For a good example of this, with a bit of the underlying mathematics see: https://kieranhealy.org/blog/archives/2013/06/09/using-metadata-to-find-paul-revere/

For a good example of this, with a bit of the underlying mathematics see: https://kieranhealy.org/blog/archives/2013/06/09/using-metadata-to-find-paul-revere/ https://kieranhealy.org/blog/archives/2013/06/09/using-metad...