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communes-algerie-shp

Créer un shape des communes d'Algérie à partir des données d'OpenStreetMap

Les fichiers générés :

Screenshot Screenshot

Récupération des données OSM

cd datas
wget http://download.geofabrik.de/africa/algeria-latest.osm.pbf

Chargement dans postgreSQL

Préparer la BDD et ajouter postGIS

psql -c "drop database osm;"
psql -c "create database osm"
psql -d osm -c "create extension postgis;"

Charger (de données OSM vers PG) avec ogr2ogr en pointant le fichier osmconf.ini

ogr2ogr -f PostgreSQL PG:dbname=osm datas/algeria-latest.osm.pbf -lco OVERWRITE=yes -lco SPATIAL_INDEX=YES --config OSM_CONFIG_FILE ./osmconf.ini
psql -d osm -c "vacuum"

Extraction vers shapefile

Export de PG vers shape des donées (admin_level=7 -> les communes).

ogr2ogr -f "ESRI Shapefile" datas/communes_algerie.shp PG:"dbname=osm" -sql "select osm_id, name, wkb_geometry as geom from multipolygons where admin_level = '7'"psql -d osm -c "vacuum"

Création du geojson simplifié

Import manuel dans mapshaper http://mapshaper.org/ puis sauvegarde en geojson.

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