Preprints
https://doi.org/10.5194/essd-2024-58
https://doi.org/10.5194/essd-2024-58
08 Mar 2024
 | 08 Mar 2024
Status: this preprint is currently under review for the journal ESSD.

Catalogue of coastal-based instances with bathymetric and topographic data

Owein Thuillier, Nicolas Le Josse, Alexandru-Liviu Olteanu, Marc Sevaux, and Hervé Tanguy

Abstract. We provide a catalogue of 17 700 unique coastal-based instances distributed throughout the globe and derived from bathymetric and topographic data made publicly available by the GEneral Bathymetric Chart of the Oceans (GEBCO) as of 2022. These instances, or Digital Elevation Models (DEMs), are delivered in the form of raster grids with a 15 arc-seconds resolution and are divided equally into three libraries “A”, “B” and “C”. In a given library, the dimensions range from a minimum of 10×10 cells to a maximum of 300×300 with an incremental step of 5, i.e. 59 unique dimensions with 100 instances per dimension. In addition, for each dimension, these instances are ordered by increasing number of maritime cells and have in common the presence of a unique maritime connected component with a ratio of maritime cells lying between 25 % and 95 %, so as to cover a broad spectrum of different coastlines geometries. In this paper, we will describe in detail the procedure used for their automated generation. The resulting catalogue can be downloaded from Zenodo, a general-purpose repository operated by CERN (European Organisation for Nuclear Research) and developed under the European OpenAIRE program, at the following persistent address: https://doi.org/10.5281/zenodo.10530247 (last access: February 15th, 2024) (Thuillier et al. (2024b)). Additionally, a set of 18 colour palettes specifically designed for the visualisation of DEMs has been derived for this occasion and is available at the following address: https://doi.org/10.5281/zenodo.10530296 (last accessed: February 15th, 2024) (Thuillier et al. (2024c)). Both of these repositories come with a comprehensive documentation.

Owein Thuillier, Nicolas Le Josse, Alexandru-Liviu Olteanu, Marc Sevaux, and Hervé Tanguy

Status: open (until 19 May 2024)

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Owein Thuillier, Nicolas Le Josse, Alexandru-Liviu Olteanu, Marc Sevaux, and Hervé Tanguy
Owein Thuillier, Nicolas Le Josse, Alexandru-Liviu Olteanu, Marc Sevaux, and Hervé Tanguy

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Short summary
Our study unveils a comprehensive catalogue of 17,700 unique coastal Digital Elevation Models (DEMs), derived from the General Bathymetric Chart of the Oceans (GEBCO) as of 2022. These DEMs are designed to support a variety of scientific and educational purposes. Organized into three libraries, they cover a wide range of coastal geometries and different size. Data and custom colour palettes for visualisation are made freely available online, promoting open-science and collaboration.
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