Using British Standard Address Management to Boost the Ghanese Economy - 14/06/2018
This article outlines two approaches to determining the start and end of a street. The implications of both approaches in terms of complexity, ease of implementation and resultant costs are discussed by address management experts, Aligned Assets.
For many countries, the absence of formal, consistent address management is costing their governments and businesses huge sums of potential income. Without fully defined addresses, there are issues with tax collection, service provision and the efficiency of the emergency services. Considering this, it’s somewhat surprising that many cities and rural areas function as well as they do – but clearly at a great cost to individuals, businesses and governments alike.
Address management experts, Aligned Assets, are currently working with partner organisation, Jospong Group, in Ghana to allocate a street name for every street in the country, using their specially adapted SNN International solution. The solution implements principles from the British Standard for addressing, the World Bank standards for street naming and numbering and conventions from the Universal Postal Union. This is a considerable feat, since over a million streets and 20 million properties in this developing nation require naming and numbering - from sparsely populated rural areas to the densely populated urban towns and cities.
Naturally, the process of introducing street naming systems to countries for the first time is not an easy task and can lead to conflict between logic and practicality. While knowing where a street starts and ends may seem like a straightforward process, in the 100 or so countries where there is no street-naming convention in place, this can be quite the opposite. Identifying where a street starts and ends defines the geometry of the street.
There are two main approaches that can be taken, each with its own implications – both financial and cultural. The difference is in how street segments are treated in determining the start and end of a street. A street segment is part of a street between two intersections or junctions.
Approach 1 - Each Street Segment as a Street
The first approach is to treat each segment as a street in its own right, giving each one its own name. This is easy to understand, follows an obvious logic, and is relatively easy to derive the street names using an automated algorithm. However, in densely populated urban areas, this will result in the production of an excessive number of street names, leading to both escalating costs for signage and potential resistance from residents and local service providers.
There is however, an advantage to individually defining each segment even if multiple segments are later on going to be treated as one street. Capturing each one as a different object in a GIS or address management system provides some flexibility concerning the naming convention. It also allows data users to assign different attributes to each separate, yet related, street segment - such as width, surface material, direction of traffic, postcode, etc.
Approach 2 - Multiple Street Segments in One Street
Although the address management which treats multiple sequential segments as one street is perhaps the more user-friendly and more preferable method to the majority of countries that already have an established street naming system, the alternative approach will reduce the number of named streets by a factor of three or four, and thereby significantly reduce the costs of signage and create a more manageable data set for a local authority to administer – although it is a much more complex one. For example, exact rules as to where a street starts and ends need to be established to ensure consistency, particularly if this process is to be automated. After all, manual processing is likely to be prohibitive due to the considerable amount of required field and surveying work.
Another important consideration relates to the acceptance of the new names by the citizens and services that will be using the road networks. Any government introducing a universal street naming system should be seeking to maximise early adoption by users by ensuring that the chosen names are both neutral and logical.
In order to assist the Ghanese government, Aligned Assets identified the best approach for naming the million plus streets across the country by applying the two approaches to a sample area of the capital city Accra. As expected, the number of streets generated by allocating a name to every street segment generated significantly more streets than the approach taking sequential segments as one street. In addition, due to the density of streets in the sample area, the former approach also resulted in very small street segments being treated as streets in their own right - even when they didn’t contain any settlements, businesses or services. As mentioned, this would result in unnecessary signage and street maintenance costs. There are around 125,000 street segments in Greater Accra, however if approach two is taken and the segments are combined, it results in around 40,000 streets resulting in a cost reduction of a factor three for street signage.
Dinesh Thanigasalam, Commercial Director for Aligned Assets, told us, ‘There really isn’t one simple solution. Based on the results of the sample, the logical approach for the densely populated cities is to treat multiple sequential segments as one street, while in the more sparsely populated remote areas of the country, treating each segment as a street in its own right would be more beneficial. We’ll then be able to use our SNN International software (an adaptation of our UK Street Naming and Numbering solution) to name the streets and number all the properties. This simple introduction of an address creation and management system will be the foundations on which services can be reliably provided to citizens and income can be generated by businesses and government.’
Aligned Assets developed their UK Street Naming and Numbering software specifically for naming and numbering all the streets and properties in Ghana, and have made it available to the international market. For more information on Aligned Assets’ address management solutions both overseas and in the UK, go to www.aligned-assets.co.uk or call 01483 717963.
This article was published in GIS Professional June 2018Last updated: 03/07/2018