Wyniki wyszukiwania - BazTech

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Analysis of qualitative and quantitative assessment methods for shoreline extraction

Łącka Magorzata, Łubczonek Jacek

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2022

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nr 69 (141)

9--19

EN

The shoreline is an important geographical zone, and knowledge of its accurate location can be crucial for coastal management and mapping. The ever-increasing number of aerial and satellite sensors is leading to research related to the development of new methods for the automatic extraction of the shoreline. Currently, there is a lot of research in this area with different research methodologies. In this paper, an analysis of shoreline extraction methods was carried out. Based on the analysis undertaken, current research processes in this field can be verified. This enabled the further evaluation of the research methodologies studied, including the identification of basic assessment elements for shoreline extraction accuracy. Practical aspects of this work include the ability to establish the correct methods to assess the accuracy of extracted shorelines for both research and production processes related to data extracted from remotely sensed images.

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The use of an unmanned aerial vehicle to acquire data to develop inland electronic navigational charts: The case of a bridge and the navigation infrastructure located on it

Łubczonek Jacek

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2021

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nr 68 (140)

119--127

EN

Unmanned aerial vehicle (UAV) technologies are becoming increasingly common, with ever-expanding applications. Low-altitude imaging makes it possible to quickly acquire high-resolution data for various objects, especially for mapping. This paper presents the mapping of a bridge and its notice marks, lights, and span to produce electronic navigation charts for inland navigation. The research object was the Clowy Bridge on the Regalica River in Szczecin, Poland. In order to carry out the research, two photogrammetric flights were made, and three sets of photos were created, from which orthophotos were developed. The research included the analysis of the orthophoto generation process, as well as quantitative and qualitative analyses. The results of the research demonstrated the possibility of using this type of data for mapping bridges to create electronic navigation maps for inland navigation.

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Analysis of the accuracy of shoreline mapping in inland navigational charts (Inland ENC) using photogrammetric and sonar images

Łubczonek Jacek, Łącka Małgorzata, Zaniewicz Grzegorz

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2019

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nr 58 (130)

45--54

EN

Shoreline mapping is one of the key stages in navigational charting. In terms of navigation, the shoreline marks the boundary of a river, which is often equivalent to the navigable water area. In cartographic terms, it is an important topological element between different objects that are adjacent to it. Currently, topographic objects are often mapped using photogrammetric materials obtained from various altitudes – satellite, airborne or low, which is associated with the use of an airborne UAV. Depending on the type of materials, the shoreline can be obtained in vector form with differing situational accuracy and differing degree of detail. In addition to the standard methods of processing vector data, the research in this paper also included the use of sonar images, enabling the detection of the shoreline with the use of a surveying hydrographic unit. On the basis of the collected photogrammetric and sonar images of different spatial resolution, an analysis of the accuracy of shoreline mapping was performed in terms of the situational accuracy and the level of detail in its representation. The results of the research provided the basis for the determination of dedicated remote sensing materials enabling the development of maps for inland navigation.