const map<unsigned, TrackType *> &trks = catalogue.get_tracks();
for(map<unsigned, TrackType *>::const_iterator i=trks.begin(); i!=trks.end(); ++i)
const map<unsigned, TrackType *> &trks = catalogue.get_tracks();
for(map<unsigned, TrackType *>::const_iterator i=trks.begin(); i!=trks.end(); ++i)