Accuracy aspects of processing and filtering of multibeam data: grid modeling versus TIN based modeling

Obtaining an accurate model of the sea floor is a m ajor concern in dredging works. Contemporary hydrographical surveying tools, especi ally the multibeam echosounder, yield a very dense point sampling of the seafloor. Subseque ntly, this immense amount of data needs to be processed in order to generate an accurate te rrain model, according to timeand accuracy constraints imposed by the client. Modelin g can be carried out in post-processing or in real-time. Performing a real-time accountability keeps track of the curor fill volume changes realized at that moment. Most multibeam sys tems deliver equidistant interpolated data, allowing faster processing to be achieved usi ng equidistant grid-based modeling.