Abstract
Hydrographic survey or seabed mapping plays an important role in achieving better maritime safety, especially in coastal waters. Due to advances in survey technologies, it becomes important to choose well-suited technology for a specific area. Moreover, various technologies have various ranges of equipment and manufacturers, as well as characteristics. Therefore, in this paper, a novel method of a hydrographic survey, i.e., identifying the appropriate technology, has been developed. The method is based on a reduced elimination matrix, decision tree supervised learning, and multicriteria decision methods. The available technologies were: remotely operated underwater vehicle (ROV), unmanned aerial vehicle (UAV), light detection and ranging (LIDAR), autonomous underwater vehicle (AUV), satellite-derived bathymetry (SDB), and multibeam echosounder (MBES), and they are applied as a case study of Kaštela Bay. Results show, considering the specifics of the survey area, that UAV is the best-suited technology to be used for a hydrographic survey. However, some other technologies, such as SDB come close and can be considered an alternative for hydrographic surveys.
Highlights
Hydrographic survey technologies are rapidly advancing nowadays
Survey Technology Selection Based on the Decision Tree Supervised
Maximum depth is 45 m at the bay’s inlet. Heavy traffic across this area is under the Port Authority Split jurisdiction, consisting of passenger ports, trade ports, and a large number of ports and moorings for small boats [66]
Summary
Hydrographic survey technologies are rapidly advancing nowadays. Generally, survey technology encompasses traditional and modern techniques. ROV (remotely operated underwater vehicle), UAV (unmanned aerial vehicle), etc., are the most commonly used platforms. These platforms have an acoustic sensor that can be divided into SSS (side scan sonar), MBES (multibeam echo sounder), SBES (single beam echo sounder), etc. Light detection and ranging (LIDAR), aerial multispectral and hyperspectral sensors, satellite or aerial panchromatic imaging are often used optical sensors for modern hydrographic survey techniques. The equipment of both techniques represents a whole range of devices whose performance is constantly upgraded and improved
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