The appointment, which was made following a pitch involving three agencies, will see Billington Cartmell develop an 18-month consumer campaign.
The campaign will focus on encouraging consumers to buy more Ordnance Survey maps by raising awareness of its broad range of products.
Ian Billington, Billington Cartmell chief executive, said: "This is obviously a great win for Billington Cartmell, a true blue-chip piece of business and an opportunity for us to help Ordnance Survey operate as a real commercial enterprise in an increasingly competitive environment."
This summer, Ordnance Survey teamed up with English Heritage for a campaign in stores stocking maps promoting the offer of a free day out at an English Heritage site to customers who bought two maps during July and August.
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