OS is government-owned but self-funding through the sale of licences to use its maps. It had revenues of about £117m in 2009, of which roughly half came from the public sector, and provided a dividend of about £5m to the Treasury. The new arrangements are expected to cost about £20m in forgone revenues – which the government anticipates will be made up through increased tax revenues. The Treasury has agreed to fund the difference.The Ordnance Survey's Open Data site is here; may a million mashups bloom.
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