Geomorphometric analysis of the natural and anthropogenic seascape of Naples (Italy): A high‐resolution morpho‐bathymetric survey

Abstract

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Not another hillshade: alternatives which improve visualizations of bathymetric data

“…Most commonly, elevation data and morphological features are visualized with the hillshading method in which the lightness or darkness of a surface is determined by the incidence angle between the illumination direction and the surface, resulting in an intuitive representation of the morphology of the Earth's surface (Kokalj et al, 2011;Zaksěk et al, 2011). Some recent publications displaying hillshaded bathymetric data include: Madricardo et al, 2019;Caporizzo et al, 2021;Fabbri et al, 2021;Wu et al, 2021;Aiello and Sacchi, 2022;Li et al, 2022;Piret et al, 2022;Post et al, 2022;Riddick et al, 2022;Sandwell et al, 2022;Streuff et al, 2022;Zheng et al, 2022. Despite the widespread use of the Hillshade, analytical hillshading has inherent limitations due to the directional bias induced by a single light source (Onorati et al, 1992;Smith and Clark, 2005;Zaksěk et al, 2011;. The two most common problems with hillshading are 1) that morphological features which are parallel to the light source are barely visible (sometimes even invisible), and 2) that directly lit/shaded features are too light/dark to exhibit subtle relief (Zaksěk et al, 2011).…”