anchor.diff:  locations. We think that this shows latitude and longitude have too many
   disadvantages to be adopted for a street addressing solution.
   
  -== link:http://geohash.org[Geohash]
  -
  -Geohash codes were designed to be used in short URLs to identify locations
  -<<geohash>>. They use 32 characters in their symbol set made up of 0-9A-Z excluding
  +== Geohash
  +
  +Geohash codes <<geohash-site>> were designed to be used in short URLs to identify locations
  +<<geohash32>>. They use 32 characters in their symbol set made up of 0-9A-Z excluding
   "A", "I", "L" and "O". This means that Geohash codes can include vowels (and
   the digits "0" and "1" with a similar appearance to "0" and "I"). Geohash
   can generate codes that include words ("DRUGGED"), almost words ("ZUR1CH")
  
positive.code: Open Post Codes have an optional checksum that can be used to distinguish
  the country a code was generated for.
  
  == link:http://nacgeo.com[Natural Area Code]
  
  Natural Area Code is a proprietary system that requires licenses to use
  <<naclicense>>. The codes are made up of up to three parts, the first
  provides the latitude, the second the longitude and an optional third part
  the altitude as the arctangent of the altitude relative to the Earth's
  
negative.code: 
  - [[[openpostcode]]] In Wikipedia. Retrieved October 15 2014 from http://en.wikipedia.org/wiki/Postal_addresses_in_the_Republic_of_Ireland
  
  - [[openpostcode-site]] http://www.openpostcode.org/ Retrieved October 15 2014.
  
  - [[[naclicense]]] Legal and Licensing Retrieved October 15 2014 from http://www.nacgeo.com/nacsite/licensing/
  
  - [[[nac]]] The Natural Area Coding System Retrieved October 15 2014 from http://www.nacgeo.com/nacsite/documents/nac.asp
  
  - [[nac-site]] http://nacgeo.com Retrieved October 15 2014.
  
  - [[[mls]]] In Wikipedia. Retrieved October 15 2014 from http://en.wikipedia.org/wiki/Maidenhead_Locator_System
  