Keeping the map up to date

A useful video from the Ordnance Survey blog which shows visually the rate of change that takes place in the OS MasterMap Database each year - there are over 5000 edits to this base layer every day.



This second video shows a small area to the NW of Swindon, and how it changed over a 7 year period.



Follow @ordnancesurvey on Twitter to get more resources like this.

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