720 B


This is a small tool to extract interesting nodes from OpenStreetMap TTL Extracts as provided by the osm2rdf project.


osm_extractor reads N-Triples from standard input and writes N-Triples of interesting features (currently OSM nodes with the key man_made=surveillance) to standard output.

As the osm2rdf extracts are provided as Turtle files we need to first convert them to N-Triples (this will no longer be necessary as soon as the OCaml Turtle parser is available):

bunzip2 che.osm.ttl.bz2 | serdi -i turtle -o ntriples - | pv -c | dune exec ./osm_extractor.exe | tee che.osm.surveillance.nt