How 3D imaging is helping preserve history

Researchers have used a hand-held spring-mounted laser scanner to build a 3D map of the interior of the leaning Tower of Pisa. The data could be used by local conservators and for future interactive displays. via Pocket http://www.bbc.co.uk/news/technology-24179644#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa