let T = Control160 dmap["T",
    [const rel(tuple([NodeId: longint, Lat: real, Lon: real])) value ()]
    csvimport['/home/ralf/secondo/bin/CityNodes' + num2string(..), 0, ","]
    projectextend[; Osm_id: .NodeId, Pos: makepoint(.Lon, .Lat)]
  ]
  
# 5:54 min (10 workers)
# 2:44 min (30 workers)

query T dmap["", . feed count] getValue tie[. + ..];

# 315113976
  
restore SS from '/home/ralf/secondo/bin/SSGermany';

let k = 100;