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- W1010688112 abstract "In the past two decades, multibeam sonar systems have become the preferred seabed mapping tool. Many users have assumed that multibeam bathymetry data are highly accurate in spatial position. In reality, both vertical and horizontal uncertainties exist in every data point. These uncertainties are often represented as one single measure of Total Propagated Uncertainty (TPU). TPU is important to understand because it affects the quality of products generated from multibeam bathymetry data. To account for the magnitude and spatial distribution of this influence, an objective uncertainty analysis is required. Randomisation is the key process in such an uncertainty analysis. This study compared two randomisation methods, restricted spatial randomness (RSR) and complete spatial randomness (CSR), in an uncertainty analysis of a slope gradient dataset derived from multibeam bathymetry data. CSR regards data error in every grid cell as independent and assumes that the data error varies within a known statistical distribution without any neighbourhood effect. RSR assumes spatial structure and thus spatial auto-correlation in the data." @default.
- W1010688112 created "2016-06-24" @default.
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- W1010688112 date "2014-01-01" @default.
- W1010688112 modified "2023-09-26" @default.
- W1010688112 title "Measuring uncertainty in multibeam bathymetry data: An analysis of spatial randomness" @default.
- W1010688112 hasPublicationYear "2014" @default.
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