GEOLINKS International Conference 2019, Book 3
ALGORITHMS FOR CLEANING DATA RECORDED BY MULTIBEAM ECHOSOUNDER
Assoc. Prof. Dr. Artur Makar
Modern hydrographic systems operating with the use of multibeam echosounder offer acquisition of a huge number of geospatial data. Despite of application of positioning systems and sensors for compensation of movement of echosounding ship, and of measurement or determination of sound velocity vertical distribution in water, part of the data are burdened with measurement errors. They are caused by disturbances although advanced methods minimizing the error of determining acoustic wave’s point of reflection from the sea-bottom are used. Cleaning of the data, consisting in removal of points deviating from general model according to the assigned criterion, is a solution of the problem. There are several criteria there and they allow for automatic extraction of fake points.
Bases of selected algorithms for automatic data cleaning used in hydrographical system are presented in the paper. Methods using the algorithms and profiles applying ways of cleaning are given there. Geospatial data obtained by means of interferometric echo-sounder were used.
multibeam echosounder, cleaning the data, filtering, Combined Uncertainty and Bathymetry Estimator, Total Propagated Error