update_osm_roads_pgr
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MaelREBOUX
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scripts_v2/sql/update_osm_roads_pgr.sql
Executable file
62
scripts_v2/sql/update_osm_roads_pgr.sql
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/*
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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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87
scripts_v2/update_osm_roads_pgr.sh
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87
scripts_v2/update_osm_roads_pgr.sh
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#! /bin/bash
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# exit dès que qqch se passe mal
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set -e
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# sortir si "unbound variable"
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#set -u
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if [ -z "$1" ]
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then
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echo "Pas de millésime en argument --> stop"
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exit 1
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fi
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# lecture du fichier de configuration
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. config.sh
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echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
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echo " Mise à jour des couches de routage"
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echo ""
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echo " prend 15-20 min"
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echo ""
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# la couche osm_roads vient d'être mise à jour ou recrée
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# on efface la topologie existante
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PGPASSWORD=$DB_PASSWD $PSQL -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -c "SELECT DropTopology('osm_roads_topo') ;"
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# création d'un schéma qui va accueillir le réseau topologique de la couche osm_roads
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PGPASSWORD=$DB_PASSWD $PSQL -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -c "SELECT topology.CreateTopology('osm_roads_topo', 2154);"
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# ajout d'un nouvel attribut sur la table osm_roads
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PGPASSWORD=$DB_PASSWD $PSQL -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -c "SELECT topology.AddTopoGeometryColumn('osm_roads_topo', 'public', 'osm_roads', 'topo_geom', 'LINESTRING');"
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# on a besoin du layer_id
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# au cas où ça change : on le récupère par requête
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PGPASSWORD=$DB_PASSWD $PSQL -X -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME \
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-c "SELECT layer_id FROM topology.layer WHERE table_name = 'osm_roads' ;" \
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--single-transaction \
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--set AUTOCOMMIT=off \
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--set ON_ERROR_STOP=on \
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--no-align \
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-t \
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--field-separator ' ' \
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--quiet | while read -a Record ; do
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layer_id=${Record[0]}
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echo ""
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echo "layer_id de osm_roads = $layer_id"
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echo ""
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done
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# sauf que je n'arrive pas à sortir cette valeur du subshell créé par la boucle do /!\
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# donc je remet ici à la main. A corriger… TODO
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layer_id=1
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# on calcule le graphe topologique en remplissant le nouvel attribut géométrique
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# le 1er chiffre est l'identifiant du layer dans la table topology.layer
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# le 2e chiffre est la tolérance en mètres
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echo ">> calcul du graphe topologique"
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PGPASSWORD=$DB_PASSWD $PSQL -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -c "UPDATE osm_roads SET topo_geom = topology.toTopoGeom(the_geom, 'osm_roads_topo', $layer_id, 0.00001);"
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echo ""
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echo "fait"
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echo ""
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echo ">> maj de la couche osm_roads_pgr qui sert au routage depuis la topologie"
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PGPASSWORD=$DB_PASSWD $PSQL -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME < sql/update_osm_roads_pgr.sql
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#echo ">> patch de la couche osm_roads_pgr pour les cas particuliers"
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#$PSQL -h $DB_HOST -U $DB_USER -d $DB_NAME < patch_osm_roads_pgr.sql
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echo ""
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echo ""
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echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
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echo " F I N "
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echo "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"
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echo ""
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echo "/!\ patcher le filaire de voie si nécessaire"
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echo ""
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echo ""
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