SNN International

This Street Naming and Numbering Toolkit allows streets and properties that have been electronically captured to be given a street name and property number and address. This can be applied to appropriate data for any country in the world, whether they’re in Africa, Asia or Central or South America. SNN International combines and applies principles derived from the British Standard for addressing BS7666 and also some of the World Bank’s recommendations on street naming and numbering.

SNN International’s core features include:

• Algorithms to name each street segment individually or to combine continuous street segments into one street.
• Configurable rules to determine when a street intersection should result in a new street or remain part of the original.
• Number of properties in relation to a street or in a block formation.
• The numbering of properties on a street can adopt either alternate sequential, metric or decametric numbering. A lot of countries are used to alternate sequential numbering such as used in the UK. However, this is less suitable for in-fill when constant development interrupts the orderly sequential numbering of properties. Metric numbering is a logical way of solving this problem but can be confusing to those who are not used to it. Decametric is a hybrid of the two. For more information, please see the World Bank publication on these conventions
  http://siteresources.worldbank.org/CMUDLP/Resources/461753-1160058503655/Street_Addressing_Manual
• The naming of streets can be configured to use relevant spatial areas such as community boundaries.

• Street names can be allocated using a numbering convention appropriate for a large number of streets without an official name.
• Provisional names can be made for the use of multiple street aliases. This means as well as allocating a system generated name, official or even unofficial street names can be allocated to the same street to increase the likelihood of citizen adoption.