Postgresql
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ETL With OpenStreetMap: Simple Things Are Simple, But Then What?
OpenStreetMap data comes to you unfiltered, raw. OSM, being a crowdsourced map, gives you no guarantees of completeness, accuracy, or generally fitness for use. It's up to you to design a data pipeline that gets you the geodata you actually need.
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Keeping a thematic OpenStreetMap database up-to-date with osm2pgsql