Hydro International will be at the ESRI User Conference, which is to be held from 12th to 16th July 2010 in San Diego, CA, USA. Publishing director Durk Haarsma and account manager Victor van Essen will be available to talk to you.
Members of the US Geological Survey were filmed while out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyses the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed.
