Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Other major employers in the city include Ordnance Survey, the UK's national mapping agency, whose headquarters is located in a new building on the outskirts of the city, opened in February 2011. The Lloyd's Register Group has announced plans to move its London marine operations to a specially developed site at the University of Southampton. The area of Swaythling is home to Ford's Southampton Assembly Plant, where the majority of their Transit models are manufactured. Closure of the plant in 2013 was announced in 2012, with the loss of hundreds of jobs.
What's the name of the UK's national mapping agency?