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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidade Federal do Paraná
2019
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| Online Access: | https://www.redalyc.org/articulo.oa?id=393962622002 https://www.redalyc.org/journal/3939/393962622002/ https://www.redalyc.org/journal/3939/393962622002/html/ https://www.redalyc.org/journal/3939/393962622002/393962622002.epub https://www.redalyc.org/journal/3939/393962622002/movil |
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Table of Contents:
- ROBUST METHODOLOGY FOR DETECTION OF SPIKES IN MULTIBEAM ECHO SOUNDER DATA Italo Oliveira Ferreira Afonso de Paula dos Santos Júlio César de Oliveira Nilcilene das Graças Medeiros Paulo César Emiliano Ciencias de la Tierra Spikes Outliers Multibeam Echo Sounder Multibeam Data Processing Currently, during the operation in shallow waters, scanning systems, such as multibeam systems, are capable of collecting thousands of points in a short time, promoting a greater coverage of the submerged bottom, with consequent increase in the detection capacity of objects. Although there has been an improvement in the accuracy of the depths collected, traditional processing, that is, manual, is still required. However, mainly due to the increased mass of data collected, manual processing has become extremely time-consuming and subjective, especially in the detection and elimination of spikes. Several algorithms are used to perform this task, but most of them are based on statistical assumptions hardly met and/or verified, such as spatial independence and normality. In this sense, the goal of this study is to present the SODA (Spatial Outlier Detection Algorithm) methodology, a new method for detection of spikes designed to treat bathymetric data collected through swath bathymetry systems. From computational simulation, promising results were obtained. SODA, in some cases, was capable to identify even 90% of spikes inserted on simulation, showing that the methodology is efficient and substantial to the bathymetric data treatment. 2019 artículo científico 1413-4853 https://www.redalyc.org/articulo.oa?id=393962622002 https://www.redalyc.org/journal/3939/393962622002/ https://www.redalyc.org/journal/3939/393962622002/html/ https://www.redalyc.org/journal/3939/393962622002/393962622002.epub https://www.redalyc.org/journal/3939/393962622002/movil 10.1590/s1982-21702019000300014 en http://www.redalyc.org/revista.oa?id=3939 Boletim de Ciências Geodésicas application/pdf Universidade Federal do Paraná Boletim de Ciências Geodésicas (Brasil) Num.3 Vol.25