Slides for a talk on "Surveying Our Landscape From Top to Bottom" given by Brian Kelly at a workshop on "Metrics and Social Web Services: Quantitative Evidence for their Use and Impact" held at the Open University, Milton Keynes on 11 July 2011. See http://www.ukoln.ac.uk/web-focus/events/workshops/eim-2011-07/ Note the slides were also used at the SOLO 2011 conference - see http://www.ukoln.ac.uk/web-focus/events/conferences/solo-2011/