
|
|
|
|
-- 5. calcul du graphe routier par pgRouting
|
|
SELECT pgr_createTopology('osm_roads_pgr', 1.0);
|
|
-- 35 s
|
|
|
|
-- vérification
|
|
SELECT pgr_analyzegraph('osm_roads_pgr', 1.0);
|
|
SELECT pgr_nodeNetwork('osm_roads_pgr', 1.0);
|
|
|
|
|
|
-- il ne reste plus qu'à faire des calculs d'itinéraires
|
|
-- on met le résultat dans une table
|
|
TRUNCATE TABLE phase_2_trace_pgr ;
|
|
INSERT INTO phase_2_trace_pgr
|
|
SELECT
|
|
-- info de routage
|
|
a.seq AS id,
|
|
a.path_seq,
|
|
a.node,
|
|
a.cost,
|
|
a.agg_cost,
|
|
-- infos OSM
|
|
b.osm_id,
|
|
b.highway,
|
|
b."type",
|
|
b.oneway,
|
|
b.ref,
|
|
b.name_fr,
|
|
b.name_br,
|
|
b.the_geom
|
|
FROM pgr_dijkstra(
|
|
'SELECT id, source, target, cost, reverse_cost FROM osm_roads_pgr',
|
|
7632, 687) as a
|
|
JOIN osm_roads_pgr b ON a.edge = b.id ;
|
|
|
|
|
|
|
|
TRUNCATE phase_2_trace_troncons ;
|
|
INSERT INTO phase_2_trace_troncons
|
|
SELECT
|
|
row_number() over() as uid,
|
|
-- infos redadeg
|
|
NULL AS secteur_id,
|
|
NULL AS ordre,
|
|
NULL AS km,
|
|
NULL AS km_reel,
|
|
NULL AS longueur,
|
|
-- infos OSM
|
|
t.osm_id, t.highway, t.type, t.oneway, t.ref, t.name_fr, t.name_br,
|
|
ST_LineSubstring(the_geom, 1000.00*n/length,
|
|
CASE
|
|
WHEN 1000.00*(n+1) < length THEN 1000.00*(n+1)/length
|
|
ELSE 1
|
|
END) AS the_geom
|
|
FROM
|
|
(SELECT
|
|
id,
|
|
osm_id, highway, "type", oneway, ref, name_fr, name_br,
|
|
ST_LineMerge(the_geom)::geometry(LineString,2154) AS the_geom,
|
|
ST_Length(the_geom) As length
|
|
FROM phase_2_trace_pgr
|
|
-- ce tri est le plus important
|
|
ORDER BY id ASC
|
|
) AS t
|
|
CROSS JOIN generate_series(0,10000) AS n
|
|
WHERE n*1000.00/length < 1
|
|
ORDER BY t.id ;
|
|
|
|
-- mise à jour des attributs
|
|
UPDATE phase_2_trace_troncons
|
|
SET
|
|
longueur =
|
|
(CASE
|
|
WHEN TRUNC( ST_Length(the_geom)::numeric , 0) = 999 THEN 1000
|
|
ELSE TRUNC( ST_Length(the_geom)::numeric , 0)
|
|
END),
|
|
km = uid -- km redadeg
|
|
;
|
|
|
|
|