By Matthew Stock LONDON (Reuters) - Researchers in England are hoping to help root out modern day slavery in northern India by using detailed satellite imagery to locate brick kilns - sites that are notorious for using millions of slaves, including children. A team of geospatial experts at the University of Nottingham use Google Maps and dozens of volunteers to identify potential sites of exploitation and report them to authorities. "The key thing at the moment is to get those statistics right and to get the locations of the brick kilns sorted," said Dr Doreen Boyd, a co-researcher on the 'Slavery from Space' project.