April 24, 2017


The making of OS VectorMap District

The saying goes that it takes a village to raise a child, and it’s certainly a cross-team effort to create and maintain an OS OpenData product within OS. So, in addition to our surveying teams capturing changes across Britain and adding them to the 500 million features in our geospatial database, we caught up with some of the people who work on OS VectorMap District, our customisable backdrop map.

Raster version of OS VectorMap District

Creating and releasing OS VectorMap District

A couple of months ahead of a new release of OS VectorMap District, Derek Howland and our ‘GenIE’ team extract the data from our core database. We use this core large-scale data to derive OS VectorMap District so that OS OpenData customers can benefit from our meticulous revision policy and enjoy access to open data which is consistent and up-to-date across the whole of Great Britain. The sheer volume of this data means we process it in ‘partitions’ (created using the national road network) and then ‘stitch’ the data back together.

After processing, the data is stored and validated, to ensure consistency of content and currency. Edits which are identified by the system are manual edited in the Cartography team using their wide range of skills and knowledge to resolve any critical non-conformances in the content store data. This is fairly minimal – affecting about 650 features out of 24.5 million features in the content store!

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