Hi,

    
On 07/14/2015 11:05 AM, Christian Grün
      wrote:

    

    

      It may be slightly faster if you remove the explicit string()
      conversion

    No, it's actually slower.

    
But please note that BaseX provides no native range
      index, which would
      be a good fit for your longitude/latitude filter.
    

    Should
    
    geo:within of http://docs.basex.org/wiki/Geo_Module
    help?