“Get the topography right and you will have the best chance of a good river model” Grantley Smith, University of Newcastle, New South Wales, Austrailia.These were the words that Grantley Smith spoke at the 2012 DHI UK User Group Meeting on 20th March. In the seminar, Grantley demonstrated that flood outlines and flows from river models can vary dramtically depending on the quality and density of survey data – especially around buildings. Storm Geomatics MD Mike Hopkins attended the event and was impressed with all the presentations and the organisation of the day.