63 lines
1.5 KiB
SQL
Executable file
63 lines
1.5 KiB
SQL
Executable file
/*
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==========================================================================
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phase 2 : Mise à jour des couches de routage
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==========================================================================
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*/
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-- /!\
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-- cela suppose que la couche osm_roads est à jour !!
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-- or cette couche est calculée à partir d'une BD osm cf la documentation
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-- maj de la couche support des calculs d'itinéraire
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-- 30 s
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-- on commence par vider les couches existantes
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TRUNCATE TABLE osm_roads_pgr ;
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DROP TABLE IF EXISTS osm_roads_pgr_noded ;
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DROP TABLE IF EXISTS osm_roads_pgr_vertices_pgr ;
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-- reset de la sequence
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ALTER SEQUENCE public.osm_roads_pgr_noded_id_seq RESTART WITH 1 ;
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-- on remplit la couche de lignes
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INSERT INTO osm_roads_pgr
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( SELECT
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row_number() over() as id,
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o.osm_id,
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o.highway,
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o.type,
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o.oneway,
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o.ref,
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o.name_fr,
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o.name_br,
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NULL as source,
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NULL as target,
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NULL as cost,
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NULL as reverse_cost,
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e.geom as the_geom
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FROM osm_roads_topo.edge e,
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osm_roads_topo.relation rel,
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osm_roads o
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WHERE e.edge_id = rel.element_id
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AND rel.topogeo_id = (o.topo_geom).id
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);
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-- calcul des 2 attributs de coût (= longueur)
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UPDATE osm_roads_pgr SET cost = st_length(the_geom), reverse_cost = st_length(the_geom);
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-- calcul du graphe routier par pgRouting
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-- cela va remplir les tables osm_roads_pgr_noded et osm_roads_pgr_vertices_pgr
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-- 30 s
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SELECT pgr_createTopology('osm_roads_pgr', 0.001);
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-- vérification
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SELECT pgr_analyzegraph('osm_roads_pgr', 0.001);
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SELECT pgr_nodeNetwork('osm_roads_pgr', 0.001);
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